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

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

BERTRAND Joël wrote:
> David Miller wrote:
>> From: BERTRAND_Joël <joel.bertrand@systella.fr>
>> Date: Tue, 10 Jul 2007 09:53:12 +0200
>>
>>>     When clamav-daemon (or all other daemons) remain in sleep mode, I 
>>> cannot quickly restart this daemon by /etc/init.d/$(daemon) restart, 
>>> I have to wait for a timeout.
>>
>> Use the kernel sysrq keystrokes to get a task dump to see where
>> clamav-daemon is sleeping,
> 
>     I will try tomorrow. I have to build a 2.6.22 (to see if nis works 
> because it doesn't with 2.6.22-rc7).

	Tests made with a 2.6.22.1 (NIS works with 2.6.22.1 and not with 
2.6.22-rc7, but I don't know why... ;-) )

>> my suspicion is that it is stuck
>> in the kernel futex code somewhere.
> 
>     I think too.

	When I write these lines, my mail server is blocked due to clamd socket 
trouble :

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.

	Regards,

	JKB