perf top: Fix freeze on --call-graph flat/folded
authorNamhyung Kim <namhyung@kernel.org>
Thu, 26 Nov 2015 07:08:18 +0000 (16:08 +0900)
committerArnaldo Carvalho de Melo <acme@redhat.com>
Thu, 26 Nov 2015 16:32:08 +0000 (13:32 -0300)
commit0356218a68551f051998f4fb5074a1eed7a346fe
treec599e54a2a67135df7f4a94127672ca3ddba4922
parentb49a8fe52626814968b9a9d27d7ad1cadc5532ed
perf top: Fix freeze on --call-graph flat/folded

The callchain rbtree is rebuilt periodically, so it needs to
reinitialize the root everytime.  Otherwise it can be stuck in the
rbtree insertion with stale pointers.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kan Liang <kan.liang@intel.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/1448521700-32062-1-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
tools/perf/util/callchain.c