linux-kernel - Re: [PATCH] mm/mempolicy.c: make sys_mbind & sys_set_mempolicy aware of task_struct->mems

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Message-ID: <20110804220723.GB4388@optiplex.tchesoft.com>
Date:	Thu, 4 Aug 2011 19:07:24 -0300
From:	Rafael Aquini <aquini@...hat.com>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	linux-mm@...ck.org, Andrew Morton <akpm@...ux-foundation.org>,
	KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com>,
	Stephen Wilson <wilsons@...rt.ca>,
	Andrea Arcangeli <aarcange@...hat.com>,
	Christoph Lameter <cl@...ux.com>,
	Rik van Riel <riel@...hat.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] mm/mempolicy.c: make sys_mbind & sys_set_mempolicy aware
 of task_struct->mems_allowed

Howdy folks,

On Wed, Aug 03, 2011 at 06:59:33PM -0700, Andi Kleen wrote:
> Rafael Aquini <aquini@...hat.com> writes:
> 
> > Among several other features enabled when CONFIG_CPUSETS is defined,
> > task_struct is enhanced with the nodemask_t mems_allowed element that
> > serves to register/report on which memory nodes the task may obtain
> > memory. Also, two new lines that reflect the value registered at
> > task_struct->mems_allowed are added to the '/proc/[pid]/status' file:
> 
> As Christoph said this was intentionally designed this way. Originally
> there was some consideration of "relative policies", but that is not
> implemented and had various issues. 
> 
> They're orthogonal mechanisms.

I'd like to thank you all for taking time to look at my proposal, and
providing such a good fix for my misconceptions.

I really appreciate all your feedback.

Cheers!
-- 
Rafael Azenha Aquini <aquini@...hat.com>
Software Maintenance Engineer
Red Hat, Inc.
+55 51 3392.6288 / +55 51 9979.8008
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