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Re: [Xen-devel] dom0 hang

To: "mukesh.rathor@xxxxxxxxxx" <mukesh.rathor@xxxxxxxxxx>
Subject: Re: [Xen-devel] dom0 hang
From: Keir Fraser <keir.fraser@xxxxxxxxxxxxx>
Date: Thu, 02 Jul 2009 08:18:43 +0100
Cc: Dan Magenheimer <dan.magenheimer@xxxxxxxxxx>, xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>, andrew thomas <andrew.thomas@xxxxxxxxxx>, George Dunlap <George.Dunlap@xxxxxxxxxxxxx>, "Kurt C. Hackel" <kurt.hackel@xxxxxxxxxx>, "ackaouy@xxxxxxxxx" <ackaouy@xxxxxxxxx>
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On 02/07/2009 04:19, "Mukesh Rathor" <mukesh.rathor@xxxxxxxxxx> wrote:

>      Looks like c/s 19500 changed csched_schedule():
> +    ret.time = (is_idle_vcpu(snext->vcpu) ?
> +                -1 : MILLISECS(CSCHED_MSECS_PER_TSLICE));
>    The quickest fix for us would be to just back that out.

The wakeup should come via __runq_tickle(), I think. Anyhow I don't see this
can be the main underlying bug. What if you were running on a uniprocessor
system - you'd still be boned then, right?

I've added George Dunlap to the Cc list by the way. He's doing a bunch of
scheduler work at the moment.

 -- Keir

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