Jiri Olsa [Wed, 9 Aug 2017 16:14:06 +0000 (18:14 +0200)]
perf: Fix header.size for namespace events
Reset header size for namespace events, otherwise it only gets bigger in
ctx iterations.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Fixes:
e422267322cd ("perf: Add PERF_RECORD_NAMESPACES to include namespaces related info")
Link: http://lkml.kernel.org/n/tip-nlo4gonz9d4guyb8153ukzt0@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Sihyeon Jang [Thu, 16 Nov 2017 13:06:49 +0000 (22:06 +0900)]
perf lock: Document missing options
Add man page entry for --force.
Signed-off-by: Sihyeon Jang <uneedsihyeon@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: http://lkml.kernel.org/r/1510837609-6277-1-git-send-email-uneedsihyeon@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Kim Phillips [Tue, 14 Nov 2017 21:04:52 +0000 (15:04 -0600)]
perf evsel: Say which PMU Hardware event doesn't support sampling/overflow-interrupts
Help identify to the user the event with the unsupported sampling error.
Also suggest a corrective action.
BEFORE:
$ sudo ./oldperf record -e armv8_pmuv3/mem_access/,ccn/cycles/,armv8_pmuv3/l2d_cache/ true
Error:
PMU Hardware doesn't support sampling/overflow-interrupts.
AFTER:
$ sudo ./newperf record -e armv8_pmuv3/mem_access/,ccn/cycles/,armv8_pmuv3/l2d_cache/ true
Error:
ccn/cycles/: PMU Hardware doesn't support sampling/overflow-interrupts. Try 'perf stat'
Signed-off-by: Kim Phillips <kim.phillips@arm.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20171114150452.e846f2e23684c7d7d8ee706f@arm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Kim Phillips [Tue, 14 Nov 2017 21:04:47 +0000 (15:04 -0600)]
perf c2c: Fix spelling mistakes in browser help text
Togle -> Toggle, lenght -> length.
Signed-off-by: Kim Phillips <kim.phillips@arm.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20171114150447.f4b63bc5d97c83cdaa8bf7dc@arm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Arnaldo Carvalho de Melo [Tue, 14 Nov 2017 16:30:19 +0000 (13:30 -0300)]
perf top: Ignore kptr_restrict when not sampling the kernel
If all events have attr.exclude_kernel set, no need to look at
kptr_restrict.
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/n/tip-yegpzg5bf2im69g0tfizqaqz@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Arnaldo Carvalho de Melo [Tue, 14 Nov 2017 14:03:19 +0000 (11:03 -0300)]
perf record: Ignore kptr_restrict when not sampling the kernel
If we're not sampling the kernel, we shouldn't care about kptr_restrict
neither synthesize anything for assisting in resolving kernel samples,
like the reference relocation symbol or kernel modules information.
Before:
$ cat /proc/sys/kernel/kptr_restrict /proc/sys/kernel/perf_event_paranoid
2
2
$ perf record sleep 1
WARNING: Kernel address maps (/proc/{kallsyms,modules}) are restricted,
check /proc/sys/kernel/kptr_restrict.
Samples in kernel functions may not be resolved if a suitable vmlinux
file is not found in the buildid cache or in the vmlinux path.
Samples in kernel modules won't be resolved at all.
If some relocation was applied (e.g. kexec) symbols may be misresolved
even with a suitable vmlinux or kallsyms file.
Couldn't record kernel reference relocation symbol
Symbol resolution may be skewed if relocation was used (e.g. kexec).
Check /proc/kallsyms permission or run as root.
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.001 MB perf.data (8 samples) ]
$ perf evlist -v
cycles:uppp: size: 112, { sample_period, sample_freq }: 4000, sample_type: IP|TID|TIME|PERIOD, disabled: 1, inherit: 1, exclude_kernel: 1, mmap: 1, comm: 1, freq: 1, enable_on_exec: 1, task: 1, precise_ip: 3, sample_id_all: 1, exclude_guest: 1, mmap2: 1, comm_exec: 1
$
After:
$ perf record sleep 1
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.001 MB perf.data (10 samples) ]
$
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/n/tip-t025e9zftbx2b8cq2w01g5e5@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Arnaldo Carvalho de Melo [Tue, 14 Nov 2017 14:12:11 +0000 (11:12 -0300)]
perf report: Ignore kptr_restrict when not sampling the kernel
If none of the evsels has attr.exclude_kernel set to zero, no kernel
samples, so no point in warning the user about problems in processing
kernel samples, as there will be none.
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/n/tip-7dn926v3at8txxkky92aesz2@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Arnaldo Carvalho de Melo [Tue, 14 Nov 2017 14:01:06 +0000 (11:01 -0300)]
perf evlist: Add helper to check if attr.exclude_kernel is set in all evsels
The warning about kptr_restrict needs to be emitted only when it is set
and we ask for kernel space samples, so add a helper to help with that.
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/n/tip-fh7drty6yljei9gxxzer6eup@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Thomas Richter [Tue, 14 Nov 2017 07:18:47 +0000 (08:18 +0100)]
perf test shell: Fix test case probe libc's inet_pton on s390x
The 'perf test' case "probe libc's inet_pton & backtrace it with ping"
fails on s390x. The reason is the 'realpath /lib64/ld*.so.* | uniq' line
which returns 2 libraries:
root@s35lp76 shell]# realpath /lib64/ld*.so.* | uniq
/usr/lib64/ld-2.26.so
/usr/lib64/ld_pre_smc.so.1.0.1
[root@s35lp76 shell]
This output makes the "perf probe" command lines invalid.
Use ldd tool to find out the libraries required by "bash" and check if
symbol "inet_pton" is part of the "libc" library. Some distros do not
have a /lib64 directory.
I have also added a check for the existence of an IPv6 network interface
before it is being used.
Committer changes:
We can't really use ldd for libc, as in some systems, such as x86_64, it
has hardlinks and then ldd sees one and the kernel the other, so grep
for libc in /proc/self/maps to get the one we'll receive from
PERF_RECORD_MMAP.
Thomas checked this change and acked it.
Signed-off-by: Thomas-Mich Richter <tmricht@linux.vnet.ibm.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Suggested-by: Hendrik Brückner <brueckner@linux.vnet.ibm.com>
Reviewed-by: Hendrik Brückner <brueckner@linux.vnet.ibm.com>
Link: http://lkml.kernel.org/r/20171114133409.GN8836@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Thomas Richter [Tue, 14 Nov 2017 07:18:46 +0000 (08:18 +0100)]
perf test shell: Fix check open filename arg using 'perf trace' on s390x
This 'perf test' case fails on s390x. The 'touch' command on s390x uses
the 'openat' system call to open the file named on the command line:
[root@s35lp76 perf]# perf probe -l
probe:vfs_getname (on getname_flags:72@fs/namei.c with pathname)
[root@s35lp76 perf]# perf trace -e open touch /tmp/abc
0.400 ( 0.015 ms): touch/27542 open(filename:
/usr/lib/locale/locale-archive, flags: CLOEXEC) = 3
[root@s35lp76 perf]#
There is no 'open' system call for file '/tmp/abc'. Instead the 'openat'
system call is used:
[root@s35lp76 perf]# strace touch /tmp/abc
execve("/usr/bin/touch", ["touch", "/tmp/abc"], 0x3ffd547ec98
/* 30 vars */) = 0
[...]
openat(AT_FDCWD, "/tmp/abc", O_WRONLY|O_CREAT|O_NOCTTY|O_NONBLOCK, 0666) = 3
[...]
On s390x the 'egrep' command does not find a matching pattern and
returns an error.
Fix this for s390x create a platform dependent command line to enable
the 'perf probe' call to listen to the 'openat' system call and get the
expected output.
Signed-off-by: Thomas-Mich Richter <tmricht@linux.vnet.ibm.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
Cc: Thomas-Mich Richter <tmricht@linux.vnet.ibm.com>
LPU-Reference:
20171114071847.2381-1-tmricht@linux.vnet.ibm.com
Link: http://lkml.kernel.org/n/tip-3qf38jk0prz54rhmhyu871my@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Ravi Bangoria [Tue, 14 Nov 2017 03:25:40 +0000 (08:55 +0530)]
perf annotate: Do not truncate instruction names at 6 chars
There are many instructions, esp on PowerPC, whose mnemonics are longer
than 6 characters. Using precision limit causes truncation of such
mnemonics.
Fix this by removing precision limit. Note that, 'width' is still 6, so
alignment won't get affected for length <= 6.
