The following commit has been merged into the perf/core branch of tip: Commit-ID: fd20bb51ed3913e0d25085eb79e8c0babfb4ee28 Gitweb: https://git.kernel.org/tip/fd20bb51ed3913e0d25085eb79e8c0babfb4ee28 Author: Kyle Huey <me@xxxxxxxxxxxx> AuthorDate: Sat, 13 Apr 2024 07:16:18 -07:00 Committer: Ingo Molnar <mingo@xxxxxxxxxx> CommitterDate: Sun, 14 Apr 2024 22:26:32 +02:00 perf/ring_buffer: Trigger IO signals for watermark_wakeup perf_output_wakeup() already marks the perf event fd available for polling. Trigger IO signals with FASYNC too. Signed-off-by: Kyle Huey <khuey@xxxxxxxxxxxx> Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx> Link: https://lore.kernel.org/r/20240413141618.4160-3-khuey@xxxxxxxxxxxx --- kernel/events/ring_buffer.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/kernel/events/ring_buffer.c b/kernel/events/ring_buffer.c index 60ed43d..4013408 100644 --- a/kernel/events/ring_buffer.c +++ b/kernel/events/ring_buffer.c @@ -22,6 +22,10 @@ static void perf_output_wakeup(struct perf_output_handle *handle) atomic_set(&handle->rb->poll, EPOLLIN); handle->event->pending_wakeup = 1; + + if (*perf_event_fasync(handle->event) && !handle->event->pending_kill) + handle->event->pending_kill = POLL_IN; + irq_work_queue(&handle->event->pending_irq); }
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