linux-kernel - Re: [PATCH 17/18] sched: Retry migration of tasks to CPU on a preferred node

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20130731100728.GP2296@suse.de>
Date:	Wed, 31 Jul 2013 11:07:28 +0100
From:	Mel Gorman <mgorman@...e.de>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	Srikar Dronamraju <srikar@...ux.vnet.ibm.com>,
	Ingo Molnar <mingo@...nel.org>,
	Andrea Arcangeli <aarcange@...hat.com>,
	Johannes Weiner <hannes@...xchg.org>,
	Linux-MM <linux-mm@...ck.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 17/18] sched: Retry migration of tasks to CPU on a
 preferred node

On Wed, Jul 31, 2013 at 12:05:05PM +0200, Peter Zijlstra wrote:
> On Wed, Jul 31, 2013 at 11:03:31AM +0100, Mel Gorman wrote:
> > On Thu, Jul 25, 2013 at 12:33:52PM +0200, Peter Zijlstra wrote:
> > > 
> > > Subject: stop_machine: Introduce stop_two_cpus()
> > > From: Peter Zijlstra <peterz@...radead.org>
> > > Date: Sun Jul 21 12:24:09 CEST 2013
> > > 
> > > Introduce stop_two_cpus() in order to allow controlled swapping of two
> > > tasks. It repurposes the stop_machine() state machine but only stops
> > > the two cpus which we can do with on-stack structures and avoid
> > > machine wide synchronization issues.
> > > 
> > > Signed-off-by: Peter Zijlstra <peterz@...radead.org>
> > 
> > Clever! I did not spot any problems so will be pulling this (and
> > presumably the next patch) into the series. Thanks!
> 
> You mean aside from the glaring lack of hotplug handling? :-)

Other than that which the following patch called out anyway :)

-- 
Mel Gorman
SUSE Labs
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/