Before:
li r11,-1
xscvdp vs1,vs1
add. r10,r10,r11
After:
li r11,-1
xscvdpsxds vs1,vs1
add. r10,r10,r11
Reported-by: Donald Stence <dstence@us.ibm.com>
Signed-off-by: Ravi Bangoria <ravi.bangoria@linux.vnet.ibm.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Taeung Song <treeze.taeung@gmail.com>
Link: http://lkml.kernel.org/r/20171114032540.4564-1-ravi.bangoria@linux.vnet.ibm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Namhyung Kim [Tue, 14 Nov 2017 00:15:42 +0000 (09:15 +0900)]
perf help: Fix a bug during strstart() conversion
The commit
8e99b6d4533c changed prefixcmp() to strstart() but missed to
change the return value in some place. It makes perf help print
annoying output even for sane config items like below:
$ perf help
'.root': unsupported man viewer sub key.
...
Reported-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Tested-by: Taeung Song <treeze.taeung@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Sihyeon Jang <uneedsihyeon@gmail.com>
Cc: kernel-team@lge.com
Link: http://lkml.kernel.org/r/20171114001542.GA16464@sejong
Fixes:
8e99b6d4533c ("tools include: Adopt strstarts() from the kernel")
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Arnaldo Carvalho de Melo [Mon, 13 Nov 2017 19:06:29 +0000 (16:06 -0300)]
perf machine: Guard against NULL in machine__exit()
A recent fix for 'perf trace' introduced a bug where
machine__exit(trace->host) could be called while trace->host was still
NULL, so make this more robust by guarding against NULL, just like
free() does.
The problem happens, for instance, when !root users try to run 'perf
trace':
[acme@jouet linux]$ trace
Error: No permissions to read /sys/kernel/debug/tracing/events/raw_syscalls/sys_(enter|exit)
Hint: Try 'sudo mount -o remount,mode=755 /sys/kernel/debug/tracing'
perf: Segmentation fault
Obtained 7 stack frames.
[0x4f1b2e]
/lib64/libc.so.6(+0x3671f) [0x7f43a1dd971f]
[0x4f3fec]
[0x47468b]
[0x42a2db]
/lib64/libc.so.6(__libc_start_main+0xe9) [0x7f43a1dc3509]
[0x42a6c9]
Segmentation fault (core dumped)
[acme@jouet linux]$
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andrei Vagin <avagin@openvz.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Vasily Averin <vvs@virtuozzo.com>
Cc: Wang Nan <wangnan0@huawei.com>
Fixes:
33974a414ce2 ("perf trace: Call machine__exit() at exit")
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Wang Nan [Mon, 13 Nov 2017 01:38:07 +0000 (01:38 +0000)]
perf tests: Set evlist of test__task_exit() to !overwrite
Changing ringbuffer to !overwrite in this task is harmless because
this test uses a very low frequency (1) and using a very simple program
(true). There should have only 3 events in the whole test. Overwriting
is impossible to happen.
Signed-off-by: Wang Nan <wangnan0@huawei.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kan Liang <kan.liang@intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: http://lkml.kernel.org/r/20171113013809.212417-6-wangnan0@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Wang Nan [Mon, 13 Nov 2017 01:38:06 +0000 (01:38 +0000)]
perf tests: Set evlist of test__basic_mmap() to !overwrite
In this test, a large ring buffer is required so all events can feed
into, so overwrite or not is meaningless.
Change to !overwrite so following commits can remove this argument.
Signed-off-by: Wang Nan <wangnan0@huawei.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kan Liang <kan.liang@intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: http://lkml.kernel.org/r/20171113013809.212417-5-wangnan0@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Wang Nan [Mon, 13 Nov 2017 01:38:05 +0000 (01:38 +0000)]
perf tests: Set evlist of test__sw_clock_freq() to !overwrite
Unsetting overwrite when calling perf_evlist__mmap is harmless. This
commit passes false to it, makes following commits eliminate the
overwrite argument easier.
Signed-off-by: Wang Nan <wangnan0@huawei.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kan Liang <kan.liang@intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: http://lkml.kernel.org/r/20171113013809.212417-4-wangnan0@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Wang Nan [Mon, 13 Nov 2017 01:38:04 +0000 (01:38 +0000)]
perf tests: Set evlist of test__backward_ring_buffer() to !overwrite
Setting overwrite in perf_evlist__mmap() is meaningless because the
event in this evlist is already have 'overwrite' postfix and goes to
backward ring buffer automatically. Pass 'false' to perf_evlist__mmap()
to make it similar to others.
Signed-off-by: Wang Nan <wangnan0@huawei.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kan Liang <kan.liang@intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: http://lkml.kernel.org/r/20171113013809.212417-3-wangnan0@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Sihyeon Jang [Sun, 12 Nov 2017 01:10:47 +0000 (10:10 +0900)]
perf top: Remove a duplicate word
Signed-off-by: Sihyeon Jang <uneedsihyeon@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: http://lkml.kernel.org/r/1510449047-12941-3-git-send-email-uneedsihyeon@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Sihyeon Jang [Sun, 12 Nov 2017 01:10:46 +0000 (10:10 +0900)]
perf top: Document missing options
Signed-off-by: Sihyeon Jang <uneedsihyeon@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: http://lkml.kernel.org/r/1510449047-12941-2-git-send-email-uneedsihyeon@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Andi Kleen [Thu, 9 Nov 2017 14:55:26 +0000 (06:55 -0800)]
perf script: Allow printing period for non freq mode groups
When using leader sampling the values of the not sampled but counted
events are shown by perf script in "period".
Currently printing period is only allowed when the main event has a
period, that is it is in frequency mode.
This implies that we cannot dump the values of counted events when the
leader event is not in frequency mode.
Just remove the check that the period must be set on all events. It will
just be printed as 0 instead if it's not available.
This fixes the following:
$ perf record -c 100000 -e '{cycles,branches}:S'
$ perf script -F event,period
Further commentary by Jiri Olsa:
The period will be the value of configured period, not 0:
int perf_evsel__parse_sample(struct ...
...
data->period = evsel->attr.sample_period;
$ perf record -c 100000
$ perf script -F event,period | head -3
Failed to open /tmp/perf-2048.map, continuing without symbols
100000 cycles:ppp:
100000 cycles:ppp:
other than that I think we can remove that check, because we will have
always sane number in period
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Link: http://lkml.kernel.org/r/20171109145528.23371-4-andi@firstfloor.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Andi Kleen [Thu, 9 Nov 2017 14:55:24 +0000 (06:55 -0800)]
perf tools: Document some missing perf.data headers
Document STAT and CACHE header entries.
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Link: http://lkml.kernel.org/r/20171109145528.23371-2-andi@firstfloor.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Thomas-Mich Richter [Tue, 7 Nov 2017 14:48:53 +0000 (15:48 +0100)]
perf buildid-cache: Update help text for purge command
Clarify the perf buildid-cache help text for the purge operation. The
purge subcommand takes a list of files (binaries) as option parameter.
Make the wording the same as for the add and remove operation.
Signed-off-by: Thomas-Mich Richter <tmricht@linux.vnet.ibm.com>
Reviewed-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
Acked-by: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
LPU-Reference:
20171107144853.12925-1-tmricht@linux.vnet.ibm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Sukadev Bhattiprolu [Wed, 8 Nov 2017 23:42:03 +0000 (18:42 -0500)]
perf vendor events powerpc: Update POWER9 events
The POWER9 hardware has dropped support for several events, added
a few new events and changed the category for a couple of events.
Update the POWER9 events in Linux to reflect these changes.
Signed-off-by: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Madhavan Srinivasan <maddy@linux.vnet.ibm.com>
Link: http://lkml.kernel.org/r/20171108201938.GA10985@us.ibm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Arnaldo Carvalho de Melo [Thu, 9 Nov 2017 19:04:26 +0000 (16:04 -0300)]
perf script: Fix --per-event-dump for auxtrace synth evsels
When processing PERF_RECORD_AUXTRACE_INFO several perf_evsel entries
will be synthesized and inserted into session->evlist, eventually ending
in perf_script.tool.sample(), which ends up calling builtin-script.c's
process_event(), that expects evsel->priv to be a perf_evsel_script
object with a valid FILE pointer in fp.
So we need to intercept the processing of PERF_RECORD_AUXTRACE_INFO and
then setup evsel->priv for these newly created perf_evsel instances, do
it to fix the segfault in process_event() trying to use a NULL for that
FILE pointer.
Reported-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ravi Bangoria <ravi.bangoria@linux.vnet.ibm.com>
Cc: Wang Nan <wangnan0@huawei.com>
Cc: yuzhoujian <yuzhoujian@didichuxing.com>
Fixes:
a14390fde64e ("perf script: Allow creating per-event dump files")
Link: http://lkml.kernel.org/n/tip-bthnur8r8de01gxvn2qayx6e@git.kernel.org
[ Merge fix by Ravi Bangoria before pushing upstream to preserv bisectability ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Seonghyun Park [Thu, 9 Nov 2017 14:07:04 +0000 (23:07 +0900)]
perf tests: Add missing WRITE_ASS for new fields of perf_event_attr
Include newly added fields 'mmap2', 'comm_exec', 'use_clockid', 'namespaces',
'write_backward' and 'context_switch' from perf_event_attr to store_event().
