From mboxrd@z Thu Jan  1 00:00:00 1970
From: Dario Faggioli <dario.faggioli@citrix.com>
Subject: Re: [PATCH v5 4/8] mm: Scrub memory from idle loop
Date: Fri, 23 Jun 2017 10:36:11 +0200
Message-ID: <1498206971.7405.40.camel@citrix.com>
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To: Boris Ostrovsky <boris.ostrovsky@oracle.com>, xen-devel@lists.xen.org
Cc: sstabellini@kernel.org, wei.liu2@citrix.com, George.Dunlap@eu.citrix.com, andrew.cooper3@citrix.com, ian.jackson@eu.citrix.com, tim@xen.org, jbeulich@suse.com
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On Thu, 2017-06-22 at 14:57 -0400, Boris Ostrovsky wrote:
> Instead of scrubbing pages during guest destruction (from
> free_heap_pages()) do this opportunistically, from the idle loop.
>=20
> We might come to scrub_free_pages()from idle loop while another CPU
> uses mapcache override, resulting in a fault while trying to do=C2=A0
> __map_domain_page() in scrub_one_page(). To avoid this, make mapcache
> vcpu override a per-cpu variable.
>=20
> Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
>
Reviewed-by: Dario Faggioli <dario.faggioli@citrix.com>

Regards,
Dario
--=20
<<This happens because I choose it to happen!>> (Raistlin Majere)
-----------------------------------------------------------------
Dario Faggioli, Ph.D, http://about.me/dario.faggioli
Senior Software Engineer, Citrix Systems R&D Ltd., Cambridge (UK)
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