From: "Darrick J. Wong" <darrick.wong@oracle.com>
To: Christoph Hellwig <hch@infradead.org>
Cc: Brian Foster <bfoster@redhat.com>, linux-xfs@vger.kernel.org
Subject: Re: [PATCH 02/10] xfs: track unlinked inode counts in per-ag data
Date: Mon, 4 Feb 2019 16:26:38 -0800 [thread overview]
Message-ID: <20190205002638.GE7991@magnolia> (raw)
In-Reply-To: <20190204205310.GB30334@infradead.org>
On Mon, Feb 04, 2019 at 12:53:10PM -0800, Christoph Hellwig wrote:
> On Mon, Feb 04, 2019 at 02:24:51PM -0500, Brian Foster wrote:
> > I'm a little confused where we're at with this one given the discussion
> > on the previous version. We've dropped the locking, but left the
> > tracking in place. Are we just relying on holding the agi in the
> > iunlink/iunlink_remove cases? If so, that seems reasonable to me but the
> > commit log should probably have a sentence or two on the serialization
> > rules. The commit log could also use an update to describe how this
> > value is actually used in this patch (as an unmount time check) as
> > opposed to some apparent throttling functionality that isn't a part of
> > this series.
>
> I thought we Darrick was going to drop this tracking from the series,
> as it isn't very useful (at least yet), but maybe I misunderstood the
> previous thread.
I decided to leave the unlinked counter so that we could have a
debugging check. I will make it more explicit that anyone accessing the
counter needs to hold the AGI buffer lock or otherwise assured that
there aren't any other threads.
--D
next prev parent reply other threads:[~2019-02-05 0:26 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-04 17:58 [PATCH v2 00/10] xfs: incore unlinked list Darrick J. Wong
2019-02-04 17:59 ` [PATCH 01/10] xfs: clean up iunlink functions Darrick J. Wong
2019-02-04 19:24 ` Brian Foster
2019-02-04 20:51 ` Christoph Hellwig
2019-02-04 17:59 ` [PATCH 02/10] xfs: track unlinked inode counts in per-ag data Darrick J. Wong
2019-02-04 19:24 ` Brian Foster
2019-02-04 20:53 ` Christoph Hellwig
2019-02-05 0:26 ` Darrick J. Wong [this message]
2019-02-05 6:55 ` Christoph Hellwig
2019-02-05 7:07 ` Darrick J. Wong
2019-02-05 0:42 ` Darrick J. Wong
2019-02-04 17:59 ` [PATCH 03/10] xfs: add xfs_verify_agino_or_null helper Darrick J. Wong
2019-02-04 19:24 ` Brian Foster
2019-02-04 20:53 ` Christoph Hellwig
2019-02-04 17:59 ` [PATCH 04/10] xfs: refactor AGI unlinked bucket updates Darrick J. Wong
2019-02-04 19:25 ` Brian Foster
2019-02-04 20:54 ` Christoph Hellwig
2019-02-04 17:59 ` [PATCH 05/10] xfs: strengthen AGI unlinked inode bucket pointer checks Darrick J. Wong
2019-02-04 17:59 ` [PATCH 06/10] xfs: refactor inode unlinked pointer update functions Darrick J. Wong
2019-02-04 20:56 ` Christoph Hellwig
2019-02-04 21:49 ` Darrick J. Wong
2019-02-05 14:23 ` Brian Foster
2019-02-04 17:59 ` [PATCH 07/10] xfs: refactor unlinked list search and mapping to a separate function Darrick J. Wong
2019-02-04 20:58 ` Christoph Hellwig
2019-02-04 22:23 ` Darrick J. Wong
2019-02-04 17:59 ` [PATCH 08/10] xfs: refactor inode update in iunlink_remove Darrick J. Wong
2019-02-04 20:58 ` Christoph Hellwig
2019-02-05 14:23 ` Brian Foster
2019-02-04 17:59 ` [PATCH 09/10] xfs: add tracepoints for high level iunlink operations Darrick J. Wong
2019-02-04 20:59 ` Christoph Hellwig
2019-02-05 14:24 ` Brian Foster
2019-02-04 18:00 ` [PATCH 10/10] xfs: cache unlinked pointers in an rhashtable Darrick J. Wong
2019-02-04 21:08 ` Christoph Hellwig
2019-02-05 1:02 ` Darrick J. Wong
2019-02-05 14:24 ` Brian Foster
2019-02-05 17:53 ` Darrick J. Wong
2019-02-05 17:57 ` Christoph Hellwig
2019-02-05 18:17 ` Darrick J. Wong
2019-02-05 19:06 ` Brian Foster
2019-02-05 19:20 ` Darrick J. Wong
2019-02-05 20:59 ` Dave Chinner
2019-02-06 18:25 ` Darrick J. Wong
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