Signed-off-by: Seonghyun Park <seonghyun0p@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Seonghyun Park <seonghyun0p@gmail.com>
Link: http://lkml.kernel.org/n/tip-vltn7pqhcv8h5fmo9cthk87q@git.kernel.org
[ Fix log message to add 'write_backward', fix the patch to add 'use_clock_id' ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Arnaldo Carvalho de Melo [Thu, 9 Nov 2017 15:03:40 +0000 (12:03 -0300)]
perf evsel: Fix up leftover perf_evsel_stat usage via evsel->priv
I forgot one conversion, which got noticed by Thomas when running:
$ perf stat -e '{cpu-clock,instructions}' kill
kill: not enough arguments
Segmentation fault (core dumped)
$
Fix it, those stats are in evsel->stats, not anymore in evsel->priv.
Reported-by: Thomas-Mich Richter <tmricht@linux.vnet.ibm.com>
Tested-by: Thomas-Mich Richter <tmricht@linux.vnet.ibm.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Fixes:
e669e833da8d ("perf evsel: Restore evsel->priv as a tool private area")
Link: http://lkml.kernel.org/r/20171109150046.GN4333@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Jiri Olsa [Wed, 8 Nov 2017 10:27:37 +0000 (11:27 +0100)]
perf tools: Use shell function for perl cflags retrieval
Using the shell function for perl CFLAGS retrieval instead of back
quotes (``). Both execute shell with the command, but the latter is more
explicit and seems to be the preferred way.
Also we don't have any other use of the back quotes in perf Makefiles.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20171108102739.30338-2-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Andrei Vagin [Wed, 8 Nov 2017 00:22:46 +0000 (16:22 -0800)]
perf trace: Fix an exit code of trace__symbols_init
Currently if trace_event__register_resolver() fails, we return -errno,
but we can't be sure that errno isn't zero in this case.
Signed-off-by: Andrei Vagin <avagin@openvz.org>
Reviewed-by: Jiri Olsa <jolsa@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Vasily Averin <vvs@virtuozzo.com>
Link: http://lkml.kernel.org/r/20171108002246.8924-2-avagin@openvz.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Andi Kleen [Fri, 20 Oct 2017 20:27:54 +0000 (13:27 -0700)]
perf evsel: Enable type checking for perf_evsel_config_term types
Use a typed enum for the perf_evsel_config_term type enum. This allows
gcc to do much stronger type checks, and also check for missing case
statements.
I removed the unused _MAX member from the number.
It found one missing case. I'm not sure it's a real problem, so I just
turned it into a BUG_ON for now.
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Link: http://lkml.kernel.org/r/20171020202755.21410-1-andi@firstfloor.org
[ Renamed the enum name to term_type as per jolsa's request ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Andi Kleen [Fri, 20 Oct 2017 20:27:55 +0000 (13:27 -0700)]
perf record: Fix -c/-F options for cpu event aliases
The Intel PMU event aliases have a implicit period= specifier to set the
default period.
Unfortunately this breaks overriding these periods with -c or -F,
because the alias terms look like they are user specified to the
internal parser, and user specified event qualifiers override the
command line options.
Track that they are coming from aliases by adding a "weak" state to the
term. Any weak terms don't override command line options.
I only did it for -c/-F for now, I think that's the only case that's
broken currently.
Before:
$ perf record -c 1000 -vv -e uops_issued.any
...
{ sample_period, sample_freq } 2000003
After:
$ perf record -c 1000 -vv -e uops_issued.any
...
{ sample_period, sample_freq } 1000
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Link: http://lkml.kernel.org/r/20171020202755.21410-2-andi@firstfloor.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Arnaldo Carvalho de Melo [Tue, 7 Nov 2017 16:41:35 +0000 (13:41 -0300)]
tools headers: Synchronize kernel ABI headers wrt SPDX tags
Two more, that were just in perf/core and thus weren't covered by Ingo's
latest headers synch, kcmp.h and prctl.h, silencing this:
Warning: Kernel ABI header at 'tools/include/uapi/linux/kcmp.h' differs from latest version at 'include/uapi/linux/kcmp.h'
Warning: Kernel ABI header at 'tools/include/uapi/linux/prctl.h' differs from latest version at 'include/uapi/linux/prctl.h'
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/n/tip-2a0r7iybyqpkftllyy5t9hfk@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Jiri Olsa [Wed, 11 Oct 2017 15:01:58 +0000 (17:01 +0200)]
perf annotate: Align source and offset lines
Align source with offset lines, which are more advanced, because of the
address column.
Before:
: static void *worker_thread(void *__tdata)
: {
0.00 : 48a971: push %rbp
0.00 : 48a972: mov %rsp,%rbp
0.00 : 48a975: sub $0x30,%rsp
0.00 : 48a979: mov %rdi,-0x28(%rbp)
0.00 : 48a97d: mov %fs:0x28,%rax
0.00 : 48a986: mov %rax,-0x8(%rbp)
0.00 : 48a98a: xor %eax,%eax
: struct thread_data *td = __tdata;
0.00 : 48a98c: mov -0x28(%rbp),%rax
0.00 : 48a990: mov %rax,-0x10(%rbp)
: int m = 0, i;
0.00 : 48a994: movl $0x0,-0x1c(%rbp)
: int ret;
:
: for (i = 0; i < loops; i++) {
0.00 : 48a99b: movl $0x0,-0x18(%rbp)
After:
: static void *worker_thread(void *__tdata)
: {
0.00 : 48a971: push %rbp
0.00 : 48a972: mov %rsp,%rbp
0.00 : 48a975: sub $0x30,%rsp
0.00 : 48a979: mov %rdi,-0x28(%rbp)
0.00 : 48a97d: mov %fs:0x28,%rax
0.00 : 48a986: mov %rax,-0x8(%rbp)
0.00 : 48a98a: xor %eax,%eax
: struct thread_data *td = __tdata;
0.00 : 48a98c: mov -0x28(%rbp),%rax
0.00 : 48a990: mov %rax,-0x10(%rbp)
: int m = 0, i;
0.00 : 48a994: movl $0x0,-0x1c(%rbp)
: int ret;
:
: for (i = 0; i < loops; i++) {
0.00 : 48a99b: movl $0x0,-0x18(%rbp)
It makes bigger different when displaying script sources, where the
comment lines looks oddly shifted from the lines which actually hold
code. I'll send script support separately.
Committer note:
Do not use a fixed column width for the addresses, as kernel ones se
more than 10 columns, look at the last offset and get the right width.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20171011150158.11895-36-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Jiri Olsa [Wed, 11 Oct 2017 15:01:57 +0000 (17:01 +0200)]
perf annotate browser: Add disasm_line__write function
Factor disasm_line__write function from annotate_browser__write, which
now keeps only generic display code.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20171011150158.11895-35-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Jiri Olsa [Wed, 11 Oct 2017 15:01:56 +0000 (17:01 +0200)]
perf annotate browser: Use struct annotation_line in browser top
Use struct annotation_line in browser::b::top.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20171011150158.11895-34-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Jiri Olsa [Wed, 11 Oct 2017 15:01:55 +0000 (17:01 +0200)]
perf annotate browser: Use struct annotation_line in find functions
Use struct annotation_line in find functions:
annotate_browser__find_string
annotate_browser__find_string_reverse
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20171011150158.11895-33-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Jiri Olsa [Wed, 11 Oct 2017 15:01:54 +0000 (17:01 +0200)]
perf annotate browser: Use struct annotation_line in browser_line
Using struct annotation_line arg in browser_line
function to make it generic.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20171011150158.11895-32-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Jiri Olsa [Wed, 11 Oct 2017 15:01:53 +0000 (17:01 +0200)]
perf annotate browser: Change offsets to struct annotation_line
Use struct annotation_line as a browser::offsets array entry.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20171011150158.11895-31-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Jiri Olsa [Mon, 6 Nov 2017 10:56:17 +0000 (11:56 +0100)]
perf annotate browser: Change selection to struct annotation_line
Use struct annotation_line as a browser::selection.
