[Xen-devel] Re: Abnormal memory usage of dom0 under Squeeze leading to crash

[Bastian Blank <waldi@xxxxxxxxxx>]

[ Stripped debian-release from the recipients, this list is not for
dicussion ]

On Thu, Feb 03, 2011 at 01:37:16PM +0800, Thomas Goirand wrote:
> We normally run Lenny dom0 with 384 MB of RAM in our production server.

So do I:
| $ sudo xm dmesg | grep Comm
| (XEN) Command line: dom0_mem=384M
| $ sudo xm info
| [...]
| release                : 2.6.32-5-xen-amd64
| [...]
| xen_major              : 4
| xen_minor              : 0
| xen_extra              : .1
| [...]

> But as we did few trials with Squeeze, I had the very bad finding that a
> Squeeze dom0 requires at least 1024 MB of RAM. As soon as I do something
> like "xm mem-set Domain-0 800", my server crashes: OOM starts killing
> processes, starting with sshd, then mdadm and so on, then the server
> reboots by itself. This enormous amount of RAM isn't normal at all, and
> I am wondering what is happening.

Way not enough information. You are actually balooning the dom0 down?

Please provide all informations. xm dmesg, the kernel log, xm info.

> With both of the above, it's going to be easy to reproduce.

Nope. Works fine here.

>                                                             As Squeeze
> is said to be out in 3 days, it would be great to find out what's going
> on and fix asap.

There will be no fix for the initial release.

> Desired=Unknown/Install/Remove/Purge/Hold
> | Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
> |/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
> ||/ Name                                    Version                     
> Description
[...]

This looks more like a workstation then a minimal vm host.

Bastian

-- 
Star Trek Lives!

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