From: Gilad Ben-Yossef <gilad@benyossef.com>
To: Christoph Lameter <cl@linux.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@gmail.com>,
linux-kernel@vger.kernel.org,
Thomas Gleixner <tglx@linutronix.de>, Tejun Heo <tj@kernel.org>,
John Stultz <johnstul@us.ibm.com>,
Andrew Morton <akpm@linux-foundation.org>,
KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
Mel Gorman <mel@csn.ul.ie>, Mike Frysinger <vapier@gentoo.org>,
David Rientjes <rientjes@google.com>,
Hugh Dickins <hughd@google.com>,
Minchan Kim <minchan.kim@gmail.com>,
Konstantin Khlebnikov <khlebnikov@openvz.org>,
Chris Metcalf <cmetcalf@tilera.com>,
Hakan Akkan <hakanakkan@gmail.com>,
Max Krasnyansky <maxk@qualcomm.com>,
Frederic Weisbecker <fweisbec@gmail.com>,
linux-mm@kvack.org
Subject: Re: [PATCH v1 5/6] mm: make vmstat_update periodic run conditional
Date: Wed, 9 May 2012 17:26:08 +0300 [thread overview]
Message-ID: <CAOtvUMfGkjTwPX7fk_uBvFyd2EpcoksLJoNET-6Ox6y=JN+LeA@mail.gmail.com> (raw)
In-Reply-To: <alpine.DEB.2.00.1205081033450.27713@router.home>
On Tue, May 8, 2012 at 6:34 PM, Christoph Lameter <cl@linux.com> wrote:
> On Tue, 8 May 2012, Gilad Ben-Yossef wrote:
>
>> > But this would still mean that the vmstat update thread would run on an
>> > arbitrary cpu. If I have a sacrificial lamb processor for OS processing
>> > then I would expect the vmstat update thread to stick to that processor
>> > and avoid to run on the other processor that I would like to be as free
>> > from OS noise as possible.
>> >
>>
>> OK, what about -
>>
>> - We pick a scapegoat cpu (the first to come up gets the job).
>> - We add a knob to let user designate another cpu for the job.
>> - If scapegoat cpus goes offline, the cpu processing the off lining is
>> the new scapegoat.
>>
>> Does this makes better sense?
>
> Sounds good. The first that comes up. If the cpu is isolated then the
> first non isolated cpu is picked.
>
OK, will do.
Thanks,
Gilad
--
Gilad Ben-Yossef
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next prev parent reply other threads:[~2012-05-09 14:26 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-05-03 14:55 [PATCH v1 0/6] reduce workqueue and timer noise Gilad Ben-Yossef
2012-05-03 14:55 ` [PATCH v1 1/6] timer: make __next_timer_interrupt explicit about no future event Gilad Ben-Yossef
2012-05-04 12:04 ` Frederic Weisbecker
2012-05-04 12:20 ` Frederic Weisbecker
2012-05-25 20:48 ` Thomas Gleixner
2012-05-25 20:56 ` Chris Metcalf
2012-05-25 21:04 ` Thomas Gleixner
2012-05-03 14:55 ` [PATCH v1 2/6] workqueue: introduce schedule_on_each_cpu_mask Gilad Ben-Yossef
2012-05-04 4:44 ` Srivatsa S. Bhat
2012-05-03 14:55 ` [PATCH v1 3/6] workqueue: introduce schedule_on_each_cpu_cond Gilad Ben-Yossef
2012-05-03 15:39 ` Tejun Heo
2012-05-06 13:15 ` Gilad Ben-Yossef
2012-05-07 17:17 ` Tejun Heo
2012-05-09 14:26 ` Gilad Ben-Yossef
2012-05-04 4:51 ` Srivatsa S. Bhat
2012-05-06 13:16 ` Gilad Ben-Yossef
2012-05-03 14:56 ` [PATCH v1 4/6] mm: make lru_drain selective where it schedules work Gilad Ben-Yossef
2012-05-03 14:56 ` [PATCH v1 5/6] mm: make vmstat_update periodic run conditional Gilad Ben-Yossef
2012-05-07 15:29 ` Christoph Lameter
2012-05-07 19:33 ` KOSAKI Motohiro
2012-05-07 19:40 ` Christoph Lameter
2012-05-08 15:25 ` Gilad Ben-Yossef
2012-05-08 15:34 ` Christoph Lameter
2012-05-09 14:26 ` Gilad Ben-Yossef [this message]
2012-05-08 15:22 ` Gilad Ben-Yossef
2012-05-08 15:18 ` Gilad Ben-Yossef
2012-05-08 15:24 ` Christoph Lameter
2012-05-03 14:56 ` [PATCH v1 6/6] x86: make clocksource watchdog configurable (not for mainline) Gilad Ben-Yossef
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