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.