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| author | Yan, Zheng <zheng.z.yan@intel.com> | 2012-06-15 14:31:31 +0800 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2012-06-18 12:13:20 +0200 |
| commit | fbfc623f8231c8d8c78aab5841e9c6e5811ab638 (patch) | |
| tree | 54883756f1b404f2232d4d5077219ea98c1fdbfd /kernel/delayacct.c | |
| parent | 4b4969b14490a4f65b572b8f180164181104b5e1 (diff) | |
| download | op-kernel-dev-fbfc623f8231c8d8c78aab5841e9c6e5811ab638.zip op-kernel-dev-fbfc623f8231c8d8c78aab5841e9c6e5811ab638.tar.gz | |
perf: Avoid race between cpu hotplug and installing event
perf_event_open() requires the cpu on which to install event is online,
but the cpu can go offline after perf_event_open checks that. Add a
get_online_cpus()/put_online_cpus() pair to avoid the race.
Signed-off-by: Zheng Yan <zheng.z.yan@intel.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1339741902-8449-3-git-send-email-zheng.z.yan@intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'kernel/delayacct.c')
0 files changed, 0 insertions, 0 deletions
