From: Dario Faggioli <dario.faggioli@citrix.com>
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
Subject: Re: [PATCH v6 4/8] mm: Scrub memory from idle loop
Date: Mon, 7 Aug 2017 16:05:16 +0200 [thread overview]
Message-ID: <1502114716.18446.0.camel@citrix.com> (raw)
In-Reply-To: <1501866346-9774-5-git-send-email-boris.ostrovsky@oracle.com>
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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@oracle.com>
>
Reviewed-by: Dario Faggioli <dario.faggioli@citrix.com>
Regards,
Dario
--
<<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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next prev parent reply other threads:[~2017-08-07 14:05 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-08-04 17:05 [PATCH v6 0/8] Memory scrubbing from idle loop Boris Ostrovsky
2017-08-04 17:05 ` [PATCH v6 1/8] mm: Place unscrubbed pages at the end of pagelist Boris Ostrovsky
2017-08-06 17:41 ` Jan Beulich
2017-08-07 14:12 ` Boris Ostrovsky
2017-08-07 14:37 ` Jan Beulich
2017-08-07 14:55 ` Boris Ostrovsky
2017-08-07 15:28 ` Jan Beulich
2017-08-07 10:45 ` Julien Grall
2017-08-07 14:46 ` Boris Ostrovsky
2017-08-07 15:23 ` Julien Grall
2017-08-07 16:57 ` Boris Ostrovsky
2017-08-07 17:01 ` Julien Grall
2017-08-07 17:20 ` Boris Ostrovsky
2017-08-04 17:05 ` [PATCH v6 2/8] mm: Extract allocation loop from alloc_heap_pages() Boris Ostrovsky
2017-08-06 17:42 ` Jan Beulich
2017-08-04 17:05 ` [PATCH v6 3/8] mm: Scrub pages in alloc_heap_pages() if needed Boris Ostrovsky
2017-08-04 17:05 ` [PATCH v6 4/8] mm: Scrub memory from idle loop Boris Ostrovsky
2017-08-07 7:29 ` Jan Beulich
2017-08-07 14:05 ` Dario Faggioli [this message]
2017-08-04 17:05 ` [PATCH v6 5/8] spinlock: Introduce spin_lock_cb() Boris Ostrovsky
2017-08-07 7:32 ` Jan Beulich
2017-08-04 17:05 ` [PATCH v6 6/8] mm: Keep heap accessible to others while scrubbing Boris Ostrovsky
2017-08-07 7:50 ` Jan Beulich
2017-08-04 17:05 ` [PATCH v6 7/8] mm: Print number of unscrubbed pages in 'H' debug handler Boris Ostrovsky
2017-08-04 17:05 ` [PATCH v6 8/8] mm: Make sure pages are scrubbed Boris Ostrovsky
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