linux-kernel - Re: [linux-lvm] 2.6.22-rc4 XFS fails after hibernate/resume

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Date:	Sun, 17 Jun 2007 08:29:51 +1000
From:	David Robinson <zxvdr.au@...il.com>
To:	LVM general discussion and development <linux-lvm@...hat.com>
CC:	"'linux-kernel@...r.kernel.org'" <linux-kernel@...r.kernel.org>,
	xfs@....sgi.com, linux-pm <linux-pm@...ts.osdl.org>
Subject: Re: [linux-lvm] 2.6.22-rc4 XFS fails after hibernate/resume

David Greaves wrote:
> This isn't a regression.
> 
> I was seeing these problems on 2.6.21 (but 22 was in -rc so I waited to 
> try it).
> I tried 2.6.22-rc4 (with Tejun's patches) to see if it had improved - no.
> 
> Note this is a different (desktop) machine to that involved my recent bugs.
> 
> The machine will work for days (continually powered up) without a 
> problem and then exhibits a filesystem failure within minutes of a resume.
> 
> I know xfs/raid are OK with hibernate. Is lvm?

I have LVM working with hibernate w/o any problems (w/ ext3). If there 
were a problem it wouldn't be with LVM but with device-mapper, and I 
doubt there's a problem with either. The stack trace shows that you're 
within XFS code (but it's likely its hibernate).

You can easily check whether its LVM/device-mapper:

1) check "dmsetup table" - it should be the same before hibernating and 
after resuming.

2) read directly from the LV - ie, "dd if=/dev/mapper/video_vg-video_lv 
of=/dev/null bs=10M count=200".

If dmsetup shows the same info and you can read directly from the LV I 
doubt it would be a LVM/device-mapper problem.

Cheers,
Dave
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