2003-08-19 19:48:04

by Rock Gordon

Subject: init consumes 99% cpu, syslog Z

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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2003-08-19 20:29:35

by J.A. Magallon

Subject: Re: init consumes 99% cpu, syslog Z

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 <[email protected]> \ 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))

2003-08-19 20:32:43

by Rock Gordon

Subject: Re: init consumes 99% cpu, syslog Z

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

--- "J.A. Magallon" <[email protected]> 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 <[email protected]> \
> 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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