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 v5 4/8] mm: Scrub memory from idle loop
Date: Fri, 23 Jun 2017 10:36:11 +0200 [thread overview]
Message-ID: <1498206971.7405.40.camel@citrix.com> (raw)
In-Reply-To: <1498157830-21845-5-git-send-email-boris.ostrovsky@oracle.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.
>
> 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:[~2017-06-23 8:36 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-06-22 18:57 [PATCH v5 0/8] Memory scrubbing from idle loop Boris Ostrovsky
2017-06-22 18:57 ` [PATCH v5 1/8] mm: Place unscrubbed pages at the end of pagelist Boris Ostrovsky
2017-06-27 17:06 ` Jan Beulich
2017-07-23 2:00 ` Boris Ostrovsky
2017-07-31 14:45 ` Jan Beulich
2017-07-31 16:03 ` Boris Ostrovsky
2017-08-02 9:24 ` Jan Beulich
2017-08-02 15:31 ` Boris Ostrovsky
2017-06-22 18:57 ` [PATCH v5 2/8] mm: Extract allocation loop from alloc_heap_pages() Boris Ostrovsky
2017-06-27 17:59 ` Jan Beulich
2017-06-22 18:57 ` [PATCH v5 3/8] mm: Scrub pages in alloc_heap_pages() if needed Boris Ostrovsky
2017-06-27 18:00 ` Jan Beulich
2017-07-23 2:07 ` Boris Ostrovsky
2017-07-31 15:16 ` Jan Beulich
2017-07-31 16:07 ` Boris Ostrovsky
2017-06-22 18:57 ` [PATCH v5 4/8] mm: Scrub memory from idle loop Boris Ostrovsky
2017-06-23 8:36 ` Dario Faggioli [this message]
2017-06-27 18:01 ` Jan Beulich
2017-07-23 2:14 ` Boris Ostrovsky
2017-07-31 15:20 ` Jan Beulich
2017-07-31 16:15 ` Boris Ostrovsky
2017-08-02 9:27 ` Jan Beulich
2017-06-22 18:57 ` [PATCH v5 5/8] spinlock: Introduce spin_lock_cb() Boris Ostrovsky
2017-06-22 18:57 ` [PATCH v5 6/8] mm: Keep heap accessible to others while scrubbing Boris Ostrovsky
2017-06-27 19:28 ` Jan Beulich
2017-06-27 19:31 ` Jan Beulich
2017-07-23 2:28 ` Boris Ostrovsky
2017-08-02 8:34 ` Jan Beulich
2017-06-22 18:57 ` [PATCH v5 7/8] mm: Print number of unscrubbed pages in 'H' debug handler Boris Ostrovsky
2017-06-22 18:57 ` [PATCH v5 8/8] mm: Make sure pages are scrubbed Boris Ostrovsky
2017-06-27 19:29 ` Jan Beulich
2017-06-23 9:36 ` [PATCH v5 0/8] Memory scrubbing from idle loop Jan Beulich
2017-06-23 13:11 ` Boris Ostrovsky
2017-06-23 13:22 ` Jan Beulich
2017-06-23 13:29 ` Boris Ostrovsky
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