linux-kernel - Re: [PATCH] fs/pipe: Read pipe->{head,tail} atomically outside pipe->mutex

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Message-ID: <CAHk-=whfrgndT5Y8PJtHtFwhuef2eCEr46NUdsMD9MVEom_HXw@mail.gmail.com>
Date: Tue, 4 Mar 2025 09:03:57 -1000
From: Linus Torvalds <torvalds@...ux-foundation.org>
To: K Prateek Nayak <kprateek.nayak@....com>
Cc: Alexander Viro <viro@...iv.linux.org.uk>, Christian Brauner <brauner@...nel.org>, 
	Oleg Nesterov <oleg@...hat.com>, Swapnil Sapkal <swapnil.sapkal@....com>, 
	Alexey Gladkov <legion@...nel.org>, linux-fsdevel@...r.kernel.org, 
	linux-kernel@...r.kernel.org, Jan Kara <jack@...e.cz>, 
	Mateusz Guzik <mjguzik@...il.com>, Manfred Spraul <manfred@...orfullife.com>, 
	David Howells <dhowells@...hat.com>, WangYuli <wangyuli@...ontech.com>, 
	Hillf Danton <hdanton@...a.com>, "Gautham R. Shenoy" <gautham.shenoy@....com>, Neeraj.Upadhyay@....com, 
	Ananth.narayan@....com
Subject: Re: [PATCH] fs/pipe: Read pipe->{head,tail} atomically outside pipe->mutex

On Tue, 4 Mar 2025 at 03:52, K Prateek Nayak <kprateek.nayak@....com> wrote:
>
> pipe_readable(), pipe_writable(), and pipe_poll() can read "pipe->head"
> and "pipe->tail" outside of "pipe->mutex" critical section.  [...]

Thanks, applied.

                Linus