From: Oleg Nesterov <oleg@redhat.com>
To: Breno Leitao <leitao@debian.org>,
Christian Brauner <brauner@kernel.org>,
Mateusz Guzik <mjguzik@gmail.com>, Jens Axboe <axboe@kernel.dk>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>, Jan Kara <jack@suse.cz>,
Alexey Gladkov <legion@kernel.org>,
linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org,
io-uring@vger.kernel.org
Subject: [RFC PATCH v 0/1] pipe: only enable the extra wake_up(rd_wait) for edge-triggered consumers
Date: Mon, 27 Jul 2026 14:23:34 +0200 [thread overview]
Message-ID: <amdNxsTODR4MCl3R@redhat.com> (raw)
Again, I am not sure this makes a lot of sense. But I'd like to know
your opinion.
Plus I'd like to have the review from sashiko ;)
With or without this patch we need to update the comments to document
that io_uring depends on ->pipe_usage too. And probably rename it to
(say) ->et_poll.
tools/testing/selftests/filesystems/epoll/epoll_wakeup_test.c passes.
See also the test-cases in 1/1, they pass with this patch. And fail if
I remove WRITE_ONCE(pipe->poll_usage, true) in pipe_poll().
Oleg.
---
fs/pipe.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
next reply other threads:[~2026-07-27 12:23 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-07-27 12:23 Oleg Nesterov [this message]
2026-07-27 12:24 ` [RFC PATCH v2 0/1] pipe: only enable the extra wake_up(rd_wait) for edge-triggered consumers Oleg Nesterov
2026-07-27 12:28 ` Oleg Nesterov
2026-07-27 12:28 ` [RFC PATCH v2 1/1] " Oleg Nesterov
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