From: Christoph Hellwig <hch@infradead.org>
To: Dave Chinner <david@fromorbit.com>
Cc: Sweet Tea Dorminy <sweettea@permabit.com>, linux-xfs@vger.kernel.org
Subject: Re: XFS journal write ordering constraints?
Date: Tue, 13 Jun 2017 23:46:19 -0700 [thread overview]
Message-ID: <20170614064619.GA3598@infradead.org> (raw)
In-Reply-To: <20170613221647.GG17542@dastard>
On Wed, Jun 14, 2017 at 08:16:47AM +1000, Dave Chinner wrote:
> Yes, that's my understanding, too, but I also thought that multiple
> outstanding flushes are ordered by the block layer. i.e. flushes can
> be reordered against other operations, but not other flushes.
There is no such guarantee. For request based drivers some ordering
happens in practice, but that's an implementation artifact and not
a gurantee, and for bio based drivers all bets are off.
next prev parent reply other threads:[~2017-06-14 6:46 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-06-08 15:42 XFS journal write ordering constraints? Sweet Tea Dorminy
2017-06-09 12:38 ` Brian Foster
2017-06-09 17:30 ` Brian Foster
2017-06-09 23:44 ` Dave Chinner
2017-06-10 2:06 ` Sweet Tea Dorminy
2017-06-12 14:55 ` Brian Foster
2017-06-12 16:18 ` Brian Foster
2017-06-15 22:28 ` Sweet Tea Dorminy
2017-06-16 13:42 ` Brian Foster
2017-06-12 23:50 ` Dave Chinner
2017-06-13 14:14 ` Sweet Tea Dorminy
2017-06-13 22:16 ` Dave Chinner
2017-06-14 6:46 ` Christoph Hellwig [this message]
2017-06-13 16:29 ` Brian Foster
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