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perf: Optimize ctx_sched_out()
authorPeter Zijlstra <a.p.zijlstra@chello.nl>
Sat, 9 Apr 2011 19:17:40 +0000 (21:17 +0200)
committerIngo Molnar <mingo@elte.hu>
Sat, 28 May 2011 16:01:09 +0000 (18:01 +0200)
Oleg noted that ctx_sched_out() disables the PMU even though it might
not actually do something, avoid needless PMU-disabling.

Reported-by: Oleg Nesterov <oleg@redhat.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/20110409192141.665385503@chello.nl
Signed-off-by: Ingo Molnar <mingo@elte.hu>

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