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Re: XFS / writeback invoking soft lockup.

To: Christoph Hellwig <hch@xxxxxxxxxxxxx>
Subject: Re: XFS / writeback invoking soft lockup.
From: Dave Jones <davej@xxxxxxxxxx>
Date: Fri, 13 Dec 2013 11:22:28 -0500
Cc: Dave Chinner <david@xxxxxxxxxxxxx>, Linux Kernel <linux-kernel@xxxxxxxxxxxxxxx>, xfs@xxxxxxxxxxx
Delivered-to: xfs@xxxxxxxxxxx
In-reply-to: <20131213111639.GD23546@xxxxxxxxxxxxx>
Mail-followup-to: Dave Jones <davej@xxxxxxxxxx>, Christoph Hellwig <hch@xxxxxxxxxxxxx>, Dave Chinner <david@xxxxxxxxxxxxx>, Linux Kernel <linux-kernel@xxxxxxxxxxxxxxx>, xfs@xxxxxxxxxxx
References: <20131213071407.GA6527@xxxxxxxxxx> <20131213104853.GS10988@dastard> <20131213111639.GD23546@xxxxxxxxxxxxx>
User-agent: Mutt/1.5.21 (2010-09-15)
On Fri, Dec 13, 2013 at 03:16:39AM -0800, Christoph Hellwig wrote:
 > On Fri, Dec 13, 2013 at 09:48:53PM +1100, Dave Chinner wrote:
 > > All I can say is that there doesn't look to be any obvious signs
 > > that this is a XFS or writeback problem fom the stack trace, and
 > > without more information or a reproducable test case I'm not going
 > > to be able to understand the cause.
 > > 
 > > Is the problem reproducable, or is it just a one-off?
 > 
 > If it's reproducable it would be good to enable the xfs_writepage
 > tracepoint and get a trace-cmd log of it.

I hit it pretty reliably last night.  I'll make a note to look into it 
on monday with that enabled.

        Dave

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