From: Christoph Hellwig <hch@infradead.org>
To: Lauri Gates <lauri.gates@gmail.com>
Cc: Christoph Hellwig <hch@infradead.org>,
linux-xfs@vger.kernel.org, Carlos Maiolino <cem@kernel.org>
Subject: Re: Concurrent FIEMAP on reflinked files serialises on the AGF buffer lock
Date: Fri, 6 Nov 2026 07:21:23 -0800 [thread overview]
Message-ID: <au3wczh22TiioGK6@infradead.org> (raw)
In-Reply-To: <20261104124118.34200-1-lauri.gates@gmail.com>
On Wed, Nov 04, 2026 at 02:41:16PM +0200, Lauri Gates wrote:
> Would the refcount-sum ioctl you describe be callable without
> CAP_SYS_ADMIN? A device-wide total reveals much less than per-file
> owners.
I was pointed that patches for refcount reporting already exist:
https://git.kernel.org/pub/scm/linux/kernel/git/djwong/xfs-linux.git/commit/?h=report-refcounts&id=9f3eca4098ff8226911f84af7b21d79670413876
and that does not require privileges, although in this form it might
not be very useful for you.
next prev parent reply other threads:[~2026-11-06 15:21 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-11-02 19:32 Concurrent FIEMAP on reflinked files serialises on the AGF buffer lock Lauri Gates
2026-11-03 5:25 ` Christoph Hellwig
2026-11-04 12:41 ` Lauri Gates
2026-11-04 21:11 ` Dave Chinner
2026-11-06 15:21 ` Christoph Hellwig [this message]
2026-11-04 21:04 ` Dave Chinner
2026-11-06 12:23 ` Lauri Gates
2026-11-06 15:20 ` Christoph Hellwig
2026-11-06 20:40 ` Lauri Gates
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