From: Nam Cao <namcao@linutronix.de>
To: Christian Brauner <brauner@kernel.org>,
Alexander Viro <viro@zeniv.linux.org.uk>, Jan Kara <jack@suse.cz>,
Shuah Khan <shuah@kernel.org>,
Davidlohr Bueso <dave@stgolabs.net>,
Soheil Hassas Yeganeh <soheil@google.com>,
Mateusz Guzik <mjguzik@gmail.com>,
David Laight <david.laight.linux@gmail.com>,
linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-kselftest@vger.kernel.org
Cc: Nam Cao <namcao@linutronix.de>
Subject: [PATCH v2 0/2] eventpoll: Fix epoll_wait() report false negative
Date: Sat, 30 May 2026 11:37:30 +0200 [thread overview]
Message-ID: <cover.1780133499.git.namcao@linutronix.de> (raw)
Hi,
While staring at epoll, I noticed ep_events_available() looks wrong. I
wrote a small program to confirm, and yes it is definitely wrong.
This series adds a reproducer to kselftest, and fix the bug.
v2: Switch to seqlock solution
Nam Cao (2):
selftests/eventpoll: Add test for multiple waiters
eventpoll: Fix epoll_wait() report false negative
fs/eventpoll.c | 20 ++++++++-
.../filesystems/epoll/epoll_wakeup_test.c | 45 +++++++++++++++++++
2 files changed, 64 insertions(+), 1 deletion(-)
--
2.47.3
next reply other threads:[~2026-05-30 9:38 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-05-30 9:37 Nam Cao [this message]
2026-05-30 9:37 ` [PATCH v2 1/2] selftests/eventpoll: Add test for multiple waiters Nam Cao
2026-05-30 9:37 ` [PATCH v2 2/2] eventpoll: Fix epoll_wait() report false negative Nam Cao
2026-06-02 13:20 ` [PATCH v2 0/2] " Christian Brauner
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