Re: Reiser4/2.6.11 dbench hang

[Christian Mayrhuber <christian.mayrhuber@gmx.net>]

David Masover schrieb:
> sergey ivanov wrote:
> 
>>>So how about this deadlock? Is there any expectation about fix for it?
>>>    Wbr,
>>>        Sergey.
>>>
>>>Christian Mayrhuber wrote:
>>>
>>>
>>>>Vladimir Saveliev schrieb:
>>>>
>>>>
>>>>>This problem is fixed, but running your test during several hours caused
>>>>>reiser4 crash. It just happened, so, tomorrow I will take a look at it.
>>>>>
>>>>
>>>>I was able to deadlock kernel 2.6.11 + reiser4-for-2.6.11-3.patch.gz
>>>>+ elevator=cfq.
> 
> 
> Is it just with elevator=cfq?
> 
> BTW, I heard something about anticipatory being bad (IO only goes one
> way at a time).  Is this true?
> 

I couldn't reproduce the deadlock with
kernel 2.6.11 + reiser4-for-2.6.11-3.patch.gz + anticipatory
scheduler while running dbench for 4 hours.
With cfq it deadlocked during the first cleanup phase of dbench
(running with 90 clients).

Note: With AS the system was nearly unuseable when running dbench.
Issuing "su" on the shell lasted 34 seconds till the password
prompt appeared.

-- 
lg, Chris