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| author | Peter Zijlstra <a.p.zijlstra@chello.nl> | 2009-11-20 22:19:43 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2009-11-21 14:11:35 +0100 |
| commit | 453f19eea7dbad837425e9b07d84568d14898794 (patch) | |
| tree | 3b1d757a72512b5ab566649b9eda59e032734993 /kernel/perf_event.c | |
| parent | perf symbols: Change the kernel DSO name if it comes from kallsyms (diff) | |
| download | linux-453f19eea7dbad837425e9b07d84568d14898794.tar.xz linux-453f19eea7dbad837425e9b07d84568d14898794.zip | |
perf: Allow for custom overflow handlers
in-kernel perf users might wish to have custom actions on the
sample interrupt.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
LKML-Reference: <20091120212508.222339539@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/perf_event.c')
| -rw-r--r-- | kernel/perf_event.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/kernel/perf_event.c b/kernel/perf_event.c index 3852e2656bb0..1dfb6cc4fdea 100644 --- a/kernel/perf_event.c +++ b/kernel/perf_event.c @@ -3710,7 +3710,11 @@ static int __perf_event_overflow(struct perf_event *event, int nmi, perf_event_disable(event); } - perf_event_output(event, nmi, data, regs); + if (event->overflow_handler) + event->overflow_handler(event, nmi, data, regs); + else + perf_event_output(event, nmi, data, regs); + return ret; } @@ -4836,6 +4840,8 @@ inherit_event(struct perf_event *parent_event, if (parent_event->attr.freq) child_event->hw.sample_period = parent_event->hw.sample_period; + child_event->overflow_handler = parent_event->overflow_handler; + /* * Link it up in the child's context: */ |