Tao Chen 5108828fec perf/ring_buffer: Allow the EPOLLRDNORM flag for poll ...

[ Upstream commit c96fff391c ]

The poll man page says POLLRDNORM is equivalent to POLLIN. For poll(),
it seems that if user sets pollfd with POLLRDNORM in userspace, perf_poll
will not return until timeout even if perf_output_wakeup called,
whereas POLLIN returns.

Fixes: 76369139ce ("perf: Split up buffer handling from core code")
Signed-off-by: Tao Chen <chen.dylane@linux.dev>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: https://lore.kernel.org/r/20250314030036.2543180-1-chen.dylane@linux.dev
Signed-off-by: Sasha Levin <sashal@kernel.org>

2025-04-10 14:39:12 +02:00

..

callchain.c

…

core.c

perf/core: Fix pmus_lock vs. pmus_srcu ordering

2025-03-13 13:02:04 +01:00

hw_breakpoint_test.c

…

hw_breakpoint.c

…

internal.h

…

Makefile

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ring_buffer.c

perf/ring_buffer: Allow the EPOLLRDNORM flag for poll

2025-04-10 14:39:12 +02:00

uprobes.c

uprobes: Fix race in uprobe_free_utask

2025-03-13 13:02:19 +01:00