From: Jesse Barnes <jesse.barnes@intel.com>
To: Christoph Lameter <clameter@sgi.com>
Cc: Martin Bligh <mbligh@mbligh.org>, Andrew Morton <akpm@osdl.org>,
linux-kernel@vger.kernel.org, Rohit Seth <rohitseth@google.com>
Subject: Re: ZONE_DMA
Date: Fri, 22 Sep 2006 12:06:57 -0700 [thread overview]
Message-ID: <200609221206.57701.jesse.barnes@intel.com> (raw)
In-Reply-To: <Pine.LNX.4.64.0609221139570.8356@schroedinger.engr.sgi.com>
On Friday, September 22, 2006 11:40 am, Christoph Lameter wrote:
> On Fri, 22 Sep 2006, Jesse Barnes wrote:
> > Right, the internals are arch specific and don't necessarily have to
> > rely on a zone, depending on their DMA constraints.
>
> From what I can see the arch specific do some tricks and then pick
> GFP_DMA or something to get memory that is appropriately limited. Having
> the ability to retrieve pages from a certain range from the page
> allocator would fix this issue and improve the ability of devices to
> allocate memory.
Right, being able to allocate from specific ranges would obviate the need
for GFP_DMA and the various zones. It would come with a cost though since
the VM would have to become aware of pressure at various ranges rather
than just on zones like we have now. I think that's where things get
tricky.
Jesse
next prev parent reply other threads:[~2006-09-22 19:06 UTC|newest]
Thread overview: 128+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-09-20 20:54 2.6.19 -mm merge plans Andrew Morton
2006-09-20 21:08 ` Jeff Garzik
2006-09-20 21:42 ` Badari Pulavarty
2006-09-20 21:53 ` USB: fix autosuspend-autoresume with CONFIGRe: " Jiri Kosina
2006-09-20 22:09 ` Andrew Morton
2006-09-20 22:41 ` Greg KH
2006-09-20 21:55 ` Autofs4 breakage (was 2.6.19 -mm merge plans) Trond Myklebust
2006-09-20 22:13 ` Andrew Morton
2006-09-21 3:39 ` Andrew Morton
2006-09-21 23:25 ` Trond Myklebust
2006-09-22 15:55 ` Andrew Morton
2006-09-26 4:10 ` Ian Kent
2006-09-21 0:09 ` 2.6.19 -mm merge plans Martin J. Bligh
2006-09-21 0:22 ` ZONE_DMA (was: Re: 2.6.19 -mm merge plans) Andrew Morton
2006-09-21 0:31 ` Christoph Lameter
2006-09-21 1:03 ` Alan Cox
2006-09-21 15:59 ` James Bottomley
2006-09-21 0:50 ` ZONE_DMA Martin J. Bligh
2006-09-21 1:10 ` ZONE_DMA Christoph Lameter
2006-09-21 1:23 ` ZONE_DMA Martin J. Bligh
2006-09-21 15:58 ` ZONE_DMA Christoph Lameter
2006-09-21 16:57 ` ZONE_DMA Martin Bligh
2006-09-21 17:54 ` ZONE_DMA Christoph Lameter
2006-09-21 23:15 ` ZONE_DMA Martin Bligh
2006-09-22 2:59 ` ZONE_DMA Christoph Lameter
2006-09-22 17:21 ` ZONE_DMA Jesse Barnes
2006-09-22 17:39 ` ZONE_DMA Jesse Barnes
2006-09-22 18:08 ` ZONE_DMA Christoph Lameter
2006-09-22 18:26 ` ZONE_DMA Jesse Barnes
2006-09-22 18:32 ` ZONE_DMA Christoph Lameter
2006-09-22 18:39 ` ZONE_DMA Jesse Barnes
2006-09-22 18:40 ` ZONE_DMA Christoph Lameter
2006-09-22 19:06 ` Jesse Barnes [this message]
2006-09-22 19:07 ` ZONE_DMA Christoph Lameter
2006-09-22 17:35 ` ZONE_DMA Martin Bligh
2006-09-22 17:37 ` ZONE_DMA Christoph Lameter
2006-09-21 0:40 ` 2.6.19 -mm merge plans Christoph Lameter
2006-09-21 2:28 ` 2.6.19 -mm merge plans (NTP changes) john stultz
2006-09-21 2:40 ` Andrew Morton
2006-09-21 10:24 ` Roman Zippel
2006-09-25 16:50 ` john stultz
2006-09-25 17:04 ` Ray Lee
2006-09-25 17:38 ` Roman Zippel
2006-09-21 4:22 ` 2.6.19 -mm merge plans Jeff Garzik
2006-09-21 5:07 ` Andrew Morton
2006-09-21 5:23 ` Linus Torvalds
