From: Dave Chinner <david@fromorbit.com>
To: Shaohua Li <shli@kernel.org>
Cc: hch@infradead.org, xfs@oss.sgi.com
Subject: Re: [RFC]xfs: using GFP_NOFS for blkdev_issue_flush
Date: Wed, 18 Apr 2012 11:37:46 +1000 [thread overview]
Message-ID: <20120418013746.GL6734@dastard> (raw)
In-Reply-To: <4F8BC30D.5040601@kernel.org>
On Mon, Apr 16, 2012 at 02:58:21PM +0800, Shaohua Li wrote:
> On 4/16/12 2:49 PM, Shaohua Li wrote:
> >
> >flush request is issued in transaction commit code path usually, so
> >looks using
> >GFP_KERNEL to allocate memory for flush request bio falls into the classic
> >deadlock issue (memory reclaim recursion). Use GFP_NOFS to avoid recursion
> >from reclaim context. Per Dave Chinner, there is only blkdev_issue_flush
> >might
> >be buggy here. But using GFP_NOFS by default for all calls should not
> >matter.
Can you update the commit message like I suggested previously?
Cheers,
Dave.
--
Dave Chinner
david@fromorbit.com
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next prev parent reply other threads:[~2012-04-18 1:37 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-04-16 6:49 [RFC]xfs: using GFP_NOFS for blkdev_issue_flush Shaohua Li
2012-04-16 6:58 ` Shaohua Li
2012-04-17 18:42 ` Mark Tinguely
2012-04-18 1:37 ` Dave Chinner [this message]
2012-04-24 13:23 ` Shaohua Li
2012-04-25 0:25 ` Dave Chinner
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