Dead lock with 2.6.20

Dead lock with 2.6.20

[BERTRAND Joël]

	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...

	Regards,

	JKB

Re: Dead lock with 2.6.20

[Daniel Smolik]

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 ? Do you try STOP-A ? 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.

			Dan

Re: Dead lock with 2.6.20

[BERTRAND Joël]

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 ?

	Regards,

	JKB

Re: Dead lock with 2.6.20

[Daniel Smolik]

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.

				Dan

Re: Dead lock with 2.6.20

[BERTRAND Joël]

Daniel Smolik a écrit :
>>> 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.

fermat:[~] > lsmod | grep sg
sg                     42224  0

	I have turned off udev to test.

	JKB

Re: Dead lock with 2.6.20

[BERTRAND Joël]

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.

	Somes news. I have tried a 2.6.18 (built by debian) kernel. Same bug. 
Thus, I have restart this U2 in runlevel 1 to purge mail spool by

	rm -rf /var/spool/mqueue

and the system hangs. System hangs on heavy disk I/O load... I have 
removed sg module to test.

	Regards,

	JKB

Re: Dead lock with 2.6.20

[BERTRAND Joël]

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

Re: Dead lock with 2.6.20

[BERTRAND Joël]

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.

	Some news.

1/ I have built a monolithic 2.4.34.1 kernel. With this kernel, I only 
see a "kernel unaligned trap" but not any dead lock. After this trap, 
kernel hangs but the U2 can be restarted with stop+A ;
2/ I have tested hardware with SUNvts and it sounds good ;
3/ I'm building a 2.6.20.2 with all debug options to debug ;
4/ I have tried without udev, sg, and success.

	Regards,

	JKB