linux-ext4 - Re: All processes accessing etx4 partition stuck in 'D' state

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Mon, 19 Jan 2009 07:43:05 -0500
From:	Theodore Tso <tytso@....edu>
To:	Graham Murray <graham@...rray.org.uk>
Cc:	linux-ext4@...r.kernel.org
Subject: Re: All processes accessing etx4 partition stuck in 'D' state

On Mon, Jan 19, 2009 at 06:47:45AM +0000, Graham Murray wrote:
> I do not know if this is ext4 related or not, so my apologies if it is
> not.
> 
> I am running the latest linus 2.6.29-rc2 git kernel together with the
> master branch of the ext4 git tree announced here a couple of days ago.
> 
> Yesterday evening, all processes accessing /home which is formatted as
> ext4 (created as ext4 under 2.6.26 with the ext4 patches applied, not
> converted from ext3) were stuck in 'D' state and top showed both cores
> of the core2 CPU in 100% Waiting state. Everything not accessing /home
> was responsive. To eliminate a physical problem I ran a SMART self-test
> on the drive containing /home and it passed with no errors. / is also
> etx4, but was converted from ext3. There were no kernel messages, just
> the hung processes. The system would not reboot normally (because of the
> processes in 'D' state), but following sysrq sync, mount r/o and reboot,
> the filesystem showed as clean when restarted. To be sure, the first
> thing I did was to unmount it and manually ran fsck -f and that did not
> report any problems. 

If this happens again, could you use sysrq-l and capture resulting the
stack backtraces?  That would help determine what parts of the kernel
are responsible.

Regards,

							- Ted
--
To unsubscribe from this list: send the line "unsubscribe linux-ext4" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html