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rcu: Make rcupreempt_trace.c look at offline CPUs
author
Paul E. McKenney
<paulmck@linux.vnet.ibm.com>
Sat, 15 Aug 2009 16:53:50 +0000
(09:53 -0700)
committer
Ingo Molnar
<mingo@elte.hu>
Sat, 15 Aug 2009 17:02:09 +0000
(19:02 +0200)
Given that offline CPUs can now have non-zero counters, we need
to dump counters for offline CPUs as well as for online CPUs.
Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: laijs@cn.fujitsu.com
Cc: dipankar@in.ibm.com
Cc: josht@linux.vnet.ibm.com
Cc: akpm@linux-foundation.org
Cc: mathieu.desnoyers@polymtl.ca
Cc: dvhltc@us.ibm.com
Cc: niv@us.ibm.com
Cc: peterz@infradead.org
Cc: rostedt@goodmis.org
Cc: hugh.dickins@tiscali.co.uk
Cc: benh@kernel.crashing.org
LKML-Reference: <
12503552313921
-git-send-email->
Signed-off-by: Ingo Molnar <mingo@elte.hu>
kernel/rcupreempt_trace.c
patch
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diff --git
a/kernel/rcupreempt_trace.c
b/kernel/rcupreempt_trace.c
index
7c2665c
..
1164034
100644
(file)
--- a/
kernel/rcupreempt_trace.c
+++ b/
kernel/rcupreempt_trace.c
@@
-236,12
+236,13
@@
static ssize_t rcuctrs_read(struct file *filp, char __user *buffer,
cnt += snprintf(&rcupreempt_trace_buf[cnt], RCUPREEMPT_TRACE_BUF_SIZE,
"CPU last cur F M\n");
- for_each_
onlin
e_cpu(cpu) {
+ for_each_
possibl
e_cpu(cpu) {
long *flipctr = rcupreempt_flipctr(cpu);
cnt += snprintf(&rcupreempt_trace_buf[cnt],
RCUPREEMPT_TRACE_BUF_SIZE - cnt,
- "%3d %4ld %3ld %d %d\n",
+ "%3d
%c
%4ld %3ld %d %d\n",
cpu,
+ cpu_is_offline(cpu) ? '!' : ' ',
flipctr[!f],
flipctr[f],
rcupreempt_flip_flag(cpu),