diff options
author | Davidlohr Bueso <dave@stgolabs.net> | 2021-05-06 18:04:04 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2021-05-06 19:24:13 -0700 |
commit | 1e3b918d1dd18bcea3df9339c2d8910ffa95686a (patch) | |
tree | 6f3c8b7b168746727fa972d604bbfe22e640b0d1 /fs/eventpoll.c | |
parent | 7e6cdd7fd94380a3b87b2ce087903b3722b3d0d6 (diff) |
kselftest: introduce new epoll test case
Patch series "fs/epoll: restore user-visible behavior upon event ready".
This series tries to address a change in user visible behavior, reported
in https://bugzilla.kernel.org/show_bug.cgi?id=208943.
Epoll does not report an event to all the threads running epoll_wait()
on the same epoll descriptor. Unsurprisingly, this was bisected back to
339ddb53d373 (fs/epoll: remove unnecessary wakeups of nested epoll), which
has had various problems in the past, beyond only nested epoll usage.
This patch (of 2):
This incorporates the testcase originally reported in:
https://bugzilla.kernel.org/show_bug.cgi?id=208943
Which ensures an event is reported to all threads blocked on the same
epoll descriptor, otherwise only a single thread will receive the wakeup
once the event become ready.
Link: https://lkml.kernel.org/r/20210405231025.33829-1-dave@stgolabs.net
Link: https://lkml.kernel.org/r/20210405231025.33829-2-dave@stgolabs.net
Signed-off-by: Davidlohr Bueso <dbueso@suse.de>
Cc: Jason Baron <jbaron@akamai.com>
Cc: Roman Penyaev <rpenyaev@suse.de>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/eventpoll.c')
0 files changed, 0 insertions, 0 deletions