diskio / filesystem related deadlock on SMP 6.0-STABLE machine.

[Atanas]

Kris Kennaway said the following on 1/26/2006 3:46 PM:
> On Thu, Jan 26, 2006 at 06:44:22PM -0500, Kris Kennaway wrote:
>> On Thu, Jan 26, 2006 at 06:37:16PM -0500, Mike Jakubik wrote:
>>> Kris Kennaway wrote:
>>>> On Thu, Jan 26, 2006 at 05:07:56PM +0200, Niki Denev wrote:
>>>>  
>>>>> On Thursday 26 January 2006 10:40, Niki Denev wrote:
>>>>>    
>>>>> [...]
>>>>>
>>>>> After i disabled option QUOTA in both my default kernel config
>>>>> and the one i compiled with the debugging options i was unable
>>>>> to reproduce the deadlock again. (i hope it stays that way :) )
>>>>> This, together with the report in my previous post probably point
>>>>> that the problem is in the QUOTA support.
>>>>>    
>>>> Actually, I think this is known.
>>>>
>>>> Kris
>>>>  
>>> Well thats good to know, i was planning on upgrading a production box 
>>> from 5 to 6, its SMP and uses QUOTA. How did 6 get released when QUOTA 
>>> was known to cause deadlocks?
> 
> FYI, you can probably work around this by setting debug.mpsafevfs=0.
> Of course, you'll lose the filesystem performance benefits.
> 
> Kris

I'd like to confirm that setting debug.mpsafevfs=0 (along with 
debug.mpsafevm=0 and debug.mpsafenet=0) doesn't help either.

I ran into the same problem about a month ago on 2 production boxes 
running 6-STABLE (SMP with QUOTA enabled) and the only way I found to 
stop them crashing was switching back to 5.4.

I hope this will get fixed in 6.1.

Regards,
Atanas