linux-kernel - Re: [LINUX PATCH 2/2] xen/pvhvm: Support more than 32 VCPUs when migrating.

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Message-Id: <201404091015.s39AFQAu022348@aserz7021.oracle.com>
Date:	Wed, 09 Apr 2014 06:15:23 -0400
From:	Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>
To:	Jan Beulich <JBeulich@...e.com>
Cc:	xen-devel@...ts.xenproject.org, konrad@...nel.org,
	david.vrabel@...rix.com, boris.ostrovsky@...cle.com, keir@....org,
	linux-kernel@...r.kernel.org
Subject: Re: [LINUX PATCH 2/2] xen/pvhvm: Support more than 32 VCPUs when
 migrating.


On Apr 9, 2014 4:03 AM, Jan Beulich <JBeulich@...e.com> wrote:
>
> >>> On 08.04.14 at 19:25, <konrad@...nel.org> wrote: 
> > + /* Only Xen 4.5 and higher supports this. */ 
> > + if (HYPERVISOR_vcpu_op(VCPUOP_is_up, smp_processor_id(), NULL) == -ENOSYS) 
> > + vcpuops = false; 
>
> Did you mean to say "for HVM guests" in the comment? And of 
> course the comment could quickly become stale if we backported 
> the Xen side change to e.g. 4.4.1. 
>

Right. But I thought that features like that (new hypercalls) wasn't applicable for backporting?

Thabksy
> Jan 
>