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Date:	Tue, 2 Dec 2008 15:58:53 +0100
From:	Andres Freund <>
To:	Theodore Tso <>, Andreas Dilger <>
Cc:	LKML <>,
Subject: Re: EXT4 ENOSPC Bug

Hi Ted, Hi Andreas,

On Tuesday 02 December 2008 08:57:12 Theodore Tso wrote:
> So.... could you apply this patch, attached below.  You can trigger it
> using the attached program, debug-ioctl.  If the filesystem is
> quiscent, and you've typed sync once or twice, you should get the
> following in your printk logs:
Ok. The system now runs (without problems) with the patch enabled and I can 
get the debug output.
30 Minutes after boot the system still returns to zero dirty blocks and the 
free blocks seem to stay in a sensible range.
I will let it run for a while and report back if either something interesting 
happens or the problem reappears and I am seeing no significant amount of dirty 


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