linux-kernel - Re: [PATCH 13/35] autonuma: add page structure fields

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Message-ID: <1338310613.26856.139.camel@twins>
Date:	Tue, 29 May 2012 18:56:53 +0200
From:	Peter Zijlstra <a.p.zijlstra@...llo.nl>
To:	Rik van Riel <riel@...hat.com>
Cc:	Andrea Arcangeli <aarcange@...hat.com>,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	Hillf Danton <dhillf@...il.com>, Dan Smith <danms@...ibm.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...e.hu>, Paul Turner <pjt@...gle.com>,
	Suresh Siddha <suresh.b.siddha@...el.com>,
	Mike Galbraith <efault@....de>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Lai Jiangshan <laijs@...fujitsu.com>,
	Bharata B Rao <bharata.rao@...il.com>,
	Lee Schermerhorn <Lee.Schermerhorn@...com>,
	Johannes Weiner <hannes@...xchg.org>,
	Srivatsa Vaddagiri <vatsa@...ux.vnet.ibm.com>,
	Christoph Lameter <cl@...ux.com>
Subject: Re: [PATCH 13/35] autonuma: add page structure fields

On Tue, 2012-05-29 at 12:46 -0400, Rik van Riel wrote:
> > I don't think it's too great, memcg uses for half of that and yet
> > nobody is booting with cgroup_disable=memory even on not-NUMA servers
> > with less RAM.

Right, it was such a hit we had to disable that by default on RHEL6.

> Not any more. 

Right, hnaz did great work there, but wasn't there still some few pieces
of the shadow page frame left? ISTR LSF/MM talk of moving the last few
bits into the regular page frame, taking the word that became available
through: fc9bb8c768 ("mm: Rearrange struct page").


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