linux-kernel - Re: [PATCH v2] fs/netfs/fscache_io: remove the obsolete "using

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Message-ID: <20240730-bogen-absuchen-8ab2d9ba0406@brauner>
Date: Tue, 30 Jul 2024 14:29:46 +0200
From: Christian Brauner <brauner@...nel.org>
To: dhowells@...hat.com,
	jlayton@...nel.org,
	Max Kellermann <max.kellermann@...os.com>
Cc: Christian Brauner <brauner@...nel.org>,
	willy@...radead.org,
	linux-cachefs@...hat.com,
	linux-fsdevel@...r.kernel.org,
	ceph-devel@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Subject: Re: [PATCH v2] fs/netfs/fscache_io: remove the obsolete "using_pgpriv2" flag

On Mon, 29 Jul 2024 11:28:28 +0200, Max Kellermann wrote:
> This fixes a crash bug caused by commit ae678317b95e ("netfs: Remove
> deprecated use of PG_private_2 as a second writeback flag") by
> removing a leftover folio_end_private_2() call after all calls to
> folio_start_private_2() had been removed by the commit.
> 
> By calling folio_end_private_2() without folio_start_private_2(), the
> folio refcounter breaks and causes trouble like RCU stalls and general
> protection faults.
> 
> [...]

Applied to the vfs.fixes branch of the vfs/vfs.git tree.
Patches in the vfs.fixes branch should appear in linux-next soon.

Please report any outstanding bugs that were missed during review in a
new review to the original patch series allowing us to drop it.

It's encouraged to provide Acked-bys and Reviewed-bys even though the
patch has now been applied. If possible patch trailers will be updated.

Note that commit hashes shown below are subject to change due to rebase,
trailer updates or similar. If in doubt, please check the listed branch.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs.git
branch: vfs.fixes

[1/1] fs/netfs/fscache_io: remove the obsolete "using_pgpriv2" flag
      https://git.kernel.org/vfs/vfs/c/f7244a2b1d4c