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Re: [Xen-devel] Re: [Pkg-xen-devel] Abnormal memory usage of dom0 under

To: Ian Campbell <Ian.Campbell@xxxxxxxxxx>
Subject: Re: [Xen-devel] Re: [Pkg-xen-devel] Abnormal memory usage of dom0 under Squeeze leading to crash
From: chris <tknchris@xxxxxxxxx>
Date: Fri, 4 Mar 2011 20:58:42 -0500
Cc: Debian Xen Team <pkg-xen-devel@xxxxxxxxxxxxxxxxxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>, Thomas Goirand <thomas@xxxxxxxxxx>
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On Thu, Feb 3, 2011 at 4:35 AM, Ian Campbell <Ian.Campbell@xxxxxxxxxx> wrote:
> On Thu, 2011-02-03 at 09:28 +0000, Thomas Goirand wrote:
>> On 02/03/2011 04:34 PM, Bastian Blank wrote:
>> > Way not enough information. You are actually balooning the dom0
>> down?
>> using "xm mem-set Domain-0 800" yes...
> >From what initial size?
> Does using dom0_mem=800M have the same issue?
>> > Please provide all informations. xm dmesg, the kernel log, xm info.
>> How, if the server reboots when I do it?
> In that case please can you setup a serial console.
> Ian.
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I would like to just second this. I have 3 hosts running squeeze and
am running into that issue as well. It seems after i start enough
guests to leave dom0 with less than 1gb i get OOM going crazy killing
xend and very shortly after a crash of dom0 which leads to reboot.
Prior to Xen4 I had similarly bad experiences with memory ballooning,
most with regard to any attempt to balloon down. I figured I'd give it
a go on 4 and it seems I will be going back to limiting dom0's ram
from the cmdline.

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