From: Christoph Hellwig <hch@infradead.org>
To: Dave Chinner <david@fromorbit.com>
Cc: "Darrick J. Wong" <djwong@kernel.org>, linux-xfs@vger.kernel.org
Subject: Re: [PATCH 6/6] xfs: lockless buffer lookup
Date: Sun, 10 Jul 2022 22:16:01 -0700 [thread overview]
Message-ID: <YsuyEeqowEgaM118@infradead.org> (raw)
In-Reply-To: <20220707123633.GM227878@dread.disaster.area>
On Thu, Jul 07, 2022 at 10:36:33PM +1000, Dave Chinner wrote:
> >
> > Hmm, so what still uses pag_buf_lock? Are we still using it to
> > serialize xfs_buf_rele calls?
>
> slow path lookup/insert and xfs_buf_rele calls.
Note that we might be able to eventually remove the locking in rele
if we switch the lookup slow path to use atomic_inc_unless_zero as
well. But it would need a very careful audit.
next prev parent reply other threads:[~2022-07-11 5:16 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-06-27 6:08 [PATCH 0/6 v2] xfs: lockless buffer lookups Dave Chinner
2022-06-27 6:08 ` [PATCH 1/6] xfs: rework xfs_buf_incore() API Dave Chinner
2022-06-29 7:30 ` Christoph Hellwig
2022-06-29 21:24 ` Darrick J. Wong
2022-06-27 6:08 ` [PATCH 2/6] xfs: break up xfs_buf_find() into individual pieces Dave Chinner
2022-06-28 2:22 ` Chris Dunlop
2022-06-29 7:35 ` Christoph Hellwig
2022-06-29 21:50 ` Darrick J. Wong
2022-06-27 6:08 ` [PATCH 3/6] xfs: merge xfs_buf_find() and xfs_buf_get_map() Dave Chinner
2022-06-29 7:40 ` Christoph Hellwig
2022-06-29 22:06 ` Darrick J. Wong
2022-07-07 12:39 ` Dave Chinner
2022-06-27 6:08 ` [PATCH 4/6] xfs: reduce the number of atomic when locking a buffer after lookup Dave Chinner
2022-06-29 22:00 ` Darrick J. Wong
2022-06-27 6:08 ` [PATCH 5/6] xfs: remove a superflous hash lookup when inserting new buffers Dave Chinner
2022-06-29 7:40 ` Christoph Hellwig
2022-06-29 22:01 ` Darrick J. Wong
2022-06-27 6:08 ` [PATCH 6/6] xfs: lockless buffer lookup Dave Chinner
2022-06-29 7:41 ` Christoph Hellwig
2022-06-29 22:04 ` Darrick J. Wong
2022-07-07 12:36 ` Dave Chinner
2022-07-07 17:55 ` Darrick J. Wong
2022-07-11 5:16 ` Christoph Hellwig [this message]
2022-07-07 2:40 ` [PATCH 0/6 v2] xfs: lockless buffer lookups Darrick J. Wong
-- strict thread matches above, loose matches on Subject: below --
2022-07-07 23:52 [PATCH 0/6 v3] " Dave Chinner
2022-07-07 23:52 ` [PATCH 6/6] xfs: lockless buffer lookup Dave Chinner
2022-07-10 0:15 ` Darrick J. Wong
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