2006-09-21 9:12 ` Alan Cox
2006-09-21 6:36 ` Jeff Garzik
2006-09-21 6:48 ` Andrew Morton
2006-09-21 11:10 ` Rafael J. Wysocki
2006-09-22 13:16 ` release cycle (Re: 2.6.19 -mm merge plans) Pavel Machek
2006-09-21 9:16 ` 2.6.19 -mm merge plans Alan Cox
2006-09-21 10:55 ` Jan Engelhardt
2006-09-21 15:25 ` Linus Torvalds
2006-09-21 15:50 ` Jan Engelhardt
2006-09-21 17:59 ` Andrew Morton
2006-09-21 18:20 ` Jeff Garzik
2006-09-21 18:22 ` Linus Torvalds
2006-09-21 18:33 ` Jeff Garzik
2006-09-21 18:55 ` Andrew Morton
2006-09-21 19:46 ` Adrian Bunk
2006-09-21 20:37 ` Diego Calleja
2006-09-21 21:35 ` Randy.Dunlap
2006-09-21 20:38 ` Jeff Garzik
2006-09-21 20:49 ` Adrian Bunk
2006-09-21 21:33 ` Bill Davidsen
2006-09-21 21:33 ` Jeff Garzik
2006-09-21 21:52 ` David Miller
2006-09-21 22:05 ` Dave Jones
2006-09-21 22:44 ` David Miller
2006-09-22 8:35 ` Russell King
2006-09-22 15:48 ` Dave Jones
2006-09-22 16:21 ` Linus Torvalds
2006-09-22 20:08 ` Roland Dreier
2006-09-22 20:22 ` Jeff Garzik
2006-09-23 8:29 ` Ryan Anderson
2006-09-24 7:48 ` Lennert Buytenhek
2006-09-24 9:20 ` Russell King
2006-09-24 19:38 ` Mike Galbraith
[not found] ` <20060924142353.6c725128.seanlkml@sympatico.ca>
2006-09-24 18:23 ` Sean
2006-09-24 22:34 ` Stefan Richter
[not found] ` <20060924190758.132c0008.seanlkml@sympatico.ca>
2006-09-24 23:07 ` Sean
2006-09-24 23:09 ` Russell King
[not found] ` <20060924192308.ef60880a.seanlkml@sympatico.ca>
2006-09-24 23:23 ` Sean
2006-09-25 0:48 ` Linus Torvalds
2006-10-11 14:09 ` Pierre Ossman
2006-09-22 16:24 ` Alan Cox
2006-09-22 16:08 ` Dave Jones
2006-09-22 16:29 ` Jeff Garzik
2006-09-22 17:09 ` Dave Jones
2006-09-22 17:11 ` Dave Jones
2006-09-22 18:26 ` Jeff Garzik
2006-09-22 18:26 ` Andrew Morton
2006-09-24 6:33 ` Lennert Buytenhek
2006-09-22 1:03 ` Bill Davidsen
2006-09-24 18:51 ` Ingo Molnar
2006-09-25 3:07 ` Nick Piggin
2006-09-25 11:53 ` Ingo Molnar
2006-09-25 18:57 ` Rafael J. Wysocki
2006-09-22 6:33 ` Andi Kleen
2006-09-23 8:06 ` Andrew Morton
2006-09-23 9:52 ` David Woodhouse
2006-09-21 13:14 ` Ingo Molnar
2006-09-21 17:35 ` Andrew Morton
2006-09-22 13:06 ` Pavel Machek
2006-09-22 19:01 ` Ingo Molnar
2006-09-22 20:29 ` hires timer patchset [was Re: 2.6.19 -mm merge plans] Bill Rugolsky Jr.
2006-09-23 11:07 ` 2.6.19 -mm merge plans Pavel Machek
2006-09-22 20:12 ` Dave Jones
2006-09-21 14:04 ` Apple Motion Sensor (was: 2.6.19 -mm merge plans) Michael Hanselmann
[not found] ` <20060921234637.GA9742@mail.ustc.edu.cn>
2006-09-21 23:46 ` 2.6.19 -mm merge plans Fengguang Wu
2006-09-21 23:59 ` Andrew Morton
[not found] ` <20060922003223.GA9952@mail.ustc.edu.cn>
2006-09-22 0:32 ` Fengguang Wu
2006-09-23 14:48 ` Gene Heskett
[not found] ` <20060924024239.GA11671@mail.ustc.edu.cn>
2006-09-24 2:42 ` Fengguang Wu
2006-09-24 14:25 ` Diego Calleja
2006-09-22 9:24 ` David Woodhouse
2006-09-22 10:10 ` David Woodhouse
2006-09-22 10:42 ` Jan Engelhardt
2006-09-22 11:20 ` David Woodhouse
2006-09-22 14:48 ` Randy.Dunlap
2006-09-23 10:44 ` David Woodhouse
2006-09-22 12:32 ` 2.6.19 -mm merge plans: AVR32 Haavard Skinnemoen
2006-09-22 14:42 ` 2.6.19 -mm merge plans Christoph Hellwig
2006-09-22 16:03 ` 2.6.19 -mm merge plans (ecryptfs) Andrew Morton
2006-09-22 16:53 ` Michael Halcrow
2006-09-25 14:59 ` [PATCH -mm updated] PCMCIA: Add few IDs into ide-cs Marcin Juszkiewicz
2006-09-25 15:48 ` Alan Cox
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