Subject: Re: [PATCH 02/27] xfs: re-enable non-blocking behaviour in
 xfs_map_blocks
From: Alex Elder <aelder@sgi.com>
Reply-To: <aelder@sgi.com>
To: Christoph Hellwig <hch@infradead.org>
CC: <xfs@oss.sgi.com>
In-Reply-To: <20110701094602.465074143@bombadil.infradead.org>
References: <20110701094321.936534538@bombadil.infradead.org>
	 <20110701094602.465074143@bombadil.infradead.org>
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Date: Tue, 5 Jul 2011 17:35:19 -0500
Message-ID: <1309905319.1950.48.camel@doink>
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On Fri, 2011-07-01 at 05:43 -0400, Christoph Hellwig wrote:
> The non-blockig behaviour in xfs_map_blocks currently is conditional on
> having both the WB_SYNC_NONE sync_mode and the nonblocking flag set.
> The latter used to be used by both pdflush, kswapd and a few other places
> in older kernels, but has been fading out starting with the introduction
> of the per-bdi flusher threads.
> 
> Enable the non-blocking behaviour for all WB_SYNC_NONE calls to get back
> the behaviour we want.

The subject line should refer to xfs_vm_writepage()
(not xfs_map_blocks()).  Unless I hear otherwise I
will plan to change that for you.

Other than that this looks OK to me.

Signed-off-by: Alex Elder <aelder@sgi.com>


> Signed-off-by: Christoph Hellwig <hch@lst.de>