Re: Dead lock with 2.6.20

["BERTRAND Joël" <joel.bertrand@systella.fr>]

Daniel Smolik a écrit :
> BERTRAND Joël napsal(a):
>> Daniel Smolik a écrit :
>>
>>> BERTRAND Joël napsal(a):
>>>
>>>>     Hello,
>>>>
>>>>     I have seen a very strange deadlock on a UltraSPARC 2 
>>>> workstation (2 UltraSPARC-II/296 MHz, 2048 MB, framebuffer Creator3D 
>>>> on UPA slot, 2 73 GB SCA disks that form a raid1 array).
>>>>
>>>>     Hardware sounds good and I have tested it with SUNvts during two 
>>>> days without any failure.
>>>>
>>>>     This workstation is a mail server and runs with Debian/testing, 
>>>> kernel 2.6.20. It's a NIS and NFSv3/TCP clients. Its uptime was more 
>>>> than 9 days and it hangs without any message in the log, without 
>>>> panic and without oops. When it hangs, the queue of sendmail was 
>>>> about 3 GB due to a failure of a internet peering. I have rebooted 
>>>> the workstation (power button :-( ). You can find my .config at
>>>>
>>>> http://rayleigh.systella.fr/~bertrand/config-sun4u-2.6.20.gz
>>>>
>>>>     I don't know how debug this bug...
>>>
>>> Hi,
>>> do you have attached console ?
>>
>>
>>     No... I don't have any console.
>>
>>> Do you try STOP-A ?
>>
>>
>>     Stop+A doesn't help. I have tried, of course ;-)
>>
>>> I have similar problem on E450 tomorrow. After each second reboot 
>>> system hang and I can't STOP-A. Only power-off helps. System hang 
>>> after udev insert sg module. I disable udev  and this solve my problem.
>>
>>
>>     Do you think that /etc/init.d/udev stop can solve this trouble ?
> I turn off udev now and it helps.  Test if have or not inserted sg module.

	Hello,

	Without sg module and without udev, 2.6.20 hangs with a dead lock on 
heavy disk IO (maybe a bug in sbus or esp support because I have  a 
U60/SMP that run with the same configuration without any trouble). I 
have tried a 2.6.18, same bug.

	Regards,

	JKB