linux-kernel - Re: [PATCH RFC] fs: reduce pointer chasing in is

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Message-ID: <20241114-unten-stilisieren-a3bf89905d19@brauner>
Date: Thu, 14 Nov 2024 10:46:07 +0100
From: Christian Brauner <brauner@...nel.org>
To: Jeff Layton <jlayton@...nel.org>
Cc: Christian Brauner <brauner@...nel.org>,
	Josef Bacik <josef@...icpanda.com>,
	"Darrick J. Wong" <djwong@...nel.org>,
	linux-fsdevel@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Alexander Viro <viro@...iv.linux.org.uk>,
	Jan Kara <jack@...e.cz>
Subject: Re: [PATCH RFC] fs: reduce pointer chasing in is_mgtime() test

On Wed, 13 Nov 2024 09:17:51 -0500, Jeff Layton wrote:
> The is_mgtime test checks whether the FS_MGTIME flag is set in the
> fstype. To get there from the inode though, we have to dereference 3
> pointers.
> 
> Add a new IOP_MGTIME flag, and have inode_init_always() set that flag
> when the fstype flag is set. Then, make is_mgtime test for IOP_MGTIME
> instead.
> 
> [...]

Applied to the vfs.mgtime branch of the vfs/vfs.git tree.
Patches in the vfs.mgtime 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.mgtime

[1/1] fs: reduce pointer chasing in is_mgtime() test
      https://git.kernel.org/vfs/vfs/c/9fed2c0f2f07