We want to be able to use the annotate_browser for all sorts of source
data, so it needs to be able to work over the generic struct
annotation_line.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20171106105617.GC20858@krava
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Jiri Olsa [Mon, 6 Nov 2017 10:55:52 +0000 (11:55 +0100)]
perf annotate browser: Rename disasm_line__browser to browser_line
Rename disasm_line__browser function to browser_line, because the browser got
generic and is no longer disasm specific.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20171106105552.GB20858@krava
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Jiri Olsa [Mon, 6 Nov 2017 10:55:36 +0000 (11:55 +0100)]
perf annotate browser: Rename struct browser_disasm_line to browser_line
Rename struct browser_disasm_line to browser_line, because the browser
operates now on generic lines and no longer on disasm lines.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20171106105536.GA20858@krava
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Jiri Olsa [Wed, 11 Oct 2017 15:01:49 +0000 (17:01 +0200)]
perf annotate browser: Do not pass nr_events in disasm_rb_tree__insert
We now keep samples_nr in struct annotation_line, so there's no need to
pass nr_events to disasm_rb_tree__insert function.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20171011150158.11895-27-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Jiri Olsa [Wed, 11 Oct 2017 15:01:48 +0000 (17:01 +0200)]
perf annotate browser: Use samples data from struct annotation_line
We now carry the data in 'struct annotation_line', so using it instead
of samples from 'struct browser_disasm_line' and removing it and its
setup.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20171011150158.11895-26-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Jiri Olsa [Wed, 11 Oct 2017 15:01:47 +0000 (17:01 +0200)]
perf annotate: Factor annotation_line__print from disasm_line__print
Move generic annotation line display code into annotation_line__print
function.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20171011150158.11895-25-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Jiri Olsa [Wed, 11 Oct 2017 15:01:46 +0000 (17:01 +0200)]
perf annotate: Add annotation_line__print function
Separating struct annotation_line display function, it will hold the
generic line display code.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20171011150158.11895-24-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Jiri Olsa [Wed, 11 Oct 2017 15:01:45 +0000 (17:01 +0200)]
perf annotate: Remove struct source_line
Remove struct source_line*, no longer needed.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20171011150158.11895-23-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Jiri Olsa [Wed, 11 Oct 2017 15:01:44 +0000 (17:01 +0200)]
perf annotate: Remove disasm__calc_percent function
Remove disasm__calc_percent() function, because it's no longer needed.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20171011150158.11895-22-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Jiri Olsa [Wed, 11 Oct 2017 15:01:43 +0000 (17:01 +0200)]
perf annotate: Remove disasm__calc_percent() from annotate_browser__calc_percent()
Remove disasm__calc_percent() from annotate_browser__calc_percent(),
because we already have the data calculated in struct annotation_line.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20171011150158.11895-21-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Jiri Olsa [Wed, 11 Oct 2017 15:01:42 +0000 (17:01 +0200)]
perf annotate: Remove disasm__calc_percent() from disasm_line__print()
Remove disasm__calc_percent() from disasm_line__print(), because we
already have the data calculated in struct annotation_line.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20171011150158.11895-20-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Jiri Olsa [Wed, 11 Oct 2017 15:01:41 +0000 (17:01 +0200)]
perf annotate: Add symbol__calc_lines function
Replace symbol__get_source_line() with symbol__calc_lines(), which
calculates the source line tree over the struct annotation_line.
This will allow us to remove redundant struct source_line in following
patches.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20171011150158.11895-19-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Jiri Olsa [Wed, 11 Oct 2017 15:01:40 +0000 (17:01 +0200)]
perf annotate: Add symbol__calc_percent function
Add symbol__calc_percent function, that calculates annotation data for
symbol and put the data in the struct annotation_line::samples array.
Committer notes:
Made symbol__calc_percent non static to be used in the next two patches,
which will get some fixups from jolsa, doing it this way to keep this
bisectable.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20171011150158.11895-18-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Jiri Olsa [Wed, 11 Oct 2017 15:01:39 +0000 (17:01 +0200)]
perf annotate: Add samples into struct annotation_line
Add samples array into struct annotation_line to hold the annotation
data. The data is populated in the following patches.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20171011150158.11895-17-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Jiri Olsa [Wed, 11 Oct 2017 15:01:38 +0000 (17:01 +0200)]
perf annotate: Add annotated_source__purge function
Mov disasm__purge() to annotated_source__purge() to make it work over a
generic struct annotation_line.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20171011150158.11895-16-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Jiri Olsa [Wed, 11 Oct 2017 15:01:37 +0000 (17:01 +0200)]
perf annotate: Add annotation_line__(new|delete) functions
Changing the way the annotation lines are allocated and adding
annotation_line__(new|delete) functions to deal with this.
Before the allocation schema was as follows:
-----------------------------------------------------------
struct disasm_line | struct annotation_line | private space
-----------------------------------------------------------
Where the private space is used in TUI code to store computed
annotation data for events. The stdio code computes the data
on the fly.
The goal is to compute and store annotation line's data directly
in the struct annotation_line itself, so this patch changes the
line allocation schema as follows:
------------------------------------------------------------
privsize space | struct disasm_line | struct annotation_line
------------------------------------------------------------
Moving struct annotation_line to the end, because in following
changes we will move here the non-fixed length event's data.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20171011150158.11895-15-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Jiri Olsa [Wed, 11 Oct 2017 15:01:36 +0000 (17:01 +0200)]
perf annotate: Move rb_node to struct annotation_line
Move rb_node to struct annotation_line to make struct annotation_line
the rb tree node for sorted lines used in both stdio and TUI code.
This way we can unite the sorted lines lines codes for both TUI and
stdio in the following patches.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20171011150158.11895-14-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Jiri Olsa [Wed, 11 Oct 2017 15:01:35 +0000 (17:01 +0200)]
perf annotate: Add annotation_line__add function
Rename disasm__add() into annotation_line__add() to make it work over a
generic struct annotation_line.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20171011150158.11895-13-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Jiri Olsa [Wed, 11 Oct 2017 15:01:34 +0000 (17:01 +0200)]
perf annotate: Add annotation_line__next function
Rename disasm__get_next_ip_line() to annotation_line__next() to make it
work over a generic struct annotation_line.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20171011150158.11895-12-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Jiri Olsa [Wed, 11 Oct 2017 15:01:33 +0000 (17:01 +0200)]
perf annotate: Add evsel into struct annotation_line_args
Add evsel into struct annotate_args to reduce the number of arguments
that need to travel all the way to line allocation.
This change also allow us to move the arch name initialization under
symbol__annotate function.
Link: http://lkml.kernel.org/n/tip-a9ok53rrgt1s5e8uglyvy6qt@git.kernel.org
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20171011150158.11895-11-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Jiri Olsa [Wed, 11 Oct 2017 15:01:32 +0000 (17:01 +0200)]
perf annotate: Add offset/line/line_nr into struct annotate_args
Add offset/line/line_nr into struct annotate_args to reduce the number
of arguments that need to travel all the way to line allocation.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20171011150158.11895-10-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Jiri Olsa [Wed, 11 Oct 2017 15:01:31 +0000 (17:01 +0200)]
perf annotate: Add map into struct annotate_args
Add map into struct annotate_args to reduce the number of arguments
that need to travel all the way to line allocation.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20171011150158.11895-9-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Jiri Olsa [Wed, 11 Oct 2017 15:01:30 +0000 (17:01 +0200)]
perf annotate: Add arch into struct annotate_args
Add arch into struct annotate_args to reduce the number of arguments
that need to travel all the way to line allocation.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20171011150158.11895-8-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Jiri Olsa [Wed, 11 Oct 2017 15:01:29 +0000 (17:01 +0200)]
perf annotate: Add struct annotate_args
Adding struct annotate_args to reduce the number of arguments, that need
to travel all the way to line allocation. This makes the code easier to
read and ease up the changes for following patches.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20171011150158.11895-7-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Jiri Olsa [Wed, 11 Oct 2017 15:01:28 +0000 (17:01 +0200)]
perf annotate: Add symbol__annotate function
Add symbol__annotate function to have generic annotation function to be
called for all annotation sources.
It calls the generic annotation init and then the specific annotation
data retrieval function.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20171011150158.11895-6-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Jiri Olsa [Wed, 11 Oct 2017 15:01:27 +0000 (17:01 +0200)]
perf annotate: Move ipc/cycles into annotation_line struct
Move ipc/cycles into annotation_line struct to be used as generic
members for any annotation source.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20171011150158.11895-5-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Jiri Olsa [Wed, 11 Oct 2017 15:01:26 +0000 (17:01 +0200)]
perf annotate: Move line/offset into annotation_line struct
Move the line/line_nr/offset menbers to the annotation_line struct to be
used as generic members for any annotation source.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20171011150158.11895-4-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Jiri Olsa [Wed, 11 Oct 2017 15:01:25 +0000 (17:01 +0200)]
perf annotate: Add annotation_line struct
In order to make the annotation support generic, addadding 'struct
annotation_line', which will hold generic data common to annotation
sources (such as the one for python scripts, coming on upcoming
patches).
Having this, we can add different annotation line support other than
objdump disasm.
