From: Dave Chinner <david@fromorbit.com>
To: "Darrick J. Wong" <darrick.wong@oracle.com>
Cc: linux-xfs@vger.kernel.org
Subject: Re: [PATCH 10/24] xfs: clean up the buffer iodone callback functions
Date: Mon, 25 May 2020 10:37:23 +1000 [thread overview]
Message-ID: <20200525003723.GU2040@dread.disaster.area> (raw)
In-Reply-To: <20200522222611.GN8230@magnolia>
On Fri, May 22, 2020 at 03:26:11PM -0700, Darrick J. Wong wrote:
> On Fri, May 22, 2020 at 01:50:15PM +1000, Dave Chinner wrote:
> > @@ -1188,19 +1146,10 @@ void
> > xfs_buf_inode_iodone(
> > struct xfs_buf *bp)
> > {
> > - struct xfs_buf_log_item *blip = bp->b_log_item;
> > - struct xfs_log_item *lip;
> > -
> > if (xfs_buf_had_callback_errors(bp))
> > return;
> >
> > - /* If there is a buf_log_item attached, run its callback */
> > - if (blip) {
> > - lip = &blip->bli_item;
> > - lip->li_cb(bp, lip);
> > - bp->b_log_item = NULL;
> > - }
> > -
> > + xfs_buf_item_done(bp);
> > xfs_iflush_done(bp);
>
> Just out of curiosity, we still have a reference to bp here even if
> xfs_buf_item_done calls xfs_buf_rele, right?
Yes, the IO still has a reference to the buffer that won't be
released until the xfs_buf_ioend_finish() call is made.
> I think the answer is that yes
> we do still have the reference because the inodes themselves hold references
> to the cluster buffer, right?
That too, but the important one is the IO reference as even the
inode references can go away on completion at this point.
> If so,
> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Ta.
Cheers,
Dave.
--
Dave Chinner
david@fromorbit.com
next prev parent reply other threads:[~2020-05-25 0:37 UTC|newest]
Thread overview: 91+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-22 3:50 [PATCH 00/24] xfs: rework inode flushing to make inode reclaim fully asynchronous Dave Chinner
2020-05-22 3:50 ` [PATCH 01/24] xfs: remove logged flag from inode log item Dave Chinner
2020-05-22 7:25 ` Christoph Hellwig
2020-05-22 21:13 ` Darrick J. Wong
2020-05-22 3:50 ` [PATCH 02/24] xfs: add an inode item lock Dave Chinner
2020-05-22 6:45 ` Amir Goldstein
2020-05-22 21:24 ` Darrick J. Wong
2020-05-23 8:45 ` Christoph Hellwig
2020-05-22 3:50 ` [PATCH 03/24] xfs: mark inode buffers in cache Dave Chinner
2020-05-22 7:45 ` Amir Goldstein
2020-05-22 21:35 ` Darrick J. Wong
2020-05-24 23:41 ` Dave Chinner
2020-05-23 8:48 ` Christoph Hellwig
2020-05-25 0:06 ` Dave Chinner
2020-05-22 3:50 ` [PATCH 04/24] xfs: mark dquot " Dave Chinner
2020-05-22 7:46 ` Amir Goldstein
2020-05-22 21:38 ` Darrick J. Wong
2020-05-22 3:50 ` [PATCH 05/24] xfs: mark log recovery buffers for completion Dave Chinner
2020-05-22 7:41 ` Amir Goldstein
2020-05-24 23:54 ` Dave Chinner
2020-05-22 21:41 ` Darrick J. Wong
2020-05-22 3:50 ` [PATCH 06/24] xfs: call xfs_buf_iodone directly Dave Chinner
2020-05-22 7:56 ` Amir Goldstein
2020-05-22 21:53 ` Darrick J. Wong
2020-05-22 3:50 ` [PATCH 07/24] xfs: clean up whacky buffer log item list reinit Dave Chinner
2020-05-22 22:01 ` Darrick J. Wong
2020-05-23 8:50 ` Christoph Hellwig
2020-05-22 3:50 ` [PATCH 08/24] xfs: fold xfs_istale_done into xfs_iflush_done Dave Chinner
