From mboxrd@z Thu Jan  1 00:00:00 1970
From: Ryusuke Konishi <ryusuke-sG5X7nlA6pw@public.gmane.org>
Subject: Re: nilfs_sufile_do_cancel_free: segment 0 must be clean
Date: Mon, 22 Mar 2010 15:04:20 +0900 (JST)
Message-ID: <20100322.150420.179960388.ryusuke@osrg.net>
References: <4BA54677.3090902@abeckmann.de>
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Hi,
On Sat, 20 Mar 2010 23:04:39 +0100, Andreas Beckmann wrote:
> Hi,
> 
> I just tried to benchmark nilfs and then the file system and benchmark
> process got stuck. dmesg output is attached. The problems start with
> 
> nilfs_sufile_do_cancel_free: segment 0 must be clean
> nilfs_sufile_do_cancel_free: segment 1 must be clean
> NILFS warning (device sdb1): nilfs_clean_segments: segment construction
> failed. (err=-28)
> 
> I'm using
> 
> Kernel 2.6.33 (Debian 2.6.33-1~experimental.2)
> nilfs-tools 2.0.16 (Debian 2.0.16-1)
> 
> The processes are unkillable and the file system cannot be unmounted.
> The machine will be reset when I get back in physical range on Wednesday
> and the stuck file system will be removed. If there is anything I can do
> remotely to help you debug that problem before the file system is gone,
> let me know.
> 
> The file system got into this state after writing several times the
> capacity of the file system, creating a single file until the file
> cannot be extended any more.
> 
> # df -k /dev/sdb1
> Filesystem           1K-blocks      Used Available Use% Mounted on
> /dev/sdb1            136716284 136372220         0 100% /stxxl/sdb
> 
> Can't do a ls on the file systen, gets stuck as well.
> 
> 
> Please keep me CCed, I'm not on the list.
> 
> 
> Andreas

Thank you for the detail report!

I could reproduce the both problems (i.e. the warnings on
"nilfs_sufile_do_cancel_free" and the hang of cleaner process) by a
manual fault injection test.

Will look into these issues.

Ryusuke Konishi
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