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 ` 32-bit dma allocations on 64-bit platforms 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
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=16605.653.502075.164097@napali.hpl.hp.com \
--to=davidm@napali.hpl.hp.com \
--cc=ak@muc.de \
--cc=andrea@suse.de \
--cc=davidm@hpl.hp.com \
--cc=discuss@x86-64.org \
--cc=linux-kernel@vger.kernel.org \
--cc=tiwai@suse.de \
--cc=tripperda@nvidia.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.