linux-kernel - Re: [PATCH v2] fs: move fd_install() slowpath into a dedicated routine and provide commentary

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Message-ID: <20251112-mondfinsternis-rednerpult-f3efbf92cf8a@brauner>
Date: Wed, 12 Nov 2025 10:30:15 +0100
From: Christian Brauner <brauner@...nel.org>
To: Mateusz Guzik <mjguzik@...il.com>
Cc: Christian Brauner <brauner@...nel.org>,
	jack@...e.cz,
	linux-kernel@...r.kernel.org,
	linux-fsdevel@...r.kernel.org,
	viro@...iv.linux.org.uk
Subject: Re: [PATCH v2] fs: move fd_install() slowpath into a dedicated routine and provide commentary

On Mon, 10 Nov 2025 10:56:34 +0100, Mateusz Guzik wrote:
> On stock kernel gcc 14 emits avoidable register spillage:
> 	endbr64
> 	call   ffffffff81374630 <__fentry__>
> 	push   %r13
> 	push   %r12
> 	push   %rbx
> 	sub    $0x8,%rsp
> 	[snip]
> 
> [...]

Applied to the vfs-6.19.misc branch of the vfs/vfs.git tree.
Patches in the vfs-6.19.misc 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-6.19.misc

[1/1] fs: move fd_install() slowpath into a dedicated routine and provide commentary
      https://git.kernel.org/vfs/vfs/c/6ecf5292038e