2020-05-22 22:10 ` Darrick J. Wong
2020-05-23 9:12 ` Christoph Hellwig
2020-05-22 3:50 ` [PATCH 09/24] xfs: use direct calls for dquot IO completion Dave Chinner
2020-05-22 22:13 ` Darrick J. Wong
2020-05-23 9:16 ` Christoph Hellwig
2020-05-22 3:50 ` [PATCH 10/24] xfs: clean up the buffer iodone callback functions Dave Chinner
2020-05-22 22:26 ` Darrick J. Wong
2020-05-25 0:37 ` Dave Chinner [this message]
2020-05-23 9:19 ` Christoph Hellwig
2020-05-22 3:50 ` [PATCH 11/24] xfs: get rid of log item callbacks Dave Chinner
2020-05-22 22:27 ` Darrick J. Wong
2020-05-23 9:19 ` Christoph Hellwig
2020-05-22 3:50 ` [PATCH 12/24] xfs: pin inode backing buffer to the inode log item Dave Chinner
2020-05-22 22:39 ` Darrick J. Wong
2020-05-23 9:34 ` Christoph Hellwig
2020-05-23 21:43 ` Dave Chinner
2020-05-24 5:31 ` Christoph Hellwig
2020-05-24 23:13 ` Dave Chinner
2020-05-22 3:50 ` [PATCH 13/24] xfs: make inode reclaim almost non-blocking Dave Chinner
2020-05-22 12:19 ` Amir Goldstein
2020-05-22 22:48 ` Darrick J. Wong
2020-05-23 22:29 ` Dave Chinner
2020-05-22 3:50 ` [PATCH 14/24] xfs: remove IO submission from xfs_reclaim_inode() Dave Chinner
2020-05-22 23:06 ` Darrick J. Wong
2020-05-25 3:49 ` Dave Chinner
2020-05-23 9:40 ` Christoph Hellwig
2020-05-23 22:35 ` Dave Chinner
2020-05-22 3:50 ` [PATCH 15/24] xfs: allow multiple reclaimers per AG Dave Chinner
2020-05-22 23:10 ` Darrick J. Wong
2020-05-23 22:35 ` Dave Chinner
2020-05-22 3:50 ` [PATCH 16/24] xfs: don't block inode reclaim on the ILOCK Dave Chinner
2020-05-22 23:11 ` Darrick J. Wong
2020-05-22 3:50 ` [PATCH 17/24] xfs: remove SYNC_TRYLOCK from inode reclaim Dave Chinner
2020-05-22 23:14 ` Darrick J. Wong
2020-05-23 22:42 ` Dave Chinner
2020-05-22 3:50 ` [PATCH 18/24] xfs: clean up inode reclaim comments Dave Chinner
2020-05-22 23:17 ` Darrick J. Wong
2020-05-22 3:50 ` [PATCH 19/24] xfs: attach inodes to the cluster buffer when dirtied Dave Chinner
2020-05-22 23:48 ` Darrick J. Wong
2020-05-23 22:59 ` Dave Chinner
2020-05-22 3:50 ` [PATCH 20/24] xfs: xfs_iflush() is no longer necessary Dave Chinner
2020-05-22 23:54 ` Darrick J. Wong
2020-05-22 3:50 ` [PATCH 21/24] xfs: rename xfs_iflush_int() Dave Chinner
2020-05-22 12:33 ` Amir Goldstein
2020-05-22 23:57 ` Darrick J. Wong
2020-05-22 3:50 ` [PATCH 22/24] xfs: rework xfs_iflush_cluster() dirty inode iteration Dave Chinner
2020-05-23 0:13 ` Darrick J. Wong
2020-05-23 23:14 ` Dave Chinner
2020-05-23 11:31 ` Christoph Hellwig
2020-05-23 23:23 ` Dave Chinner
2020-05-24 5:32 ` Christoph Hellwig
2020-05-23 11:39 ` Christoph Hellwig
2020-05-22 3:50 ` [PATCH 23/24] xfs: factor xfs_iflush_done Dave Chinner
2020-05-23 0:20 ` Darrick J. Wong
2020-05-23 11:35 ` Christoph Hellwig
2020-05-22 3:50 ` [PATCH 24/24] xfs: remove xfs_inobp_check() Dave Chinner
2020-05-23 0:16 ` Darrick J. Wong
2020-05-23 11:36 ` Christoph Hellwig
2020-05-22 4:04 ` [PATCH 00/24] xfs: rework inode flushing to make inode reclaim fully asynchronous Dave Chinner
2020-05-23 16:18 ` Darrick J. Wong
2020-05-23 21:22 ` Dave Chinner
2020-05-22 6:18 ` Amir Goldstein
2020-05-22 12:01 ` Amir Goldstein
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