Re: [Xen-devel] [PATCH v6 4/8] mm: Scrub memory from idle loop

[Dario Faggioli <dario.faggioli@xxxxxxxxxx>]

On Fri, 2017-08-04 at 13:05 -0400, Boris Ostrovsky wrote:
> Instead of scrubbing pages during guest destruction (from
> free_heap_pages()) do this opportunistically, from the idle loop.
> 
> We might come to scrub_free_pages()from idle loop while another CPU
> uses mapcache override, resulting in a fault while trying to do
> __map_domain_page() in scrub_one_page(). To avoid this, make mapcache
> vcpu override a per-cpu variable.
> 
> Signed-off-by: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>
>
Reviewed-by: Dario Faggioli <dario.faggioli@xxxxxxxxxx>

Regards,
Dario
-- 
<<This happens because I choose it to happen!>> (Raistlin Majere)
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Dario Faggioli, Ph.D, http://about.me/dario.faggioli
Senior Software Engineer, Citrix Systems R&D Ltd., Cambridge (UK)

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