Re: [PATCH v6 0/3] assorted ->i_count changes + extension of lockless handling

[Christian Brauner]

On Tue, 21 Apr 2026 20:25:35 +0200, Mateusz Guzik wrote:
> The stock kernel support partial lockless in handling in that iput() can
> decrement any value > 1. Any ref acquire however requires the spinlock.
> 
> With this patchset ref acquires when the value was already at least 1
> also become lockless. That is, only transitions 0->1 and 1->0 take the
> lock.
> 
> [...]

Applied to the vfs-7.2.inode branch of the vfs/vfs.git tree.
Patches in the vfs-7.2.inode 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: master

[1/3] fs: add icount_read_once() and stop open-coding ->i_count loads
      https://git.kernel.org/vfs/vfs/c/11abd8ebfe89
[2/3] fs: relocate and tidy up ihold()
      https://git.kernel.org/vfs/vfs/c/f16fbfa2a006
[3/3] fs: allow lockless ->i_count bumps as long as it does not transition 0->1
      https://git.kernel.org/vfs/vfs/c/e22934526e6d