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| author | Peter Zijlstra <peterz@infradead.org> | 2020-10-30 16:58:48 +0300 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2020-11-09 20:12:33 +0300 |
| commit | 9dfa9a5c9bae3417b87824e7ac73b00c10b6a874 (patch) | |
| tree | 2c36d0070f18e59ff947b56b4ca53ffad5be1744 /arch/x86/events/perf_event.h | |
| parent | 267fb27352b6fc9fdbad753127a239f75618ecbc (diff) | |
| download | linux-9dfa9a5c9bae3417b87824e7ac73b00c10b6a874.tar.xz | |
perf/x86: Reduce stack usage for x86_pmu::drain_pebs()
intel_pmu_drain_pebs_*() is typically called from handle_pmi_common(),
both have an on-stack struct perf_sample_data, which is *big*. Rewire
things so that drain_pebs() can use the one handle_pmi_common() has.
Reported-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20201030151955.054099690@infradead.org
Diffstat (limited to 'arch/x86/events/perf_event.h')
| -rw-r--r-- | arch/x86/events/perf_event.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/events/perf_event.h b/arch/x86/events/perf_event.h index ee2b9b9fc2a5..1d1fe46552ba 100644 --- a/arch/x86/events/perf_event.h +++ b/arch/x86/events/perf_event.h @@ -727,7 +727,7 @@ struct x86_pmu { int pebs_record_size; int pebs_buffer_size; int max_pebs_events; - void (*drain_pebs)(struct pt_regs *regs); + void (*drain_pebs)(struct pt_regs *regs, struct perf_sample_data *data); struct event_constraint *pebs_constraints; void (*pebs_aliases)(struct perf_event *event); unsigned long large_pebs_flags; |