linux-kernel - Re: your mail

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Message-ID: <0000013a2cff3c3d-76e00716-2869-4dc8-8717-82f0136018d0-000000@email.amazonses.com>
Date:	Thu, 4 Oct 2012 18:17:37 +0000
From:	Christoph Lameter <cl@...ux.com>
To:	Andrea Arcangeli <aarcange@...hat.com>
cc:	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Peter Zijlstra <pzijlstr@...hat.com>,
	Ingo Molnar <mingo@...e.hu>, Mel Gorman <mel@....ul.ie>,
	Hugh Dickins <hughd@...gle.com>,
	Rik van Riel <riel@...hat.com>,
	Johannes Weiner <hannes@...xchg.org>,
	Hillf Danton <dhillf@...il.com>,
	Andrew Jones <drjones@...hat.com>,
	Dan Smith <danms@...ibm.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Paul Turner <pjt@...gle.com>,
	Suresh Siddha <suresh.b.siddha@...el.com>,
	Mike Galbraith <efault@....de>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
Subject: Re: your mail

On Thu, 4 Oct 2012, Andrea Arcangeli wrote:

> So we could drop page_autonuma by creating a CONFIG_SLUB=y dependency
> (AUTONUMA wouldn't be available in the kernel config if SLAB=y, and it
> also wouldn't be available on 32bit archs but the latter isn't a
> problem).

Nope it should depend on page struct alignment. Other kernel subsystems
may be depeding on page struct alignment in the future (and some other
arches may already have that requirement)

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