From: Andi Kleen <andi@firstfloor.org>
To: Jesse Barnes <jesse.barnes@intel.com>
Cc: Howard Chu <hyc@symas.com>, linux-kernel <linux-kernel@vger.kernel.org>
Subject: Re: MTRR initialization
Date: 20 Sep 2007 08:50:23 +0200 [thread overview]
Message-ID: <p73d4wdal00.fsf@bingen.suse.de> (raw)
In-Reply-To: <200709191452.57505.jesse.barnes@intel.com>
Jesse Barnes <jesse.barnes@intel.com> writes:
>
> To do this in a nicer way (and be less vulnerable to similar BIOS
> funkiness) the kernel really needs full PAT support. That should allow
> WC over WB and WC over UC mappings to occur, at least if I'm
> remembering the docs right...
PAT only really helps for device driver performance optimizations.
But if the basic WB MTRRs are wrong PAT cannot really salvage it.
-Andi
next prev parent reply other threads:[~2007-09-20 6:50 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-09-14 16:33 MTRR initialization Howard Chu
2007-09-14 17:12 ` Yinghai Lu
2007-09-16 16:08 ` Howard Chu
2007-09-16 17:53 ` Yinghai Lu
2007-09-16 18:40 ` Eric W. Biederman
2007-09-18 17:53 ` Howard Chu
2007-09-18 18:18 ` Eric W. Biederman
2007-09-19 21:52 ` Jesse Barnes
2007-09-20 6:50 ` Andi Kleen [this message]
2007-09-20 12:05 ` Avi Kivity
2007-09-20 12:10 ` Andi Kleen
2007-09-20 12:46 ` Avi Kivity
2007-09-20 15:03 ` Jesse Barnes
2007-09-20 17:08 ` Jesse Barnes
2007-09-22 0:27 ` Siddha, Suresh B
2007-09-22 0:46 ` Howard Chu
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=p73d4wdal00.fsf@bingen.suse.de \
--to=andi@firstfloor.org \
--cc=hyc@symas.com \
--cc=jesse.barnes@intel.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