[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [Xen-devel] [PATCH v6a 17/17] xen/arm: Restrict saving of gic register for idle domain

Hi Julien,

On Fri, Jun 27, 2014 at 8:28 PM, Julien Grall <julien.grall@xxxxxxxxxx> wrote:
> On 27/06/14 15:45, Ian Campbell wrote:
>> On Thu, 2014-06-26 at 15:33 +0100, Julien Grall wrote:
>>> Hi Vijay,
>>> On 06/26/2014 06:34 AM, vijay.kilari@xxxxxxxxx wrote:
>>>> From: Vijaya Kumar K <Vijaya.Kumar@xxxxxxxxxxxxxxxxxx>
>>>> Check for idle domain is missing before saving gic context
>>> Can you be a bit more verbose to explain why we don't need to save
>>> context for idle vcpu?
>> There's lots of state you don't need to save for an idle domain, this
>> one seems pretty clear cut to me.
> Right. Actually, for a lambda developer it's not clear why we add non-stop
> is_idle_vcpu on every save/restore functions.
> As the Xen will always stay to hyp mode when the idle VCPU is running, why
> do we simply skip ctx_to/ctx_from?
> It would make more sense and we will be able to put a big comment to clearly
> explain how idle VCPU works.

   My knowledge on this topic is limited to explain in detail how idle
VCPU works
in Xen.
> Regards,
> --
> Julien Grall

Xen-devel mailing list



Lists.xenproject.org is hosted with RackSpace, monitoring our
servers 24x7x365 and backed by RackSpace's Fanatical Support®.