Re: 2.6.20-rc3-mm1: umount reiser4 FS stuck in D state

From: Laurent Riffard <laurent.riffard@free.fr>
To: Jens Axboe <jens.axboe@oracle.com>
Cc: "Vladimir V. Saveliev" <vs@namesys.com>,
	reiserfs-list@namesys.com,
	Kernel development list <linux-kernel@vger.kernel.org>
Subject: Re: 2.6.20-rc3-mm1: umount reiser4 FS stuck in D state
Date: Tue, 23 Jan 2007 19:21:40 +0100	[thread overview]
Message-ID: <45B65234.4000203@free.fr> (raw)
In-Reply-To: <20070123154617.GE11995@kernel.dk>

Le 23.01.2007 16:46, Jens Axboe a écrit :
> On Tue, Jan 23 2007, Vladimir V. Saveliev wrote:
>> Hello
>>
>> On Saturday 13 January 2007 01:56, Laurent Riffard wrote:
>>> Le 06.01.2007 19:58, Vladimir V. Saveliev a écrit :
>>>> Hello
>>>>
>>>> On Saturday 06 January 2007 13:58, Laurent Riffard wrote:
>>>>> Hello,
>>>>>
>>>>> got this with 2.6.20-rc3-mm1:
>>>>>
>>>>> =======================
>>>>> SysRq : Show Blocked State
>>>>>
>>>>>                          free                        sibling
>>>>>   task             PC    stack   pid father child younger older
>>>>> umount        D C013135E  6044  1168   1150                     (NOTLB)
>>>>>        de591ae4 00000086 de591abc c013135e dff979c8 c012a6fe 00000046 00000007 
>>>>>        dfd94ac0 128d3000 00000026 00000000 dfd94bcc dff979c8 de591ae4 dffda038 
>>>>>        00000002 dff979c0 dff979bc dff979c8 de591b10 c012d600 dff979f8 00000000 
>>>>> Call Trace:
>>>>>  [<c012d600>] synchronize_qrcu+0x70/0x8c
>>>>>  [<c01bede4>] __make_request+0x4c/0x29b
>>>>>  [<c01bd24b>] generic_make_request+0x1b0/0x1de
>>>>>  [<c01bf354>] submit_bio+0xda/0xe2
>>>>>  [<e12674bd>] write_jnodes_to_disk_extent+0x920/0x974 [reiser4]
>>>>>  [<e12678dd>] update_journal_footer+0x29f/0x2b7 [reiser4]
>>>>>  [<e1268b65>] write_tx_back+0x149/0x185 [reiser4]
>>>>>  [<e126a8e7>] reiser4_write_logs+0xea4/0xfd2 [reiser4]
>>>>>  [<e125626a>] try_commit_txnh+0x7e6/0xa4f [reiser4]
>>>>>  [<e125661b>] reiser4_txn_end+0x148/0x3cf [reiser4]
>>>>>  [<e12568ad>] reiser4_txn_restart+0xb/0x1a [reiser4]
>>>>>  [<e125692f>] reiser4_txn_restart_current+0x73/0x75 [reiser4]
>>>>>  [<e1256b89>] force_commit_atom+0x258/0x261 [reiser4]
>>>>>  [<e1257703>] txnmgr_force_commit_all+0x406/0x697 [reiser4]
>>>>>  [<e12e5e08>] release_format40+0x10c/0x193 [reiser4]
>>>>>  [<e1279922>] reiser4_put_super+0x134/0x16a [reiser4]
>>>>>  [<c015c930>] generic_shutdown_super+0x55/0xd8
>>>>>  [<c015c9d3>] kill_block_super+0x20/0x32
>>>>>  [<c015ca75>] deactivate_super+0x3f/0x51
>>>>>  [<c016d903>] mntput_no_expire+0x42/0x5f
>>>>>  [<c0160f37>] path_release_on_umount+0x15/0x18
>>>>>  [<c016df77>] sys_umount+0x1a3/0x1cb
>>>>>  [<c016dfb8>] sys_oldumount+0x19/0x1b
>>>>>  [<c0103ed2>] sysenter_past_esp+0x5f/0x99
>>>>>  =======================
>>>>>
>>>>> Scenario:
>>>>> - umount a reiser4 FS (no need to write something before)
>>>> Hmm, I can not reproduce this with 2.6.20-rc3-mm1. Probably I need to config the kernel more close to your system.
>>>>
>>>>> Earlier kernels were OK.
>>> This still happens with 2.6.20-rc4-mm1...
>>>
>>> Should I open a bug report at http://bugzilla.kernel.org?
>>>
>> Which device with reiser4 did you try to umount?  Jens wrote that it
>> could be a barrier related. If there are no multidevices involved -
>> please report to bugzilla.
> 
> Make sure that your kernel contains this fix:
> 
> http://git.kernel.dk/?p=linux-2.6-block.git;a=commitdiff;h=4af09c42ee1af70356471f51c1f40c1ff7881b68;hp=036f6008f43b5b4dd8c825365f15434d75005c6d
> 
> I think it missed 2.6.20-rc3-mm1. Again, that assumes you are using md
> or dm.

I've got 2 reiser4 FS:
- one with /dev/sdb6
- the other with /dev/vglinux1/ccache (vglinux1 is built on /dev/sda4 
and /dev/sdb7).
There is no md here, only dm.

I applied the above patch on top of 2.6.20-rc4-mm1, but the problem 
still happens with the two devices.

thanks
-- 
laurent