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/20171011150158.11895-3-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Arnaldo Carvalho de Melo [Fri, 3 Nov 2017 18:34:34 +0000 (15:34 -0300)]
perf record: Generate PERF_RECORD_{MMAP,COMM,EXEC} with --delay
When we use an initial delay, e.g.: 'perf record --delay 1000', we do not
enable the events until that delay has passed after we started the workload,
including the tracking event, i.e. the one for which we have attr.mmap, etc,
enabled to ask the kernel to generate the PERF_RECORD_{MMAP,COMM,EXEC} metadata
events that will then allow us to resolve addresses in samples to the map, dso
and symbol. There will be a shadow that even synthesizing samples won't cover,
i.e. the workload that we start and other processes forking while we
wait for the initial delay to expire.
So use a dummy event to be the tracking one and make it be enabled on exec.
Before:
# perf record --delay 1000 stress --cpu 1 --timeout 5
stress: info: [9029] dispatching hogs: 1 cpu, 0 io, 0 vm, 0 hdd
stress: info: [9029] successful run completed in 5s
[ perf record: Woken up 3 times to write data ]
[ perf record: Captured and wrote 0.624 MB perf.data (15908 samples) ]
# perf script | head
:9031 9031 32001.826888: 1 cycles:ppp:
ffffffff831aa30d event_function (/lib/modules/4.14.0-rc6+/build/vmlinux)
:9031 9031 32001.826893: 1 cycles:ppp:
ffffffff8300d1a0 intel_bts_enable_local (/lib/modules/4.14.0-rc6+/build/vmlinux)
:9031 9031 32001.826895: 7 cycles:ppp:
ffffffff83023870 sched_clock (/lib/modules/4.14.0-rc6+/build/vmlinux)
:9031 9031 32001.826897: 103 cycles:ppp:
ffffffff8300c331 intel_pmu_handle_irq (/lib/modules/4.14.0-rc6+/build/vmlinux)
:9031 9031 32001.826899: 1615 cycles:ppp:
ffffffff830231f8 native_sched_clock (/lib/modules/4.14.0-rc6+/build/vmlinux)
:9031 9031 32001.826902: 26724 cycles:ppp:
ffffffff8384c6a7 native_irq_return_iret (/lib/modules/4.14.0-rc6+/build/vmlinux)
:9031 9031 32001.826913: 329739 cycles:ppp:
7fb2a5410932 [unknown] ([unknown])
:9031 9031 32001.827033: 1225451 cycles:ppp:
7fb2a5410930 [unknown] ([unknown])
:9031 9031 32001.827474: 1391725 cycles:ppp:
7fb2a5410930 [unknown] ([unknown])
:9031 9031 32001.827978: 1233697 cycles:ppp:
7fb2a5410928 [unknown] ([unknown])
#
After:
# perf record --delay 1000 stress --cpu 1 --timeout 5
stress: info: [9741] dispatching hogs: 1 cpu, 0 io, 0 vm, 0 hdd
stress: info: [9741] successful run completed in 5s
[ perf record: Woken up 3 times to write data ]
[ perf record: Captured and wrote 0.751 MB perf.data (15976 samples) ]
# perf script | head
stress 9742 32110.959106: 1 cycles:ppp:
ffffffff831b26f6 __perf_event_task_sched_in (/lib/modules/4.14.0-rc6+/build/vmlinux)
stress 9742 32110.959110: 1 cycles:ppp:
ffffffff8300c2e9 intel_pmu_handle_irq (/lib/modules/4.14.0-rc6+/build/vmlinux)
stress 9742 32110.959112: 7 cycles:ppp:
ffffffff830231e0 native_sched_clock (/lib/modules/4.14.0-rc6+/build/vmlinux)
stress 9742 32110.959115: 101 cycles:ppp:
ffffffff83023870 sched_clock (/lib/modules/4.14.0-rc6+/build/vmlinux)
stress 9742 32110.959117: 1533 cycles:ppp:
ffffffff830231f8 native_sched_clock (/lib/modules/4.14.0-rc6+/build/vmlinux)
stress 9742 32110.959119: 23992 cycles:ppp:
ffffffff831b0900 ctx_sched_in (/lib/modules/4.14.0-rc6+/build/vmlinux)
stress 9742 32110.959129: 329406 cycles:ppp:
7f4b1b661930 __random_r (/usr/lib64/libc-2.25.so)
stress 9742 32110.959249: 1288322 cycles:ppp:
5566e1e7cbc9 hogcpu (/usr/bin/stress)
stress 9742 32110.959712: 1464046 cycles:ppp:
7f4b1b66179e __random (/usr/lib64/libc-2.25.so)
stress 9742 32110.960241: 1266918 cycles:ppp:
7f4b1b66195b __random_r (/usr/lib64/libc-2.25.so)
#
Reported-by: Bram Stolk <b.stolk@gmail.com>
Tested-by: Bram Stolk <b.stolk@gmail.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Fixes:
6619a53ef757 ("perf record: Add --initial-delay option")
Link: http://lkml.kernel.org/n/tip-nrdfchshqxf7diszhxcecqb9@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Arnaldo Carvalho de Melo [Fri, 3 Nov 2017 18:13:29 +0000 (15:13 -0300)]
perf evlist: Set the correct idx when adding dummy events
The evsel->idx field is used mainly to access the right bucket in
per-event arrays such as the annotation ones, but also to set
evsel->tracking, that in turn will decide what of the events will ask
for PERF_RECORD_{MMAP,COMM,EXEC} to be generated, i.e. which
perf_event_attr will have its mmap, etc fields set.
When we were adding the "dummy" event using perf_evlist__add_dummy() we
were not setting it correctly, which could result in multiple tracking
events.
Now that I'll try using a dummy event to be the tracking one when using
'perf record --delay', i.e. when we process the --delay
setting we may already have the evlist set up, like with:
perf record -e cycles,instructions --delay 1000 ./workload
We will need to add a "dummy" event, then reset evsel->tracking for the
first event, "cycles", and set it instead to the dummy one, and also
setting its attr.enable_on_exec, so that we get the PERF_RECORD_MMAP,
etc metadata events while waiting to enable the explicitely requested
events, so lets get this straight and set the right evsel->idx.
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Bram Stolk <b.stolk@gmail.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/n/tip-nrdfchshqxf7diszhxcecqb9@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Arnaldo Carvalho de Melo [Mon, 13 Nov 2017 12:39:12 +0000 (09:39 -0300)]
Merge remote-tracking branch 'torvalds/master' into perf/core
To pick up fixes.
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Ingo Molnar [Mon, 13 Nov 2017 06:59:10 +0000 (07:59 +0100)]
kprobes: Don't spam the build log with deprecation warnings
The jprobes APIs are deprecated - but are still in occasional use for code that
few people seem to care about, so stop generating deprecation warnings.
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Linus Torvalds [Mon, 13 Nov 2017 02:44:23 +0000 (18:44 -0800)]
/proc/module: use the same logic as /proc/kallsyms for address exposure
The (alleged) users of the module addresses are the same: kernel
profiling.
So just expose the same helper and format macros, and unify the logic.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Linus Torvalds [Mon, 13 Nov 2017 01:00:53 +0000 (17:00 -0800)]
modules: make sysfs attribute files readable by owner only
This code goes back to the historical bitkeeper tree commit
3f7b0672086
("Module section offsets in /sys/module"), where Jonathan Corbet wanted
to show people how to debug loadable modules.
See
https://lwn.net/Articles/88052/
from June 2004.
To expose the required load address information, Jonathan added the
sections subdirectory for every module in /sys/modules, and made them
S_IRUGO - readable by everybody.
It was a more innocent time, plus those S_IRxxx macro names are a lot
more confusing than the octal numbers are, so maybe it wasn't even
intentional. But here we are, thirteen years later, and I'll just change
it to S_IRUSR instead.
Let's see if anybody even notices.
Cc: Jonathan Corbet <corbet@lwn.net>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Linus Torvalds [Mon, 13 Nov 2017 00:33:33 +0000 (16:33 -0800)]
Merge branch 'kallsyms-restrictions'
Merge /proc/kallsyms pointer value restrictions.
Instead of using %pK, and making it about root access (at the wrong
time, no less), make the whole choice of whether to show the actual
pointer value be very explicit to the kallsyms code.
In particular, we can now default to not doing so, and yet avoid
annoying kernel profiling by actually looking at whether kernel
profiling is allowed or not (by default it is not).
This is all mostly preparation for the real "let's stop leaking kernel
addresses" work that Tobin Harding is working on.
Small steps.
* kallsyms-restrictions:
stop using '%pK' for /proc/kallsyms pointer values
Randy Dunlap [Sun, 12 Nov 2017 19:21:45 +0000 (11:21 -0800)]
modpost: detect modules without a MODULE_LICENSE
Partially revert commit
2fa365682943 ("kbuild: soften MODULE_LICENSE
check") so that modpost detects modules that do not have a
MODULE_LICENSE.
Sam's commit also changed the fatal error to a warning, which I am
leaving as is.
This gives advance notice of when a module has no license and will taint
the kernel if the module is loaded.
