Re: Software RAID1 deadlock in 2.6.25 kernels

[Mike McCarthy <mike@w1nr.net>]

Gabor Gombas wrote:
> On Sat, Jun 28, 2008 at 06:47:29AM +1000, Neil Brown wrote:
>
>   
>>>    System locks up after running a short time.  Had it hang once during 
>>> installation.  Tried both Reiserfs and EXT3.
>>>       
>> We need more details about the lockup.  Does the whole system lock up,
>> or just the array.
>> Can  you get
>>    alt-sysrq-T
>> output?  That might be useful.
>>     
>
> Also, try to set up netconsole and boot with nmi_watchdog=2. I've now 3
> completely different HW setups where 2.6.25 hangs due to HPET issues.
>
> Gabor
>
>   
Due to time constraints, I will be unable to do much on this until the 
weekend.

In the meantime, a more detailed description of the symptoms:

When the system hangs, the mouse movement is tracked across the screen 
and I can ping the node. There is no response to clicking on a mouse 
button or trying to type anything into a field. It also does not respond 
to ssh or to <CTRL><ALT><F1>.

I may also try and reproduce it on different hardware to rule out a 
graphics problem if you wish.

Mike