From: Christoph Hellwig <hch@infradead.org>
To: Dave Chinner <david@fromorbit.com>
Cc: Christoph Hellwig <hch@infradead.org>, xfs@oss.sgi.com
Subject: Re: [PATCH 1/5] xfs: take the ilock around xfs_bmapi_read in xfs_zero_remaining_bytes
Date: Thu, 5 Dec 2013 12:40:08 -0800 [thread overview]
Message-ID: <20131205204008.GA7686@infradead.org> (raw)
In-Reply-To: <20131205203115.GA29897@dastard>
On Fri, Dec 06, 2013 at 07:31:15AM +1100, Dave Chinner wrote:
> This now holds the ilock over data IO, which is not allowed to be
> done as data IO completion can require the ilock to be taken. Yes,
> the code specifically avoids all these problems, but the general
> rule is that ilock is only held over metadata IO operations, not
> data IO. If we need data IO serialisation, then we use the iolock.
And we already hold the iolock here. So yeah, we probably should
just move it to protect the xfs_bmapi_read call only.
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next prev parent reply other threads:[~2013-12-05 20:40 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-12-05 15:58 [PATCH 0/5] extent list locking fixes Christoph Hellwig
2013-12-05 15:58 ` [PATCH 1/5] xfs: take the ilock around xfs_bmapi_read in xfs_zero_remaining_bytes Christoph Hellwig
2013-12-05 19:38 ` Ben Myers
2013-12-05 20:31 ` Dave Chinner
2013-12-05 20:37 ` Ben Myers
2013-12-05 20:40 ` Christoph Hellwig [this message]
2013-12-05 15:58 ` [PATCH 2/5] xfs: use xfs_ilock_map_shared in xfs_qm_dqtobp Christoph Hellwig
2013-12-05 19:46 ` Ben Myers
2013-12-05 20:41 ` Dave Chinner
2013-12-05 20:53 ` Christoph Hellwig
2013-12-05 21:03 ` Dave Chinner
2013-12-05 15:58 ` [PATCH 3/5] xfs: use xfs_ilock_map_shared in xfs_qm_dqiterate Christoph Hellwig
2013-12-05 19:48 ` Ben Myers
2013-12-05 20:45 ` Dave Chinner
2013-12-05 15:58 ` [PATCH 4/5] xfs: use xfs_ilock_map_shared in xfs_attr_get Christoph Hellwig
2013-12-05 19:57 ` Ben Myers
2013-12-05 20:59 ` Dave Chinner
2013-12-05 21:01 ` Christoph Hellwig
2013-12-05 21:05 ` Dave Chinner
2013-12-05 21:10 ` Christoph Hellwig
2013-12-05 21:17 ` Dave Chinner
2013-12-05 15:58 ` [PATCH 5/5] xfs: assert that we hold the ilock for extent map access Christoph Hellwig
2013-12-05 20:11 ` Ben Myers
2013-12-05 21:10 ` Dave Chinner
2013-12-05 21:22 ` Christoph Hellwig
2013-12-05 21:40 ` Dave Chinner
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