Re: kernel BUG at fs/reiser4/block_alloc.c:151

["Marcin Baczyński" <marbacz@gmail.com>]

W dniu 9 lutego 2011 03:37 użytkownik Edward Shishkin
<edward.shishkin@gmail.com> napisał:
> On 02/09/2011 01:10 AM, Edward Shishkin wrote:
>>
>> On 02/09/2011 12:56 AM, Marcin Baczyński wrote:
>>>
>>> W dniu 8 lutego 2011 23:36 użytkownik Edward Shishkin
>>> <edward.shishkin@gmail.com> napisał:
>>>>
>>>> Marcin Baczyński wrote:
>>>>>
>>>>> Hi,
>>>>>
>>>>
>>>> Hello.
>>>>
>>>>> I'm attaching a trace of kernel BUG that Firefox hits. It's 100%
>>>>> reproducible,
>>>>> every time I start the browser it hits the bug within several seconds,
>>>>> then
>>>>> whole system hangs. However I've never triggered the problem with any
>>>>> other
>>>>> application.
>>>>> I've tested 2.6.37-gentoo-hardened + reiser4 patch,
>>>>
>>>> "2.6.37-gentoo-hardened" is based on what vanilla kernel (.36 or .37)?
>>>
>>> It's based on .37.
>>>
>>>>
>>
>>
>> [<ffffffff81142782>] ? grabbed2flush_reserved_nolock+0x42/0xa0
>> [<ffffffff81144c54>] ? jnode_make_dirty_locked+0xe4/0x190
>> [<ffffffff81144d31>] ? znode_make_dirty+0x31/0xe0
>> [<ffffffff81166a69>] ? find_disk_cluster+0x359/0x390
>> [<ffffffff8117511c>] ? do_readpage_ctail+0xdc/0x570
>> [<ffffffff81166f7d>] ? prepare_logical_cluster+0x23d/0x760
>>
>> A set of blocks reserved in prepare_logical_cluster() is exhausted
>> at znode_make_dirty() for some reasons. No ideas except inserting
>> debugging messages to figure out who is stealing the reservation.
>
>
> Aaahhh, it seems I understand what's up..
> Could you please apply the attached patch, run
> Firefox and send me kernel warnings?

Here they are (kernel with patch applied + reiser4_debug=y):
reiser4[firefox(2497)]: find_disk_cluster
(fs/reiser4/plugin/file/cryptcompress.c:2197)[edward-2222]:
WARNING: file 404669 consists of 1020 fragments
reiser4[firefox(2497)]: find_disk_cluster
(fs/reiser4/plugin/file/cryptcompress.c:2197)[edward-2222]:
WARNING: file 18693127 consists of 1020 fragments

But there are thousands of them, and not all are caused by Firefox:
reiser4[bash(2708)]: find_disk_cluster
(fs/reiser4/plugin/file/cryptcompress.c:2197)[edward-2222]:
WARNING: file 17649897 consists of 1020 fragments
reiser4[xz(2708)]: find_disk_cluster
(fs/reiser4/plugin/file/cryptcompress.c:2197)[edward-2222]:
WARNING: file 17649897 consists of 1020 fragments

And among thousands of these 1020-fragments, there are
6 probably more intresting warns:

6542-reiser4[firefox(2518)]: find_disk_cluster
(fs/reiser4/plugin/file/cryptcompress.c:2197)[edward-2222]:
6543:WARNING: file 404690 consists of 21 fragments
6544-reiser4[firefox(2518)]: find_disk_cluster
(fs/reiser4/plugin/file/cryptcompress.c:2197)[edward-2222]:
6545:WARNING: file 404690 consists of 31 fragments
--
9297-reiser4[firefox(2518)]: find_disk_cluster
(fs/reiser4/plugin/file/cryptcompress.c:2197)[edward-2222]:
9298:WARNING: file 404690 consists of 21 fragments
9299-reiser4[firefox(2518)]: find_disk_cluster
(fs/reiser4/plugin/file/cryptcompress.c:2197)[edward-2222]:
9300:WARNING: file 404690 consists of 31 fragments
--
9453-reiser4[firefox(2518)]: find_disk_cluster
(fs/reiser4/plugin/file/cryptcompress.c:2197)[edward-2222]:
9454:WARNING: file 404690 consists of 29 fragments
--
9847-reiser4[firefox(2518)]: find_disk_cluster
(fs/reiser4/plugin/file/cryptcompress.c:2197)[edward-2222]:
9848:WARNING: file 404690 consists of 21 fragments

I don't see any asserts in dmesg. And this time there was no BUG.
If more of these warning would be of any use, I can send them as well,
but compressed log is >60kB, so not attaching it now.

Thanks,
Marcin
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