linux-kernel - Re: [patch] mm: pageable memory allocator (for DRM-GEM?)

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Message-ID: <48D8ECB3.8070109@linux-foundation.org>
Date:	Tue, 23 Sep 2008 08:18:43 -0500
From:	Christoph Lameter <cl@...ux-foundation.org>
To:	Jerome Glisse <glisse@...edesktop.org>
CC:	Thomas Hellström <thomas@...gstengraphics.com>,
	Nick Piggin <npiggin@...e.de>, keith.packard@...el.com,
	eric@...olt.net, hugh@...itas.com, hch@...radead.org,
	airlied@...ux.ie, jbarnes@...tuousgeek.org,
	dri-devel@...ts.sourceforge.net,
	Linux Memory Management List <linux-mm@...ck.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [patch] mm: pageable memory allocator (for DRM-GEM?)

Jerome Glisse wrote:
> 
> Also what about a uncached page allocator ? As some drivers might need
> them, there is no number but i think their was some concern that changing
> PAT too often might be costly and that we would better have a poll of
> such pages.

IA64 has an uncached allocator. See arch/ia64/include/asm/incached.h and
arch/ia64/kernel/uncached.c. Probably not exactly what you want but its a
starting point.


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