Re: [sparc64] Strange interaction between 2.6 kernel and 2.5 (and

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

David Miller wrote:
> From: BERTRAND_Joël <joel.bertrand@systella.fr>
> Date: Wed, 11 Jul 2007 12:24:07 +0200
> 
>> Root rayleigh:[/etc/mail] > ps -eLf | grep clamd
>> clamav    3502     1  3502  1    2 10:53 ?        00:01:23 /usr/sbin/clamd
>> clamav    3502     1  7226  0    2 12:00 ?        00:00:00 /usr/sbin/clamd
>> root      8091  5893  8091  0    1 12:18 pts/0    00:00:00 grep clamd
>>
>> 	clamd remains in S mode.
>>
>> 	I have tried to obtain mode information with sysrq+w without any 
>> success, sysrq+w returns no blocked task. In this example, clamd is 
>> blocked, but some other tasks can be blocked.
> 
> This is not enough information to debug this problem, sorry.
> 
> You'll need to do some thinking about what kind of other information
> you can fetch from this stuck process.  Perhaps running
> clamd under strace will provide a good debugging trace so we can
> see exactly what kind of socket it is stuck on, and in what way.

	OK. Now, I run clamd under strace. I hope that it will quickly hang ;-) 
When,clamd hangs, I will post here its strace output. Are there 
significative differences between futex management on sbus and pci 
sparc64 ? I have tried to reproduce this bug on sbus workstation without 
any success, but I can see it on all sparc64/PCI I have (U60, U80, U420)...

	Regards,

	JKB