From: Jeff Garzik <jgarzik@pobox.com>
To: Bill Davidsen <davidsen@tmr.com>
Cc: David Mosberger-Tang <David.Mosberger@acm.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] Intel x86-64 support merge
Date: Thu, 19 Feb 2004 23:19:17 -0500 [thread overview]
Message-ID: <40358AC5.90103@pobox.com> (raw)
In-Reply-To: <40353382.8010505@tmr.com>
Bill Davidsen wrote:
> David Mosberger-Tang wrote:
>
>>>>>>> On Thu, 19 Feb 2004 00:40:24 +0100, Arjan van de Ven
>>>>>>> <arjan@fenrus.demon.nl> said:
>>
>>
>>
>> Arjan> On Wed, 2004-02-18 at 23:57, H. Peter Anvin wrote:
>> >> Because they were caught by surprise and just hacked the chips
>> >> they had in the pipeline, presumably.
>>
>> Arjan> fair enough; I hope this means the next generation has this
>> Arjan> wart fixed...
>>
>> I wouldn't hold my breath. My impression was that the Intel chipset
>> folks don't want I/O MMU because (a) Windows doesn't need it and (b)
>> real machines use (close-to-)64-bit-capable hardware.
>
>
> Doesn't need it? Does that mean the Win64 uses bounce buffers for
> everything? Or am I totally misreading this?
Well, for 32-bit PCI hardware on a 64-bit OS, you pretty much have to
bounce, without an IOMMU.
I doubt Win64 bounces for 64-bit PCI hardware, but who knows...
Jeff
next prev parent reply other threads:[~2004-02-20 4:19 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1qK5k-7g2-67@gated-at.bofh.it>
[not found] ` <1qK5k-7g2-69@gated-at.bofh.it>
[not found] ` <1qK5k-7g2-71@gated-at.bofh.it>
[not found] ` <1qK5k-7g2-73@gated-at.bofh.it>
[not found] ` <1qK5k-7g2-65@gated-at.bofh.it>
2004-02-19 22:06 ` [PATCH] Intel x86-64 support merge Bill Davidsen
2004-02-20 4:03 ` David Mosberger-Tang
2004-02-20 4:19 ` Jeff Garzik [this message]
2004-02-20 7:48 ` Jes Sorensen
2004-02-21 2:07 ` David Mosberger
[not found] <1qHr5-2tJ-39@gated-at.bofh.it>
[not found] ` <1qHr5-2tJ-37@gated-at.bofh.it>
[not found] ` <1qIZw-6b9-17@gated-at.bofh.it>
[not found] ` <1qJsI-6Be-57@gated-at.bofh.it>
2004-02-19 0:05 ` David Mosberger-Tang
2004-02-19 9:36 ` David Weinehall
[not found] <200402182006.i1IK6CsS022562@hera.kernel.org>
2004-02-18 21:21 ` Arjan van de Ven
2004-02-18 22:57 ` H. Peter Anvin
2004-02-18 23:16 ` Arjan van de Ven
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=40358AC5.90103@pobox.com \
--to=jgarzik@pobox.com \
--cc=David.Mosberger@acm.org \
--cc=davidsen@tmr.com \
--cc=linux-kernel@vger.kernel.org \
/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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox