[GIT PULL] overlayfs fixes for 7.0-rc6

[GIT PULL] overlayfs fixes for 7.0-rc6

[Amir Goldstein]

Hi Linus,

Please pull overlayfs fixes for 7.0-rc6 to fix two regressions
from v6.7 (minor impact) and from v6.12 (major performance impact).

This branch has been sitting in linux-next for a couple of day and
it has gone through the usual overlayfs test routines.

The branch merges cleanly with master branch of the moment.

Thanks,
Amir.

----------------------------------------------------------------
The following changes since commit f338e77383789c0cae23ca3d48adcc5e9e137e3c:

  Linux 7.0-rc4 (2026-03-15 13:52:05 -0700)

are available in the Git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/overlayfs/vfs.git ovl-fixes-7.0-rc6

for you to fetch changes up to 1f6ee9be92f8df85a8c9a5a78c20fd39c0c21a95:

  ovl: make fsync after metadata copy-up opt-in mount option (2026-03-27 12:48:10 +0100)

----------------------------------------------------------------
overlayfs fixes for 7.0-rc6:

- Fix regression in 'xino' feature detection.
  I clumsily introduced this regression myself when working on another
  subsystem (fsnotify).  Both the regression and the fix have almost
  no visible impact on users except for some kmsg prints.

- Fix to performance regression in v6.12.
  This regression was reported by Google GOC developers.
  It is not uncommon these days for the year-old mature LTS to
  get adopted by distros and get exposed to many new workloads.
  We made a sub-smart move of making a behavior change in v6.12
  which could impact performance, without making it opt-in.
  Fixing this mistake retroactively, to be picked by LTS.

----------------------------------------------------------------
Amir Goldstein (1):
      ovl: fix wrong detection of 32bit inode numbers

Fei Lv (1):
      ovl: make fsync after metadata copy-up opt-in mount option

 Documentation/filesystems/overlayfs.rst | 50 +++++++++++++++++++++++++++++++++
 fs/overlayfs/copy_up.c                  |  6 ++--
 fs/overlayfs/overlayfs.h                | 21 ++++++++++++++
 fs/overlayfs/ovl_entry.h                |  7 +----
 fs/overlayfs/params.c                   | 33 ++++++++++++++++++----
 fs/overlayfs/super.c                    |  2 +-
 fs/overlayfs/util.c                     |  5 +++-
 7 files changed, 108 insertions(+), 16 deletions(-)

Re: [GIT PULL] overlayfs fixes for 7.0-rc6

[Amir Goldstein]

On Sun, Mar 29, 2026 at 11:26 AM Amir Goldstein <amir73il@gmail.com> wrote:
>
> Hi Linus,
>
> Please pull overlayfs fixes for 7.0-rc6 to fix two regressions
> from v6.7 (minor impact) and from v6.12 (major performance impact).
>
> This branch has been sitting in linux-next for a couple of day and
> it has gone through the usual overlayfs test routines.
>
> The branch merges cleanly with master branch of the moment.
>
> Thanks,
> Amir.
>
> ----------------------------------------------------------------
> The following changes since commit f338e77383789c0cae23ca3d48adcc5e9e137e3c:
>
>   Linux 7.0-rc4 (2026-03-15 13:52:05 -0700)
>
> are available in the Git repository at:
>
>   git://git.kernel.org/pub/scm/linux/kernel/git/overlayfs/vfs.git ovl-fixes-7.0-rc6
>
> for you to fetch changes up to 1f6ee9be92f8df85a8c9a5a78c20fd39c0c21a95:
>
>   ovl: make fsync after metadata copy-up opt-in mount option (2026-03-27 12:48:10 +0100)
>
> ----------------------------------------------------------------
> overlayfs fixes for 7.0-rc6:
>
> - Fix regression in 'xino' feature detection.
>   I clumsily introduced this regression myself when working on another
>   subsystem (fsnotify).  Both the regression and the fix have almost
>   no visible impact on users except for some kmsg prints.
>
> - Fix to performance regression in v6.12.
>   This regression was reported by Google GOC developers.

Oops typo (should be Google COS)
You may want to fix this in your merge commit.

>   It is not uncommon these days for the year-old mature LTS to
>   get adopted by distros and get exposed to many new workloads.
>   We made a sub-smart move of making a behavior change in v6.12
>   which could impact performance, without making it opt-in.
>   Fixing this mistake retroactively, to be picked by LTS.
>
> ----------------------------------------------------------------
> Amir Goldstein (1):
>       ovl: fix wrong detection of 32bit inode numbers
>
> Fei Lv (1):
>       ovl: make fsync after metadata copy-up opt-in mount option
>
>  Documentation/filesystems/overlayfs.rst | 50 +++++++++++++++++++++++++++++++++
>  fs/overlayfs/copy_up.c                  |  6 ++--
>  fs/overlayfs/overlayfs.h                | 21 ++++++++++++++
>  fs/overlayfs/ovl_entry.h                |  7 +----
>  fs/overlayfs/params.c                   | 33 ++++++++++++++++++----
>  fs/overlayfs/super.c                    |  2 +-
>  fs/overlayfs/util.c                     |  5 +++-
>  7 files changed, 108 insertions(+), 16 deletions(-)

Re: [GIT PULL] overlayfs fixes for 7.0-rc6

[pr-tracker-bot]

The pull request you sent on Sun, 29 Mar 2026 11:26:58 +0200:

> git://git.kernel.org/pub/scm/linux/kernel/git/overlayfs/vfs.git ovl-fixes-7.0-rc6

has been merged into torvalds/linux.git:
https://git.kernel.org/torvalds/c/a3d97d1d3fa68253927a6e6c2fdfe7c039073af7

Thank you!

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