Re: Null scheduler and vwfi native problem

[Dario Faggioli <dfaggioli@xxxxxxxx>]

On Tue, 2021-02-02 at 07:59 +0000, Julien Grall wrote:
> Hi Dario,
> 
Hi!

> I have had a quick look at your place. The RCU call in 
> leave_hypervisor_to_guest() needs to be placed just after the last
> call 
> to check_for_pcpu_work().
> 
> Otherwise, you may be preempted and keep the RCU quiet.
> 
Ok, makes sense. I'll move it.

> The placement in enter_hypervisor_from_guest() doesn't matter too
> much, 
> although I would consider to call it as a late as possible.
> 
Mmmm... Can I ask why? In fact, I would have said "as soon as
possible".

Thanks and Regards
-- 
Dario Faggioli, Ph.D
http://about.me/dario.faggioli
Virtualization Software Engineer
SUSE Labs, SUSE https://www.suse.com/
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