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On Thu, Jan 19, 2006 at 08:57:41AM -0800, Fong Vang wrote:
> On 1/19/06, Plant, Dean <dean.plant@xxxxxxxxxx> wrote:
> > Fong Vang wrote:
> > > I have a total of 20 CentOS 4.1 systems running on fairly new
> > > hardware. About 6 of them are experiencing strange hangs without any
> > > indication -- nothing in /var/log/messages nor on the console --
> > > sometime within 10-30 minutes after a reboot. The systems still
> > > responds to ping but you can't ssh to it. At the console, you could
> > > type "root" at the user prompt but it hangs immediately after hitting
> > > enter.
> > >
> > > Memory scan of all systems show no error.
> > >
> > > Any idea how to troubleshoot this problem. The system's not
> > > responsive to do any troubleshooting and nothing abnormal is in the
> > > log.
> > >
> > > We running htis kernel: kernel-smp-2.6.9-11.EL.i686.rpm.
> >
> > Have you tried disabling hyperthreading? I had suffered this problem
> > when we started buying Intel Xeon's, disabling HT'ing seemed to fix the
> > problem for me.
>
> Some people suggested that too. I'm asking for two of these systems
> to be sent back from our remote data center. I'll try it then.
>
> Did you just ended up running without hyperthreading? Did you ever
> find a solution? It seems an awful waste if you can't use it.
Disabling HT only solves it on single processor systems.
- --
Rodrigo Barbosa <rodrigob@xxxxxxxxxxxxxxx>
"Quid quid Latine dictum sit, altum viditur"
"Be excellent to each other ..." - Bill & Ted (Wyld Stallyns)
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