This produces the following warnings on x86_64 allmodconfig:
MODPOST 6520 modules
WARNING: modpost: missing MODULE_LICENSE() in drivers/auxdisplay/img-ascii-lcd.o
WARNING: modpost: missing MODULE_LICENSE() in drivers/gpio/gpio-ath79.o
WARNING: modpost: missing MODULE_LICENSE() in drivers/gpio/gpio-iop.o
WARNING: modpost: missing MODULE_LICENSE() in drivers/iio/accel/kxsd9-i2c.o
WARNING: modpost: missing MODULE_LICENSE() in drivers/iio/adc/qcom-vadc-common.o
WARNING: modpost: missing MODULE_LICENSE() in drivers/media/platform/mtk-vcodec/mtk-vcodec-common.o
WARNING: modpost: missing MODULE_LICENSE() in drivers/media/platform/soc_camera/soc_scale_crop.o
WARNING: modpost: missing MODULE_LICENSE() in drivers/mtd/nand/denali_pci.o
WARNING: modpost: missing MODULE_LICENSE() in drivers/net/phy/cortina.o
WARNING: modpost: missing MODULE_LICENSE() in drivers/pinctrl/pxa/pinctrl-pxa2xx.o
WARNING: modpost: missing MODULE_LICENSE() in drivers/power/reset/zx-reboot.o
WARNING: modpost: missing MODULE_LICENSE() in drivers/rpmsg/qcom_glink_native.o
WARNING: modpost: missing MODULE_LICENSE() in drivers/staging/comedi/drivers/ni_atmio.o
WARNING: modpost: missing MODULE_LICENSE() in net/9p/9pnet_xen.o
WARNING: modpost: missing MODULE_LICENSE() in sound/soc/codecs/snd-soc-pcm512x-spi.o
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Linus Torvalds [Sun, 12 Nov 2017 18:46:13 +0000 (10:46 -0800)]
Linux 4.14
Linus Torvalds [Sun, 12 Nov 2017 18:12:41 +0000 (10:12 -0800)]
Merge branch 'x86-urgent-for-linus' of git://git./linux/kernel/git/tip/tip
Pull x86 fixes from Thomas Gleixner:
"A set of small fixes:
- make KGDB work again which got broken by the conversion of WARN()
to #UD. The WARN fixup needs to run before the notifier callchain,
otherwise KGDB tries to handle it and crashes.
- disable KASAN in the ORC unwinder to prevent false positive KASAN
warnings
- prevent default mapping above 47bit when 5 level page tables are
enabled
- make the delay calibration optimization work correctly, which had
the conditionals the wrong way around and was operating on data
which was not yet updated.
- remove the bogus X86_TRAP_BP trap init from the default IDT init
table, which broke 32bit int3 handling by overwriting the correct
int3 setup.
- replace this_cpu* with boot_cpu_data access in the preemptible
oprofile init code"
* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/debug: Handle warnings before the notifier chain, to fix KGDB crash
x86/mm: Fix ELF_ET_DYN_BASE for 5-level paging
x86/idt: Remove X86_TRAP_BP initialization in idt_setup_traps()
x86/oprofile/ppro: Do not use __this_cpu*() in preemptible context
x86/unwind: Disable KASAN checking in the ORC unwinder
x86/smpboot: Make optimization of delay calibration work correctly
Linus Torvalds [Sun, 12 Nov 2017 17:43:53 +0000 (09:43 -0800)]
Merge branch 'perf-urgent-for-linus' of git://git./linux/kernel/git/tip/tip
Pull perf tool fixes from Thomas Gleixner:
"A small set of fixes for perf tool:
- synchronize the i915 drm header to avoid the 'out of date' warning
- make sure that perf trace cleans up its temporary files on exit
- unbreak the build with newer flex versions
- add missing braces in the eBPF parsing rules"
* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
tooling/headers: Sync the tools/include/uapi/drm/i915_drm.h UAPI header
perf trace: Call machine__exit() at exit
perf tools: Fix eBPF event specification parsing
perf tools: Add "reject" option for parse-events.l
Linus Torvalds [Sat, 11 Nov 2017 17:10:39 +0000 (09:10 -0800)]
Merge git://git./linux/kernel/git/davem/net
Pull networking fixes from David Miller:
1) Use after free in vlan, from Cong Wang.
2) Handle NAPI poll with a zero budget properly in mlx5 driver, from
Saeed Mahameed.
3) If DMA mapping fails in mlx5 driver, NULL out page, from Inbar
Karmy.
4) Handle overrun in RX FIFO of sun4i CAN driver, from Gerhard
Bertelsmann.
5) Missing return in mdb and vlan prepare phase of DSA layer, from
Vivien Didelot.
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net:
vlan: fix a use-after-free in vlan_device_event()
net: dsa: return after vlan prepare phase
net: dsa: return after mdb prepare phase
can: ifi: Fix transmitter delay calculation
tcp: fix tcp_fastretrans_alert warning
tcp: gso: avoid refcount_t warning from tcp_gso_segment()
can: peak: Add support for new PCIe/M2 CAN FD interfaces
can: sun4i: handle overrun in RX FIFO
can: c_can: don't indicate triple sampling support for D_CAN
net/mlx5e: Increase Striding RQ minimum size limit to 4 multi-packet WQEs
net/mlx5e: Set page to null in case dma mapping fails
net/mlx5e: Fix napi poll with zero budget
net/mlx5: Cancel health poll before sending panic teardown command
net/mlx5: Loop over temp list to release delay events
rds: ib: Fix NULL pointer dereference in debug code
David S. Miller [Sat, 11 Nov 2017 12:52:01 +0000 (21:52 +0900)]
Merge tag 'linux-can-fixes-for-4.14-
20171110' of git://git./linux/kernel/git/mkl/linux-can
Marc Kleine-Budde says:
====================
pull-request: can 2017-11-10
this is a pull request for net/master.
The first patch by Richard Schütz for the c_can driver removes the false
indication to support triple sampling for d_can. Gerhard Bertelsmann's
patch for the sun4i driver improves the RX overrun handling. The patch
by Stephane Grosjean for the peak_canfd driver adds the PCI ids for
various new PCIe/M2 interfaces. Marek Vasut's patch for the ifi driver
fix transmitter delay calculation.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
David S. Miller [Sat, 11 Nov 2017 10:40:05 +0000 (19:40 +0900)]
Merge tag 'mlx5-fixes-2017-11-08' of git://git./linux/kernel/git/saeed/linux
Saeed Mahameed says:
====================
Mellanox, mlx5 fixes 2017-11-08
The following series includes some fixes for mlx5 core and etherent
driver.
Sorry for the late submission but as you can see i have some very
critical fixes below that i would like them merged into this RC.
Please pull and let me know if there is any problem.
For -stable:
('net/mlx5e: Set page to null in case dma mapping fails') kernels >= 4.13
('net/mlx5: FPGA, return -EINVAL if size is zero') kernels >= 4.13
('net/mlx5: Cancel health poll before sending panic teardown command') kernels >= 4.13
V1->V2:
- Fix Reviewed-by tag of the 2nd patch.
- Drop the FPGA 0 size fix, it needs some more change log info.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Cong Wang [Fri, 10 Nov 2017 00:43:13 +0000 (16:43 -0800)]
vlan: fix a use-after-free in vlan_device_event()
After refcnt reaches zero, vlan_vid_del() could free
dev->vlan_info via RCU:
RCU_INIT_POINTER(dev->vlan_info, NULL);
call_rcu(&vlan_info->rcu, vlan_info_rcu_free);
However, the pointer 'grp' still points to that memory
since it is set before vlan_vid_del():
vlan_info = rtnl_dereference(dev->vlan_info);
if (!vlan_info)
goto out;
grp = &vlan_info->grp;
Depends on when that RCU callback is scheduled, we could
trigger a use-after-free in vlan_group_for_each_dev()
right following this vlan_vid_del().
Fix it by moving vlan_vid_del() before setting grp. This
is also symmetric to the vlan_vid_add() we call in
vlan_device_event().
Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Fixes:
efc73f4bbc23 ("net: Fix memory leak - vlan_info struct")
Cc: Alexander Duyck <alexander.duyck@gmail.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Girish Moodalbail <girish.moodalbail@oracle.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Reviewed-by: Girish Moodalbail <girish.moodalbail@oracle.com>
Tested-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Ingo Molnar [Sat, 11 Nov 2017 08:06:57 +0000 (09:06 +0100)]
tooling/headers: Sync the tools/include/uapi/drm/i915_drm.h UAPI header
Last minute upstream update to one of the UAPI headers - sync it with tooling,
to address this warning:
Warning: Kernel ABI header at 'tools/include/uapi/drm/i915_drm.h' differs from latest version at 'include/uapi/drm/i915_drm.h'
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Ingo Molnar [Sat, 11 Nov 2017 08:03:59 +0000 (09:03 +0100)]
Merge branch 'perf/urgent' of git://git./linux/kernel/git/acme/linux into perf/urgent
Pull perf tooling fixes from Arnaldo Carvalho de Melo.
