Xen project Mailing List

RE: [Xen-devel] High-load Domain0 cause guest domian panic.

To: "Keir Fraser" <Keir.Fraser@xxxxxxxxxxxx>, "Hidetoshi Nishi" <nishi.hidetoshi@xxxxxxxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxx>

From: "Graham, Simon" <Simon.Graham@xxxxxxxxxxx>

Date: Wed, 18 Apr 2007 10:37:58 -0400

Delivery-date: Wed, 18 Apr 2007 07:36:48 -0700

List-id: Xen developer discussion <xen-devel.lists.xensource.com>

Thread-index: AceBq0ow0uhXXxXMRb+AJWGRad9pLQACjlBYAAFMx4sAAu8PdA==

Thread-topic: [Xen-devel] High-load Domain0 cause guest domian panic.

Unfortunately, the time required seems to be very variable and (Dom0) load dependant.

When I saw this, the problem was that vif & vbd hot plug in Dom0 were serialized and sometimes vif hot-plug was taking a really long time; I wonder if we need to find a way to not start the timeout for a device until hot plug actually starts in dom0?

Simon

From: Keir Fraser [mailto:Keir.Fraser@xxxxxxxxxxxx]
Sent: Wed 18/04/2007 9:08 AM
To: Graham, Simon; Hidetoshi Nishi; xen-devel@xxxxxxxxxxxxxxxxxxx
Subject: Re: [Xen-devel] High-load Domain0 cause guest domian panic.

The domU kernel will already wait for all devices it discovers to enter connected state. If that timeout’s not long enough we could make it longer, or configurable on the domU command line.

-- Keir

On 18/4/07 13:31, "Graham, Simon" <Simon.Graham@xxxxxxxxxxx> wrote:

See http://lists.xensource.com/archives/html/xen-devel/2006-12/msg00136.html for some discussion on this - no resolution though.

Simon

From: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx on behalf of Hidetoshi Nishi
Sent: Tue 17/04/2007 8:53 AM
To: xen-devel@xxxxxxxxxxxxxxxxxxx
Subject: [Xen-devel] High-load Domain0 cause guest domian panic.

Hi all.

Currently we are investigating guest domain panic.

When guest domain whose root disk is VBD is created,
domain0 with high-load gets late to initiate the
back-end driver. And guest domain can not mount
his root file system and goes into panic.

We think domain initial sequence have to wait to be ready
of special device(root disk, etc).
And we should be able to specify special device in config file.

Do you have any idea ?

Thank you. Nishi

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