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(parent: 267fb27) | patch
perf/x86: Reduce stack usage for x86_pmu::drain_pebs()
authorPeter Zijlstra <peterz@infradead.org>
Fri, 30 Oct 2020 13:58:48 +0000 (14:58 +0100)
committerPeter Zijlstra <peterz@infradead.org>
Mon, 9 Nov 2020 17:12:33 +0000 (18:12 +0100)
commit9dfa9a5c9bae3417b87824e7ac73b00c10b6a874
tree2c36d0070f18e59ff947b56b4ca53ffad5be1744tree | snapshot
parent267fb27352b6fc9fdbad753127a239f75618ecbccommit | diff
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
arch/x86/events/intel/core.c diff | blob | history
arch/x86/events/intel/ds.c diff | blob | history
arch/x86/events/perf_event.h diff | blob | history
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