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| author | Peter Zijlstra <peterz@infradead.org> | 2020-10-29 16:29:53 +0100 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2020-11-09 18:12:36 +0100 |
| commit | 2714c3962f304d031d5016c963c4b459337b0749 (patch) | |
| tree | 2862af6a6ad9ed4cc6fd75f1503e03b60cc37024 /kernel | |
| parent | 251ff2d49347793d348babcff745289b11910e96 (diff) | |
| download | linux-2714c3962f304d031d5016c963c4b459337b0749.tar.gz linux-2714c3962f304d031d5016c963c4b459337b0749.tar.bz2 linux-2714c3962f304d031d5016c963c4b459337b0749.zip | |
perf: Fix event multiplexing for exclusive groups
Commit 9e6302056f80 ("perf: Use hrtimers for event multiplexing")
placed the hrtimer (re)start call in the wrong place. Instead of
capturing all scheduling failures, it only considered the PMU failure.
The result is that groups using perf_event_attr::exclusive are no
longer rotated.
Fixes: 9e6302056f80 ("perf: Use hrtimers for event multiplexing")
Reported-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20201029162902.038667689@infradead.org
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/events/core.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/events/core.c b/kernel/events/core.c index f0e526866a1c..00be48acdc36 100644 --- a/kernel/events/core.c +++ b/kernel/events/core.c @@ -2612,7 +2612,6 @@ group_error: error: pmu->cancel_txn(pmu); - perf_mux_hrtimer_restart(cpuctx); return -EAGAIN; } @@ -3672,6 +3671,7 @@ static int merge_sched_in(struct perf_event *event, void *data) *can_add_hw = 0; ctx->rotate_necessary = 1; + perf_mux_hrtimer_restart(cpuctx); } return 0; |