linux-kernel - Re: [GIT PULL] hotfixes for 6.7

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Date: Wed, 27 Dec 2023 16:36:16 -0800
From: Linus Torvalds <torvalds@...ux-foundation.org>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: mm-commits@...r.kernel.org, linux-mm@...ck.org, 
	linux-kernel@...r.kernel.org
Subject: Re: [GIT PULL] hotfixes for 6.7

On Wed, 27 Dec 2023 at 15:03, Andrew Morton <akpm@...ux-foundation.org> wrote:
>
> Baokun Li (1):
>       mm/filemap: avoid buffered read/write race to read inconsistent data

Hmm. I wonder if we should have made the i_size_read/write helpers be
smp_load_acquire/store_release()?

The existing smp_wmb() are almost accidental, and aren't primarily
about the inode size, but about the page/folio uptodate bit. I guess
they work, but it's all a bit messy.

Which might *also* be better off with acquire/release, but we don't
have those bitops, I guess. Oh well.

             Linus