From: David Mosberger <davidm@napali.hpl.hp.com>
To: Andi Kleen <ak@muc.de>
Cc: Terence Ripperda <tripperda@nvidia.com>,
discuss@x86-64.org, tiwai@suse.de, linux-kernel@vger.kernel.org,
andrea@suse.de
Subject: Re: 32-bit dma allocations on 64-bit platforms
Date: Fri, 25 Jun 2004 21:58:53 -0700 [thread overview]
Message-ID: <16605.653.502075.164097@napali.hpl.hp.com> (raw)
In-Reply-To: <20040624185156.GA19559@colin2.muc.de>
>>>>> On Thu, 24 Jun 2004 20:51:56 +0200, Andi Kleen <ak@muc.de> said:
Andi> A better IO_TLB_SHIFT would be 16 or 17.
Careful. I see code like this:
stride = (1 << (PAGE_SHIFT - IO_TLB_SHIFT));
You probably don't want IO_TLB_SHIFT > PAGE_SHIFT... Increasing
io_tlb_nslabs should be no problem though (subject to memory
availability). It can already by set via the "swiotlb" option.
I doubt swiotlb is the right thing here, though, given the bw-demands
of graphics. Too bad Nvidia cards don't support > 32 bit
addressability and Intel chipsets don't support I/O MMUs...
--david
next prev parent reply other threads:[~2004-06-26 4:59 UTC|newest]
Thread overview: 70+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <m3acyu6pwd.fsf@averell.firstfloor.org>
[not found] ` <20040623213643.GB32456@hygelac>
2004-06-23 23:46 ` Andi Kleen
2004-06-24 11:13 ` Takashi Iwai
2004-06-24 11:29 ` [discuss] " Andi Kleen
2004-06-24 14:36 ` Takashi Iwai
2004-06-24 14:42 ` Andi Kleen
2004-06-24 14:58 ` Takashi Iwai
2004-06-24 15:29 ` Andrea Arcangeli
2004-06-24 15:48 ` Nick Piggin
2004-06-24 16:52 ` Andrea Arcangeli
2004-06-24 16:56 ` William Lee Irwin III
2004-06-24 17:32 ` Andrea Arcangeli
2004-06-24 17:38 ` William Lee Irwin III
2004-06-24 18:02 ` Andrea Arcangeli
2004-06-24 18:13 ` William Lee Irwin III
2004-06-24 18:27 ` Andrea Arcangeli
2004-06-24 18:50 ` William Lee Irwin III
2004-06-24 21:54 ` Andrew Morton
2004-06-24 22:08 ` William Lee Irwin III
2004-06-24 22:45 ` Andrea Arcangeli
2004-06-24 22:51 ` William Lee Irwin III
2004-06-24 23:09 ` Andrew Morton
2004-06-24 23:15 ` William Lee Irwin III
2004-06-25 6:16 ` William Lee Irwin III
2004-06-25 2:39 ` Andrea Arcangeli
2004-06-25 2:47 ` Andrew Morton
2004-06-25 3:19 ` Andrea Arcangeli
2004-06-24 22:11 ` Andrew Morton
2004-06-24 23:09 ` Andrea Arcangeli
2004-06-25 1:17 ` Nick Piggin
2004-06-25 3:11 ` Andrea Arcangeli
2004-06-24 22:21 ` Andrea Arcangeli
2004-06-24 22:36 ` Andrew Morton
2004-06-24 23:15 ` Andrea Arcangeli
2004-06-24 22:37 ` William Lee Irwin III
2004-06-24 22:40 ` William Lee Irwin III
2004-06-24 23:21 ` Andrea Arcangeli
2004-06-24 23:45 ` William Lee Irwin III
2004-06-24 17:39 ` Andrea Arcangeli
2004-06-24 17:53 ` William Lee Irwin III
2004-06-24 18:07 ` Andrea Arcangeli
2004-06-24 18:29 ` William Lee Irwin III
2004-06-24 16:04 ` Takashi Iwai
2004-06-24 17:16 ` Andrea Arcangeli
2004-06-24 18:33 ` Takashi Iwai
2004-06-24 18:44 ` Andrea Arcangeli
2004-06-25 15:50 ` Takashi Iwai
2004-06-25 17:30 ` Andrea Arcangeli
2004-06-25 17:39 ` Takashi Iwai
2004-06-25 17:45 ` Andrea Arcangeli
2004-06-24 14:45 ` Terence Ripperda
2004-06-24 15:41 ` Andrea Arcangeli
2004-06-24 15:44 ` Terence Ripperda
2004-06-24 16:15 ` [discuss] " Andi Kleen
2004-06-24 17:22 ` Andrea Arcangeli
2004-06-24 22:28 ` Terence Ripperda
2004-06-24 18:51 ` Andi Kleen
2004-06-26 4:58 ` David Mosberger [this message]
[not found] <2akPm-16l-65@gated-at.bofh.it>
2004-06-23 21:46 ` Andi Kleen
2004-06-24 6:18 ` Arjan van de Ven
2004-06-24 10:33 ` Andi Kleen
2004-06-24 13:48 ` Jesse Barnes
2004-06-24 14:39 ` Terence Ripperda
2004-06-23 18:35 Terence Ripperda
2004-06-23 19:19 ` Jeff Garzik
2004-06-26 5:05 ` David Mosberger
2004-06-26 7:16 ` Arjan van de Ven
2004-06-29 6:13 ` David Mosberger
2004-06-29 6:55 ` Arjan van de Ven
2004-06-30 8:00 ` Jes Sorensen
2004-06-26 5:02 ` David Mosberger
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