perf/core: Provide a kernel-internal interface to pause perf_event

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Exporting perf_event_pause() as an external accessor for kernel users (such
as KVM) who may do both disable perf_event and read count with just one
time to hold perf_event_ctx_lock. Also the value could be reset optionally.

Suggested-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Like Xu <like.xu@linux.intel.com>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

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Like Xu 2019-10-27 18:52:39 +08:00 • committed by Paolo Bonzini

parent 3ca270fc9e

commit 52ba4b0b99

2 changed files with 23 additions and 0 deletions

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5

include/linux/perf_event.h

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18

kernel/events/core.c

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