init consumes 99% cpu, syslog Z

init consumes 99% cpu, syslog Z

[Rock Gordon]

Hi,

I am using linux-2.4.18 (vanilla, from ftp.kernel.org)
on a RedHat 7.3 release. The filesystem is XFS. When
doing heavy I/O (16 processes each writing or reading
between 2 and 5 GB of data to a 2TB XFS filesystem), I
see wierd unsolvable problems -

Firstly, init all of a sudden starts consuming upwards
of 99% cpu (the profiler shows that it spends most of
it's time in the functions
send_sig_info()/force_sig_info()). Pretty soon (10-15
seconds or so), syslogd becomes a zombie, with init
still spinning in R mode.

Absolutely nothing in /var/log/messages; and dmesg
shows nothing either. No visible barfing. And this
goes on and on.

Any process I run after this keeps getting segfaults,
and also ends up becoming a zombie. This problem
repeats exactly on other identical machines.

The system is a dual-CPU 2.4Ghz Dell 2650 machine and
the problems show up without hyperthreading too. The
problem shows up without XFS too.

Any ideas/suggestions?

Thanks and Regards,
Rocky

PS: I am not on the list.

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Re: init consumes 99% cpu, syslog Z

[J.A. Magallon]

On 08.19, Rock Gordon wrote:
> Hi,
> 
> I am using linux-2.4.18 (vanilla, from ftp.kernel.org)
> on a RedHat 7.3 release. The filesystem is XFS.

How do you xfs on a vanilla kernel ? 

;)

-- 
J.A. Magallon <jamagallon@able.es>      \                 Software is like sex:
werewolf.able.es                         \           It's better when it's free
Mandrake Linux release 9.2 (Cooker) for i586
Linux 2.4.22-rc2-jam1m (gcc 3.3.1 (Mandrake Linux 9.2 3.3.1-1mdk))

Re: init consumes 99% cpu, syslog Z

[Rock Gordon]

Well, vanilla in the sense no changes from my side.
The XFS is a patch from SGI website.

--- "J.A. Magallon" <jamagallon@able.es> wrote:
> 
> On 08.19, Rock Gordon wrote:
> > Hi,
> > 
> > I am using linux-2.4.18 (vanilla, from
> ftp.kernel.org)
> > on a RedHat 7.3 release. The filesystem is XFS.
> 
> How do you xfs on a vanilla kernel ? 
> 
> ;)
> 
> -- 
> J.A. Magallon <jamagallon@able.es>      \           
>      Software is like sex:
> werewolf.able.es                         \          
> It's better when it's free
> Mandrake Linux release 9.2 (Cooker) for i586
> Linux 2.4.22-rc2-jam1m (gcc 3.3.1 (Mandrake Linux
> 9.2 3.3.1-1mdk))


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