linux-kernel - Re: [patch 03/11] mm, mempolicy: remove per-process flag

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Message-ID: <877g866i3c.fsf@tassilo.jf.intel.com>
Date:	Fri, 07 Mar 2014 09:20:39 -0800
From:	Andi Kleen <andi@...stfloor.org>
To:	David Rientjes <rientjes@...gle.com>
Cc:	Andrew Morton <akpm@...ux-foundation.org>,
	Johannes Weiner <hannes@...xchg.org>,
	Michal Hocko <mhocko@...e.cz>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>,
	Christoph Lameter <cl@...ux-foundation.org>,
	Pekka Enberg <penberg@...nel.org>, Tejun Heo <tj@...nel.org>,
	Mel Gorman <mgorman@...e.de>, Oleg Nesterov <oleg@...hat.com>,
	Rik van Riel <riel@...hat.com>,
	Jianguo Wu <wujianguo@...wei.com>,
	Tim Hockin <thockin@...gle.com>, linux-kernel@...r.kernel.org,
	linux-mm@...ck.org, cgroups@...r.kernel.org,
	linux-doc@...r.kernel.org
Subject: Re: [patch 03/11] mm, mempolicy: remove per-process flag

David Rientjes <rientjes@...gle.com> writes:
>
> Per-process flags are a scarce resource so we should free them up
> whenever possible and make them available.  We'll be using it shortly for
> memcg oom reserves.

I'm not convinced TCP_RR is a meaningfull benchmark for slab.

The shortness seems like an artificial problem.

Just add another flag word to the task_struct? That would seem 
to be the obvious way. People will need it sooner or later anyways.

-Andi

-- 
ak@...ux.intel.com -- Speaking for myself only
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