Re: [Xen-users] dom0 freezes under high IO load

[Tim Post <tim.post@xxxxxxxxxxxxxxx>]

On Mon, 2007-03-05 at 08:44 +0100, Ulrich Windl wrote:
> On 4 Mar 2007 at 15:12, bigfoot29 wrote:
> 
> > Heya. :)
> > 
> > Just wanted to second dom0 - crashing behavior.
> > 
> > Due to the fact that I have had never the same problems with 2.0.7 (and
> > at least the same CPU/network utilization -> HDD-utilization should be
> > compareable) I can second that with 3.0.x the behavior of dom0 got bad.
> > 
> > Normal uptime with 2.0.7 was up to 2 months; with 3.0.x its pending from
> > 24 hours up to a week.
> 
> SLES10-x86_64:
> # uptime
>   8:39am  up 97 days 17:02,  1 user,  load average: 1.87, 1.83, 1.76
> 

Same here except Ubuntu LTS

root@horizon2:/proc/xen# uptime
 03:00:01 up 111 days,  5:33,  2 users,  load average: 0.00, 0.00, 0.00

root@horizon2:/proc/xen# pvscan
  PV /dev/sda   VG raid1   lvm2 [1.82 TB / 733.39 GB free]
  Total: 1 [1.82 TB] / in use: 1 [1.82 TB] / in no VG: 0 [0   ]

root@horizon2:/proc/xen#

Everything is LVM backed on a 2TB raid5 array. Supporting 40+
bull-in-china-shop guests for 111 days without issue, all PV.

> Why would you run a samba server in Dom0, and did you install the recent 
> security 
> updates for samba?
> 

Especially dom-0 with no swap :) Running any network FS without swap is
suicide. This is [ I suspect one of many ] of the cause of the "child
illnesses", not Xen.

> Ulrich
> 

Best,
--Tim


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