linux-kernel - Re: linux-2.6.20-rc4-mm1 Reiser4 filesystem freeze and corruption

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Date:	Thu, 01 Feb 2007 18:54:41 +0300
From:	Edward Shishkin <edward@...esys.com>
To:	Zan Lynx <zlynx@....org>, Andrew Morton <akpm@...l.org>
CC:	"Vladimir V. Saveliev" <vs@...esys.com>, reiserfs-list@...esys.com,
	Linux kernel mailing list <linux-kernel@...r.kernel.org>,
	Reiserfs-dev <reiserfs-dev@...esys.com>
Subject: Re: linux-2.6.20-rc4-mm1 Reiser4 filesystem freeze and corruption

Zan Lynx wrote:

>On Sat, 2007-01-20 at 03:34 +0300, Vladimir V. Saveliev wrote:
>  
>
>>Hello
>>
>>On Friday 19 January 2007 20:58, Zan Lynx wrote:
>>    
>>
>>>I have been running 2.6.20-rc2-mm1 without problems, but both rc3-mm1
>>>and rc4-mm1 have been giving me these freezes.  They were happening
>>>inside X and without external console it was impossible to get anything,
>>>plus I was reluctant to test it since the freeze sometimes requires a
>>>full fsck.reiser4 --build-fs to recover the filesystem.
>>>
>>>But I finally got some output in a console session.  I wasn't able to
>>>get it all, I made some notes of what I think the problem is.  I may try
>>>again later once I get netconsole working (netconsole fails as a
>>>built-in, I'll try it as a module next).
>>>      
>>>
>[snip]
>  
>
>>yes, please provide more information. Full kernel output at time of freeze is very desirable.
>>    
>>
>
>Here comes a full sized bug report, as best as I can do it.  This is
>kernel 2.6.20-rc6-mm3 instead of rc4-mm1.  Still has the problem.
>  
>

Thanks for the dump.

>[ 3138.456588]  [<ffffffff8033f5de>] current_atom_finish_all_fq+0x12e/0x280
>[ 3138.456661]  [<ffffffff80296510>] autoremove_wake_function+0x0/0x30
>[ 3138.456674]  [<ffffffff803350ac>] submit_wb_list+0x11c/0x130
>[ 3138.456690]  [<ffffffff80335409>] reiser4_txn_end+0x349/0x530
>[ 3138.456710]  [<ffffffff803355f9>] reiser4_txn_restart+0x9/0x20
>[ 3138.456781]  [<ffffffff80335680>] force_commit_atom+0x50/0x60
>[ 3138.456793]  [<ffffffff8034cfb1>] writepages_unix_file+0x671/0x780
>[ 3138.456824]  [<ffffffff802590b3>] do_writepages+0x43/0x80
>[ 3138.456838]  [<ffffffff8024dbf8>] __filemap_fdatawrite_range+0x58/0x70
>[ 3138.456914]  [<ffffffff8024e19d>] do_fsync+0x3d/0xe0
>[ 3138.456930]  [<ffffffff802c2473>] sys_msync+0x143/0x1f0
>[ 3138.456945]  [<ffffffff8025c11e>] system_call+0x7e/0x83
>  
>

This is waiting for IO completion, and no success because of new plugging
policy introduced by block layer folks. The attached patch should help.
Andrew, please apply.

Thanks,
Edward.


View attachment "reiser4-vs-git-block3.patch" of type "text/x-patch" (1973 bytes)