linux-kernel - Re: Kernel 2.6.30.4 loop(..?) regression (& with/2.6.31-rc6)

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Message-ID: <20090826212732.GA18124@infradead.org>
Date:	Wed, 26 Aug 2009 17:27:32 -0400
From:	Christoph Hellwig <hch@...radead.org>
To:	Justin Piszcz <jpiszcz@...idpixels.com>
Cc:	Christoph Hellwig <hch@...radead.org>,
	Nikanth Karthikesan <knikanth@...e.de>,
	Jens Axboe <jens.axboe@...cle.com>,
	linux-kernel@...r.kernel.org, xfs@....sgi.com
Subject: Re: Kernel 2.6.30.4 loop(..?) regression (& with/2.6.31-rc6)

On Wed, Aug 26, 2009 at 05:19:11PM -0400, Justin Piszcz wrote:
> For the root filesystem, on / type xfs (rw,noatime)
> For larger partitions (per the cryptoloop doc) the partition itself is  
> setup via cryptoloop and then XFS ontop of that.  Nothing special.

Just to make sure we have all data here - you see the problem only
with loop devices backed by XFS, only with loop devices backed by
raw partitions or with both?

>> Any way to trgiger it with just loop but not crypto, etc.
> Unfortunately not that I am aware of..  Would trying the kernel with the  
> patch removed and mounted with -o nobarrier help to show us anything, or?

Actually, yes - seeing what happens if you run plain 2.6.30 or 2.6.31-rc
without the backout patch, but with -o nobarrier would be very
interesting.
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