netdev - Re: [PATCH 0/5] poll_wait: add mb() to fix theoretical race between waitqueue

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Message-ID: <CAHk-=wgvpziaLOTNV9cbitHXf7Lz0ZAW+gstacZqJqRqR8h66A@mail.gmail.com>
Date: Tue, 7 Jan 2025 09:38:36 -0800
From: Linus Torvalds <torvalds@...ux-foundation.org>
To: Oleg Nesterov <oleg@...hat.com>
Cc: Christian Brauner <brauner@...nel.org>, Manfred Spraul <manfred@...orfullife.com>, 
	"David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, Jens Axboe <axboe@...nel.dk>, 
	Pavel Begunkov <asml.silence@...il.com>, WangYuli <wangyuli@...ontech.com>, 
	linux-kernel@...r.kernel.org, io-uring@...r.kernel.org, 
	netdev@...r.kernel.org
Subject: Re: [PATCH 0/5] poll_wait: add mb() to fix theoretical race between
 waitqueue_active() and .poll()

On Tue, 7 Jan 2025 at 08:27, Oleg Nesterov <oleg@...hat.com> wrote:
>
> I misread fs/eventpoll.c, it has the same problem. And more __pollwait()-like
> functions, for example p9_pollwait(). So 1/5 adds mb() into poll_wait(), not
> into __pollwait().

Ack on all five patches, looks sane to me.

Christian, I'm assuming this goes through your tree? If not, holler,
and I can take it directly.

            Linus