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Vivien Didelot [Wed, 8 Nov 2017 15:50:10 +0000 (10:50 -0500)]
net: dsa: return after vlan prepare phase
The current code does not return after successfully preparing the VLAN
addition on every ports member of a it. Fix this.
Fixes:
1ca4aa9cd4cc ("net: dsa: check VLAN capability of every switch")
Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
Vivien Didelot [Wed, 8 Nov 2017 15:49:56 +0000 (10:49 -0500)]
net: dsa: return after mdb prepare phase
The current code does not return after successfully preparing the MDB
addition on every ports member of a multicast group. Fix this.
Fixes:
a1a6b7ea7f2d ("net: dsa: add cross-chip multicast support")
Reported-by: Egil Hjelmeland <privat@egil-hjelmeland.no>
Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
Linus Torvalds [Fri, 10 Nov 2017 22:18:24 +0000 (14:18 -0800)]
Merge tag 'ceph-for-4.14-rc9' of git://github.com/ceph/ceph-client
Pull ceph gix from Ilya Dryomov:
"Memory allocation flags fix, marked for stable"
* tag 'ceph-for-4.14-rc9' of git://github.com/ceph/ceph-client:
rbd: use GFP_NOIO for parent stat and data requests
Linus Torvalds [Fri, 10 Nov 2017 22:14:23 +0000 (14:14 -0800)]
Merge branch 'for-linus' of git://git./linux/kernel/git/dtor/input
Pull input layer updates from Dmitry Torokhov:
- a new ACPI ID for Elan touchpad found in yet another Ideapad model
- Synaptics RMI4 will allow binding to controllers reporting SMB
version 3 (note that we are not adding any new ACPI IDs to the
Synaptics PS/2 drover so unless user explicitly enables intertouch
support there is no user-visible change)
- a fixup to TSC 2004/5 touchscreen driver to mark input devices as
"direct" to help userspace identify the type of device they are
dealing with
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
Input: synaptics-rmi4 - RMI4 can also use SMBUS version 3
Input: tsc200x-core - set INPUT_PROP_DIRECT
Input: elan_i2c - add ELAN060C to the ACPI table
Linus Torvalds [Fri, 10 Nov 2017 20:24:42 +0000 (12:24 -0800)]
Merge tag 'for-linus' of git://git./virt/kvm/kvm
Pull KVM fix from Radim Krčmář:
"Fix PPC HV host crash that can occur as a result of resizing the guest
hashed page table"
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
KVM: PPC: Book3S HV: Fix exclusion between HPT resizing and other HPT updates
Linus Torvalds [Fri, 10 Nov 2017 20:21:15 +0000 (12:21 -0800)]
Merge tag 'mips_fixes_4.14_2' of git://git./linux/kernel/git/jhogan/mips
Pull MIPS fixes from James Hogan:
"A final few MIPS fixes for 4.14:
- fix BMIPS NULL pointer dereference (4.7)
- fix AR7 early GPIO init allocation failure (3.19)
- fix dead serial output on certain AR7 platforms (2.6.35)"
* tag 'mips_fixes_4.14_2' of git://git.kernel.org/pub/scm/linux/kernel/git/jhogan/mips:
MIPS: AR7: Ensure that serial ports are properly set up
MIPS: AR7: Defer registration of GPIO
MIPS: BMIPS: Fix missing cbr address
Maciej W. Rozycki [Fri, 10 Nov 2017 20:05:24 +0000 (20:05 +0000)]
.mailmap: Add Maciej W. Rozycki's Imagination e-mail address
Following my recent transition from Imagination Technologies to the=20
reincarnated MIPS company add a .mailmap mapping for my work address,
so that `scripts/get_maintainer.pl' gets it right for past commits.
Signed-off-by: Maciej W. Rozycki <macro@mips.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Linus Torvalds [Fri, 10 Nov 2017 19:19:11 +0000 (11:19 -0800)]
Revert "x86: CPU: Fix up "cpu MHz" in /proc/cpuinfo"
This reverts commit
941f5f0f6ef5338814145cf2b813cf1f98873e2f.
Sadly, it turns out that we really can't just do the cross-CPU IPI to
all CPU's to get their proper frequencies, because it's much too
expensive on systems with lots of cores.
So we'll have to revert this for now, and revisit it using a smarter
model (probably doing one system-wide IPI at open time, and doing all
the frequency calculations in parallel).
Reported-by: WANG Chao <chao.wang@ucloud.cn>
Reported-by: Ingo Molnar <mingo@kernel.org>
Cc: Rafael J Wysocki <rafael.j.wysocki@intel.com>
Cc: stable@kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Linus Torvalds [Fri, 10 Nov 2017 17:59:41 +0000 (09:59 -0800)]
Merge tag 'drm-fixes-for-v4.14-rc9' of git://people.freedesktop.org/~airlied/linux
Pull drm fixes from Dave Airlie:
"Last few patches to wrap up.
Two i915 fixes that are on their way to stable, one vmware black
screen bug, and one const patch that I was going to drop, but it was
clearly a pretty safe one liner"
* tag 'drm-fixes-for-v4.14-rc9' of git://people.freedesktop.org/~airlied/linux:
drm/i915: Deconstruct struct sgt_dma initialiser
drm/i915: Reject unknown syncobj flags
drm/vmwgfx: Fix Ubuntu 17.10 Wayland black screen issue
drm/vmwgfx: constify vmw_fence_ops
Marek Vasut [Fri, 10 Nov 2017 10:22:39 +0000 (11:22 +0100)]
can: ifi: Fix transmitter delay calculation
The CANFD transmitter delay calculation formula was updated in the
latest software drop from IFI and improves the behavior of the IFI
CANFD core during bitrate switching. Use the new formula to improve
stability of the CANFD operation.
Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Markus Marb <markus@marb.org>
Cc: linux-stable <stable@vger.kernel.org>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Yuchung Cheng [Tue, 7 Nov 2017 23:33:43 +0000 (15:33 -0800)]
tcp: fix tcp_fastretrans_alert warning
This patch fixes the cause of an WARNING indicatng TCP has pending
retransmission in Open state in tcp_fastretrans_alert().
The root cause is a bad interaction between path mtu probing,
if enabled, and the RACK loss detection. Upong receiving a SACK
above the sequence of the MTU probing packet, RACK could mark the
probe packet lost in tcp_fastretrans_alert(), prior to calling
tcp_simple_retransmit().
tcp_simple_retransmit() only enters Loss state if it newly marks
the probe packet lost. If the probe packet is already identified as
lost by RACK, the sender remains in Open state with some packets
marked lost and retransmitted. Then the next SACK would trigger
the warning. The likely scenario is that the probe packet was
lost due to its size or network congestion. The actual impact of
this warning is small by potentially entering fast recovery an
ACK later.
The simple fix is always entering recovery (Loss) state if some
packet is marked lost during path MTU probing.
Fixes:
a0370b3f3f2c ("tcp: enable RACK loss detection to trigger recovery")
Reported-by: Oleksandr Natalenko <oleksandr@natalenko.name>
Reported-by: Alexei Starovoitov <alexei.starovoitov@gmail.com>
Reported-by: Roman Gushchin <guro@fb.com>
Signed-off-by: Yuchung Cheng <ycheng@google.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Acked-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Eric Dumazet [Tue, 7 Nov 2017 23:15:04 +0000 (15:15 -0800)]
tcp: gso: avoid refcount_t warning from tcp_gso_segment()
When a GSO skb of truesize O is segmented into 2 new skbs of truesize N1
and N2, we want to transfer socket ownership to the new fresh skbs.
In order to avoid expensive atomic operations on a cache line subject to
cache bouncing, we replace the sequence :
refcount_add(N1, &sk->sk_wmem_alloc);
refcount_add(N2, &sk->sk_wmem_alloc); // repeated by number of segments
refcount_sub(O, &sk->sk_wmem_alloc);
by a single
refcount_add(sum_of(N) - O, &sk->sk_wmem_alloc);
Problem is :
In some pathological cases, sum(N) - O might be a negative number, and
syzkaller bot was apparently able to trigger this trace [1]
atomic_t was ok with this construct, but we need to take care of the
negative delta with refcount_t
[1]
refcount_t: saturated; leaking memory.
------------[ cut here ]------------
WARNING: CPU: 0 PID: 8404 at lib/refcount.c:77 refcount_add_not_zero+0x198/0x200 lib/refcount.c:77
Kernel panic - not syncing: panic_on_warn set ...
