[CentOS] System hangs silently

Fong Vang sudoyang at gmail.com
Wed Jan 18 20:15:41 UTC 2006


On 1/18/06, Rodrigo Barbosa <rodrigob at suespammers.org> wrote:
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> On Wed, Jan 18, 2006 at 11:38:38AM -0800, Fong Vang wrote:
> > We running htis kernel: kernel-smp-2.6.9-11.EL.i686.rpm.
>
> I have a fairly good idea what it is: context switch storm.
>
> We have been seeing it for quite some time. Always Intel hardware, usually
> Xeons, but sometimes P4 HTs too. It is a known condition, even tho
> the bug itself is still elusive. Could be either related to the
> processor or the northbridge.

Are you supposed to see this abnomally when using vmstat to see
context switch rate?  I'm only see < 150 on these machines (but
they're functioning now so maybe we just haven't trigger the
abnomally?).

We are using dual Xeons.

Which kernel would you recommend?  I guess we'll have to try the
kernel from CentOS 4.2.

> So far, the only way to stop the problem is switching to a non-smp
> Kernel.
>
> Best Regards,
>
> - --
> Rodrigo Barbosa <rodrigob at suespammers.org>
> "Quid quid Latine dictum sit, altum viditur"
> "Be excellent to each other ..." - Bill & Ted (Wyld Stallyns)
>
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