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Re: [PATCH 02/28] xfs: re-enable non-blocking behaviour in xfs_map_block

To: Christoph Hellwig <hch@xxxxxxxxxxxxx>
Subject: Re: [PATCH 02/28] xfs: re-enable non-blocking behaviour in xfs_map_blocks
From: Dave Chinner <david@xxxxxxxxxxxxx>
Date: Fri, 8 Jul 2011 20:19:15 +1000
Cc: xfs@xxxxxxxxxxx, Alex Elder <aelder@xxxxxxx>
In-reply-to: <20110707110640.863389024@xxxxxxxxxxxxxxxxxxxxxx>
References: <20110707110535.205001532@xxxxxxxxxxxxxxxxxxxxxx> <20110707110640.863389024@xxxxxxxxxxxxxxxxxxxxxx>
User-agent: Mutt/1.5.20 (2009-06-14)
On Thu, Jul 07, 2011 at 07:05:37AM -0400, Christoph Hellwig wrote:
> The non-blockig behaviour in xfs_vm_writepage 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.
> Signed-off-by: Christoph Hellwig <hch@xxxxxx>
> Signed-off-by: Alex Elder <aelder@xxxxxxx>

Reviewed-by: Dave Chinner <dchinner@xxxxxxxxxx>

Dave Chinner

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