linux-kernel - Re: [RFC][-mm] Memory controller add mm->owner

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Message-ID: <6599ad830803260821r5c5b56f3pd381659d0866c87b@mail.gmail.com>
Date:	Wed, 26 Mar 2008 08:21:59 -0700
From:	"Paul Menage" <menage@...gle.com>
To:	balbir@...ux.vnet.ibm.com
Cc:	linux-mm@...ck.org, "Hugh Dickins" <hugh@...itas.com>,
	"Sudhir Kumar" <skumar@...ux.vnet.ibm.com>,
	"YAMAMOTO Takashi" <yamamoto@...inux.co.jp>, lizf@...fujitsu.com,
	linux-kernel@...r.kernel.org, taka@...inux.co.jp,
	"David Rientjes" <rientjes@...gle.com>,
	"Pavel Emelianov" <xemul@...nvz.org>,
	"Andrew Morton" <akpm@...ux-foundation.org>,
	"KAMEZAWA Hiroyuki" <kamezawa.hiroyu@...fujitsu.com>
Subject: Re: [RFC][-mm] Memory controller add mm->owner

On Wed, Mar 26, 2008 at 4:41 AM, Balbir Singh <balbir@...ux.vnet.ibm.com> wrote:
>
>  Hmmm.. the 99.9% of the time is just guess work (not measured, could be possibly
>  true). I see and understand your code below. But before I try and implement
>  something like that, I was wondering why zap_threads() does not have that
>  heuristic. That should explain my inhibition.
>
>  Can anyone elaborate on zap_threads further?
>

zap_threads() has to find *all* the other users, whereas in this case
we only have to find one other user.

Paul
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