From: "H. Peter Anvin" <hpa@zytor.com>
To: Matthew Garrett <mjg@redhat.com>
Cc: linux-kernel@vger.kernel.org, x86@kernel.org, matt.fleming@intel.com
Subject: Re: [PATCH] EFI: Only set regions uncacheable if they support it
Date: Thu, 15 Mar 2012 07:47:57 -0700 [thread overview]
Message-ID: <4F62011D.4000708@zytor.com> (raw)
In-Reply-To: <20120315144236.GB4650@srcf.ucam.org>
On 03/15/2012 07:42 AM, Matthew Garrett wrote:
> On Thu, Mar 15, 2012 at 07:36:46AM -0700, H. Peter Anvin wrote:
>
>> I would still really like to understand why we're seeing #MCs... that's
>> bothersome all by itself.
>
> The region is the legacy video RAM, so I can imagine there being
> something magic about it.
>
WTF?! That should be UC at all times... it isn't even WC-capable.
Furthermore, we may need this region (assuming there is actually a video
card there.)
What do the fixed MTRRs look like?
-hpa
next prev parent reply other threads:[~2012-03-15 14:48 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-03-15 13:56 [PATCH] EFI: Only set regions uncacheable if they support it Matthew Garrett
2012-03-15 14:00 ` H. Peter Anvin
2012-03-15 14:07 ` Matthew Garrett
2012-03-15 14:17 ` H. Peter Anvin
2012-03-15 14:24 ` Matthew Garrett
2012-03-15 14:28 ` H. Peter Anvin
2012-03-15 14:33 ` Matthew Garrett
2012-03-15 14:36 ` H. Peter Anvin
2012-03-15 14:42 ` Matthew Garrett
2012-03-15 14:47 ` H. Peter Anvin [this message]
2012-03-15 14:54 ` Matthew Garrett
2012-03-15 14:51 ` Alan Cox
2012-03-15 14:54 ` Alan Cox
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=4F62011D.4000708@zytor.com \
--to=hpa@zytor.com \
--cc=linux-kernel@vger.kernel.org \
--cc=matt.fleming@intel.com \
--cc=mjg@redhat.com \
--cc=x86@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 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.