Hello Daniel.
We've had similar problems, but have received very little feedback
from our machines.
Our setup is also not entirely similar to yours. :-)
Could you try something out?
Set a cron job to run every 1 minute:
cat /proc/slabinfo >> /root/slabinfo.txt
When we do this, our problem gets *much* worse. I'd love to know if
these are similar problems.
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On Mar 2, 2007, at 7:27 PM, Daniel Mealha Cabrita wrote:
hi there,
Does anyone have have suggestions on how to proceed in this case?
I've experiencing dom0 (xen 3.0.3, xen-3.0.4 and 3.0.4-testing)
lockups under
heavy disk load (testing under dom0 directly).
The hardware is a HP ML150 G2 with a HP 4ch SATA fakeraid (OEM
Adaptec 1420SA,
sata_mv driver).
The machine does not respond to network, keyboard not anything
noticeable
when it happens.
I've tried passing a number of parameters to kernel but no
success. The ones
below even make things worse, causing a CPU0 soft lockup during boot:
kernel = (hd0,0)/xen-3.0.4 dom0_mem=384M acpi=off noapic nolapic
The disks runs in Linux kernel RAID5. High load to/from an
individual disk
(the max an individual SATA HD can handle) does not cause any problem.
Also, I've noticed that just after booting the machine does not
respond to
pings nor anything from the network. If I locally ping from that to
another
host, the network starts working. OR, if I wait enough time (several
minutes), the machine's network starts to respond normally.
I've got no soft lockups logged in /var/log/messages. Nor anything
strange
enough to call my attention.
The problem does not happen with a non-Xen kernel.
The machine firmware (BIOS if you like) is updated to the latest
version.
Disabling all the non-essential hardware (USB, serial/parallel
ports, IDE
ports, powersaving etc) makes no difference.
When not under high disk load the machine seems stable, with
several domU VMs
running happily under it.
--
Daniel Mealha Cabrita
Divisao de Suporte Tecnico
AINFO / Reitoria / UTFPR
http://www.utfpr.edu.br
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