CPU: 0 PID: 8404 Comm: syz-executor2 Not tainted 4.14.0-rc5-mm1+ #20
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:16 [inline]
dump_stack+0x194/0x257 lib/dump_stack.c:52
panic+0x1e4/0x41c kernel/panic.c:183
__warn+0x1c4/0x1e0 kernel/panic.c:546
report_bug+0x211/0x2d0 lib/bug.c:183
fixup_bug+0x40/0x90 arch/x86/kernel/traps.c:177
do_trap_no_signal arch/x86/kernel/traps.c:211 [inline]
do_trap+0x260/0x390 arch/x86/kernel/traps.c:260
do_error_trap+0x120/0x390 arch/x86/kernel/traps.c:297
do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:310
invalid_op+0x18/0x20 arch/x86/entry/entry_64.S:905
RIP: 0010:refcount_add_not_zero+0x198/0x200 lib/refcount.c:77
RSP: 0018:
ffff8801c606e3a0 EFLAGS:
00010282
RAX:
0000000000000026 RBX:
0000000000001401 RCX:
0000000000000000
RDX:
0000000000000026 RSI:
ffffc900036fc000 RDI:
ffffed0038c0dc68
RBP:
ffff8801c606e430 R08:
0000000000000001 R09:
0000000000000000
R10:
ffff8801d97f5eba R11:
0000000000000000 R12:
ffff8801d5acf73c
R13:
1ffff10038c0dc75 R14:
00000000ffffffff R15:
00000000fffff72f
refcount_add+0x1b/0x60 lib/refcount.c:101
tcp_gso_segment+0x10d0/0x16b0 net/ipv4/tcp_offload.c:155
tcp4_gso_segment+0xd4/0x310 net/ipv4/tcp_offload.c:51
inet_gso_segment+0x60c/0x11c0 net/ipv4/af_inet.c:1271
skb_mac_gso_segment+0x33f/0x660 net/core/dev.c:2749
__skb_gso_segment+0x35f/0x7f0 net/core/dev.c:2821
skb_gso_segment include/linux/netdevice.h:3971 [inline]
validate_xmit_skb+0x4ba/0xb20 net/core/dev.c:3074
__dev_queue_xmit+0xe49/0x2070 net/core/dev.c:3497
dev_queue_xmit+0x17/0x20 net/core/dev.c:3538
neigh_hh_output include/net/neighbour.h:471 [inline]
neigh_output include/net/neighbour.h:479 [inline]
ip_finish_output2+0xece/0x1460 net/ipv4/ip_output.c:229
ip_finish_output+0x85e/0xd10 net/ipv4/ip_output.c:317
NF_HOOK_COND include/linux/netfilter.h:238 [inline]
ip_output+0x1cc/0x860 net/ipv4/ip_output.c:405
dst_output include/net/dst.h:459 [inline]
ip_local_out+0x95/0x160 net/ipv4/ip_output.c:124
ip_queue_xmit+0x8c6/0x18e0 net/ipv4/ip_output.c:504
tcp_transmit_skb+0x1ab7/0x3840 net/ipv4/tcp_output.c:1137
tcp_write_xmit+0x663/0x4de0 net/ipv4/tcp_output.c:2341
__tcp_push_pending_frames+0xa0/0x250 net/ipv4/tcp_output.c:2513
tcp_push_pending_frames include/net/tcp.h:1722 [inline]
tcp_data_snd_check net/ipv4/tcp_input.c:5050 [inline]
tcp_rcv_established+0x8c7/0x18a0 net/ipv4/tcp_input.c:5497
tcp_v4_do_rcv+0x2ab/0x7d0 net/ipv4/tcp_ipv4.c:1460
sk_backlog_rcv include/net/sock.h:909 [inline]
__release_sock+0x124/0x360 net/core/sock.c:2264
release_sock+0xa4/0x2a0 net/core/sock.c:2776
tcp_sendmsg+0x3a/0x50 net/ipv4/tcp.c:1462
inet_sendmsg+0x11f/0x5e0 net/ipv4/af_inet.c:763
sock_sendmsg_nosec net/socket.c:632 [inline]
sock_sendmsg+0xca/0x110 net/socket.c:642
___sys_sendmsg+0x31c/0x890 net/socket.c:2048
__sys_sendmmsg+0x1e6/0x5f0 net/socket.c:2138
Fixes:
14afee4b6092 ("net: convert sock.sk_wmem_alloc from atomic_t to refcount_t")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: syzbot <syzkaller@googlegroups.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Stephane Grosjean [Thu, 9 Nov 2017 13:42:14 +0000 (14:42 +0100)]
can: peak: Add support for new PCIe/M2 CAN FD interfaces
This adds support for the following PEAK-System CAN FD interfaces:
PCAN-cPCIe FD CAN FD Interface for cPCI Serial (2 or 4 channels)
PCAN-PCIe/104-Express CAN FD Interface for PCIe/104-Express (1, 2 or 4 ch.)
PCAN-miniPCIe FD CAN FD Interface for PCIe Mini (1, 2 or 4 channels)
PCAN-PCIe FD OEM CAN FD Interface for PCIe OEM version (1, 2 or 4 ch.)
PCAN-M.2 CAN FD Interface for M.2 (1 or 2 channels)
Like the PCAN-PCIe FD interface, all of these boards run the same IP Core
that is able to handle CAN FD (see also http://www.peak-system.com).
Signed-off-by: Stephane Grosjean <s.grosjean@peak-system.com>
Cc: linux-stable <stable@vger.kernel.org>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Gerhard Bertelsmann [Mon, 6 Nov 2017 17:16:56 +0000 (18:16 +0100)]
can: sun4i: handle overrun in RX FIFO
SUN4Is CAN IP has a 64 byte deep FIFO buffer. If the buffer is not
drained fast enough (overrun) it's getting mangled. Already received
frames are dropped - the data can't be restored.
Signed-off-by: Gerhard Bertelsmann <info@gerhard-bertelsmann.de>
Cc: linux-stable <stable@vger.kernel.org>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Richard Schütz [Sun, 29 Oct 2017 12:03:22 +0000 (13:03 +0100)]
can: c_can: don't indicate triple sampling support for D_CAN
The D_CAN controller doesn't provide a triple sampling mode, so don't set
the CAN_CTRLMODE_3_SAMPLES flag in ctrlmode_supported. Currently enabling
triple sampling is a no-op.
Signed-off-by: Richard Schütz <rschuetz@uni-koblenz.de>
Cc: linux-stable <stable@vger.kernel.org> # >= v3.6
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Alexander Shishkin [Mon, 24 Jul 2017 10:04:28 +0000 (13:04 +0300)]
x86/debug: Handle warnings before the notifier chain, to fix KGDB crash
Commit:
9a93848fe787 ("x86/debug: Implement __WARN() using UD0")
turned warnings into UD0, but the fixup code only runs after the
notify_die() chain. This is a problem, in particular, with kgdb,
which kicks in as if it was a BUG().
Fix this by running the fixup code before the notifier chain in
the invalid op handler path.
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Tested-by: Ilya Dryomov <idryomov@gmail.com>
Acked-by: Daniel Thompson <daniel.thompson@linaro.org>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Jason Wessel <jason.wessel@windriver.com>
Cc: Arjan van de Ven <arjan@linux.intel.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Richard Weinberger <richard.weinberger@gmail.com>
Cc: <stable@vger.kernel.org> # v4.12+
Link: http://lkml.kernel.org/r/20170724100428.19173-1-alexander.shishkin@linux.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Eugenia Emantayev [Thu, 12 Jan 2017 15:11:45 +0000 (17:11 +0200)]
net/mlx5e: Increase Striding RQ minimum size limit to 4 multi-packet WQEs
This is to prevent the case of working with a single MPWQE
(1 WQE is always reserved as RQ is linked-list).
When the WQE is fully consumed, HW should still have available buffer
in order not to drop packets.
Fixes:
461017cb006a ("net/mlx5e: Support RX multi-packet WQE (Striding RQ)")
Signed-off-by: Eugenia Emantayev <eugenia@mellanox.com>
Reviewed-by: Tariq Toukan <tariqt@mellanox.com>
Cc: kernel-team@fb.com
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Inbar Karmy [Sun, 15 Oct 2017 14:30:59 +0000 (17:30 +0300)]
net/mlx5e: Set page to null in case dma mapping fails
Currently, when dma mapping fails, put_page is called,
but the page is not set to null. Later, in the page_reuse treatment in
mlx5e_free_rx_descs(), mlx5e_page_release() is called for the second time,
improperly doing dma_unmap (for a non-mapped address) and an extra put_page.
Prevent this by nullifying the page pointer when dma_map fails.
Fixes:
accd58833237 ("net/mlx5e: Introduce RX Page-Reuse")
Signed-off-by: Inbar Karmy <inbark@mellanox.com>
Reviewed-by: Tariq Toukan <tariqt@mellanox.com>
Cc: kernel-team@fb.com
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
projects / platform / kernel / linux-rpi.git / log