Re: [PATCH 2/2 v2] nfsd: skip some unnecessary stats in the v4 case

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Subject: Re: [PATCH 2/2 v2] nfsd: skip some unnecessary stats in the v4 case
From: Christoph Hellwig <hch@xxxxxxxxxxxxx>
Date: Sat, 30 Jan 2021 06:02:39 +0000
Cc: Christoph Hellwig <hch@xxxxxxxxxxxxx>, "J. Bruce Fields" <bfields@xxxxxxxxxx>, linux-nfs@xxxxxxxxxxxxxxx, linux-fsdevel@xxxxxxxxxxxxxxx, Trond Myklebust <trondmy@xxxxxxxxxxxxxxx>, Anna Schumaker <schumakeranna@xxxxxxxxx>, Chuck Lever <chuck.lever@xxxxxxxxxx>
In-reply-to: <20210129192701.GD8033@fieldses.org>
References: <1611084297-27352-1-git-send-email-bfields@redhat.com> <1611084297-27352-3-git-send-email-bfields@redhat.com> <20210120084638.GA3678536@infradead.org> <20210121202756.GA13298@pick.fieldses.org> <20210122082059.GA119852@infradead.org> <20210129192629.GC8033@fieldses.org> <20210129192701.GD8033@fieldses.org>

On Fri, Jan 29, 2021 at 02:27:01PM -0500, J. Bruce Fields wrote:
> From: "J. Bruce Fields" <bfields@xxxxxxxxxx>
> 
> In the typical case of v4 and an i_version-supporting filesystem, we can
> skip a stat which is only required to fake up a change attribute from
> ctime.
> 
> Signed-off-by: J. Bruce Fields <bfields@xxxxxxxxxx>

Looks good,

Reviewed-by: Christoph Hellwig <hch@xxxxxx>

References:
- [PATCH 0/3] NFS change attribute patches
  - From: J. Bruce Fields
- [PATCH 2/3] nfsd: move change attribute generation to filesystem
  - From: J. Bruce Fields
- Re: [PATCH 2/3] nfsd: move change attribute generation to filesystem
  - From: Christoph Hellwig
- Re: [PATCH 2/3] nfsd: move change attribute generation to filesystem
  - From: J. Bruce Fields
- Re: [PATCH 2/3] nfsd: move change attribute generation to filesystem
  - From: Christoph Hellwig
- [PATCH 1/2 v2] nfs: use change attribute for NFS re-exports
  - From: J. Bruce Fields
- [PATCH 2/2 v2] nfsd: skip some unnecessary stats in the v4 case
  - From: J. Bruce Fields

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