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Date: Fri, 30 Jan 2009 19:09:17 -0500
From: Theodore Tso <tytso@mit.edu>
To: Alex Buell <alex.buell@munted.org.uk>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Fw: 2.6.27 & ext4 strangeness
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On Fri, Jan 30, 2009 at 07:47:02PM +0000, Alex Buell wrote:
> 
> As this has happened three times in the last 24 hours, I thought I'd
> report this. Whenever my laptop locks up, I have to powercycle. After
> rebooting, and fsck.ext4 reports a clean filesystem, often I get a 'no
> space on device' error even though I have plenty of disk space left.
> Another reboot with a forced fsck.ext4 cures this, every time. This only
> happens with ext4 filesystems used as the root filesystem. 

If you can reproduce this, can you send me the output of "df /; df -i
/; dumpe2fs /dev/XXX" (where XXX is your root device) before you
reboot and force an fsck?  And then can you send me the output of "df
/ ; df -i /; dumpe2fs /dev/XXX" after the 2nd reboot and forced fsck.
I've never seen anything like this, so I don't know what to make of it.

It also would be interesting to see if you can reproduce it running a
kernel from the ext4-stable branch of the ext4 tree:

   git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git
   http://git.kernel.org/?p=linux/kernel/git/tytso/ext4.git

This has all of the ext4 fixes that is in the latest mainline, based
on the 2.6.28 kernel.

Thanks for reporting your observations,

							- Ted
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