diff options
author | Peter Zijlstra | 2014-02-24 12:06:12 +0100 |
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committer | Ingo Molnar | 2014-02-27 12:38:03 +0100 |
commit | e3703f8cdfcf39c25c4338c3ad8e68891cca3731 (patch) | |
tree | b4fc6439f43eca37c954ce4d5d2848279b115b99 /tools/perf/arch/x86/util/unwind.c | |
parent | 26e61e8939b1fe8729572dabe9a9e97d930dd4f6 (diff) |
perf: Fix hotplug splat
Drew Richardson reported that he could make the kernel go *boom* when hotplugging
while having perf events active.
It turned out that when you have a group event, the code in
__perf_event_exit_context() fails to remove the group siblings from
the context.
We then proceed with destroying and freeing the event, and when you
re-plug the CPU and try and add another event to that CPU, things go
*boom* because you've still got dead entries there.
Reported-by: Drew Richardson <drew.richardson@arm.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Cc: Will Deacon <will.deacon@arm.com>
Cc: <stable@vger.kernel.org>
Link: http://lkml.kernel.org/n/tip-k6v5wundvusvcseqj1si0oz0@git.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'tools/perf/arch/x86/util/unwind.c')
0 files changed, 0 insertions, 0 deletions