]> git.baikalelectronics.ru Git - kernel.git/commit
perf: Do not allow optimized switch for non-cloned events
authorJiri Olsa <jolsa@redhat.com>
Tue, 24 Jun 2014 08:20:25 +0000 (10:20 +0200)
committerIngo Molnar <mingo@kernel.org>
Wed, 2 Jul 2014 06:35:56 +0000 (08:35 +0200)
commit6e2679ac3b1cc597c20a069472569bdd522a5422
tree6847d2864dabb8ec785bc7036842342b2f3fd174
parentad7d74eea16a74319916aa48935cc7a7f34b5598
perf: Do not allow optimized switch for non-cloned events

The context check in perf_event_context_sched_out allows
non-cloned context to be part of the optimized schedule
out switch.

This could move non-cloned context into another workload
child. Once this child exits, the context is closed and
leaves all original (parent) events in closed state.

Any other new cloned event will have closed state and not
measure anything. And probably causing other odd bugs.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Cc: <stable@vger.kernel.org>
Cc: Arnaldo Carvalho de Melo <acme@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: http://lkml.kernel.org/r/1403598026-2310-2-git-send-email-jolsa@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
kernel/events/core.c