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Hi again, some more tests report.
I've tried 2.6.8-smp and CPU load is 0.0, synchronization seems to
work, but when I do a "heartbeat stop" to force the failover to backup
node node2, node2 suddenly locked! no messages at console, a hard
reset was needed.
So I've disabled Hyperthreading on both nodes from the BIOS (they are
HP DL380G4), installed 2.6.11 UP (always Debian Kernel) and the load
is always high as with SMP kernel setup (2.00 or more), but failover
and failback works fine.
One note about hardware: the boxes have 2 Intel Dual-Gbit PCI NIC
while the onboard NIC are 2 Broadcom NetXtreme BCM5704. With the 2.6.8
kernel the driver was tg3, while with 2.6.11 the driver is bcm5700. I
don't know if this could be an issue.
I'm a bit worried about this behaviour.
Is there someone with a similar setup who can report about hardware
and software version?
TIA.
Kind regards,
Luca
On 09/09/05, Luca Maranzano <liuk001@xxxxxxxxx> wrote:
> Thanks to all for the replies.
>
> For Bruce Rosenthal: I cannot strace the ipvs_syncmaster since it is a
> kernel thread and strace IMVHO doesn't work.
>
> I'm doing some tests with Debian kernel 2.6.8-2-686-smp and the
> daemons starts and CPU load is very low (near 0.0) as it should be.
>
> For Horms: I've tryed also non-SMP kernel 2.6.11 (always debian) and
> the result is the same (100% cpu hog). May be I should try to disable
> Hyperthreading to be sure that it is not the cause. Are you using a
> Debian Kernel 2.6.11 or some other version? (Debian kernels are
> slightly different from stock Linus' kernels)
>
> More later.
> Regards,
> Luca
>
>
>
>
> On 09/09/05, Horms <horms@xxxxxxxxxxxx> wrote:
> > On Thu, Sep 08, 2005 at 07:05:23PM -0400, Roger Tsang wrote:
> > > It has to do with ssleep() waiting in IO. You can tell with ps long format
> > > output. You'd have to switch over to schedule_timeout() like they used to
> > > do
> > > it in kernel-2.4 ipvs. That's what I found on Fedora with kernel-2.6 ipvs
> > > and think you're hitting the same problem.
> >
> > That sounds bad. Does anyone know if this is specific to 2.6.11,
> > specific to hyperthreading? I certainly don't see it on my UP 2.6.11
> > box. I would like to investigate further, but as always, time is against
> > me.
> >
> > --
> > Horms
> > _______________________________________________
> > LinuxVirtualServer.org mailing list - lvs-users@xxxxxxxxxxxxxxxxxxxxxx
> > Send requests to lvs-users-request@xxxxxxxxxxxxxxxxxxxxxx
> > or go to http://www.in-addr.de/mailman/listinfo/lvs-users
> >
>
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