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Re: [Xen-devel] RE: [Xen-users] Xen in a 32 way system

To: "Petersson, Mats" <Mats.Petersson@xxxxxxx>
Subject: Re: [Xen-devel] RE: [Xen-users] Xen in a 32 way system
From: "Pablo Montesinos" <pablomontesinos@xxxxxxxxx>
Date: Thu, 1 Jun 2006 13:38:57 -0700
Cc: xen-devel@xxxxxxxxxxxxxxxxxxx, "Puthiyaparambil, Aravindh" <aravindh.puthiyaparambil@xxxxxxxxxx>, Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>, Ryan Harper <ryanh@xxxxxxxxxx>, Uros Trebec <uros.trebec@xxxxxxxxx>, xen-users@xxxxxxxxxxxxxxxxxxx
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hat tip for you... It is booting, I am still not able to run xend with
more than 4 procs, but that's a complete different story.
Ryan: did you do anything special to load configure xend? it just
hangs as soon as I enable more than 1 chassis

Thank you very much to all of you guys!
Pablo

On 6/1/06, Petersson, Mats <Mats.Petersson@xxxxxxx> wrote:
> -----Original Message-----
> From: Keir Fraser [mailto:Keir.Fraser@xxxxxxxxxxxx]
> Sent: 01 June 2006 19:09
> To: Petersson, Mats
> Cc: xen-devel@xxxxxxxxxxxxxxxxxxx; Puthiyaparambil, Aravindh;
> Uros Trebec; Ryan Harper; xen-users@xxxxxxxxxxxxxxxxxxx;
> Pablo Montesinos
> Subject: Re: [Xen-devel] RE: [Xen-users] Xen in a 32 way system
>
>
> On 1 Jun 2006, at 18:59, Petersson, Mats wrote:
>
> > Isn't it a bug that we don't check for -EINVAL in the line here:
> >         for (i = 0; i < NR_CPUS; i++) {
> >                 rc = HYPERVISOR_vcpu_op(VCPUOP_is_up, i, NULL);
> >                 if (rc == -ENOENT)
> >                         break;
> >                 cpu_set(i, cpu_possible_map);
> >         }
> >
> > If NR_CPUS in Linux is bigger than 32, then rc = -EINVAL,
> not -ENOENT
> > when it returns from the vcpu_op, because the first check
> is to see if
> > vcpuid is >=32...
> >
> > Checking if (rc < 0) would be better, I should think...
>
> Yes, the current code is rather mad. I'll fix it.

Of course, if NR_CPUS is 32, it shouldn't matter...

Pablo, can you check the CONFIG_NR_CPUS in your .config for your
linux-2.6.16.13-xen? As in my system, NR_CPUS = 32..

--
Mats
>
>   -- Keir
>
>
>



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