From: "Michel Dänzer" <michel@daenzer.net>
To: "Christian König" <deathsimple@vodafone.de>
Cc: dri-devel@lists.freedesktop.org
Subject: Re: [PATCH] drm/radeon: Don't try to enable write-combining without PAT
Date: Thu, 05 Feb 2015 10:08:47 +0900 [thread overview]
Message-ID: <54D2C29F.6010803@daenzer.net> (raw)
In-Reply-To: <54D1EB2D.7030601@vodafone.de>
On 04.02.2015 18:49, Christian König wrote:
> Am 04.02.2015 um 02:19 schrieb Michel Dänzer:
>> From: Michel Dänzer <michel.daenzer@amd.com>
>>
>> Doing so can cause things to become slow.
>>
>> Print a warning at compile time and an informative message at runtime in
>> that case.
>>
>> Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=88758
>> Cc: stable@vger.kernel.org
>> Signed-off-by: Michel Dänzer <michel.daenzer@amd.com>
>
> Interesting I wonder what the rational behind this is. I mean
> CONFIG_X86_PAT will obviously affect write combining, but why does it
> slow down things if we request something that the kernel isn't
> configured for?
Yeah, I'm not sure exactly what happens in that case, but I don't care
too much, since PAT is clearly desirable anyway.
> Anyway, patch is Reviewed-by: Christian König <christian.koenig@amd.com>
Thanks!
--
Earthling Michel Dänzer | http://www.amd.com
Libre software enthusiast | Mesa and X developer
_______________________________________________
dri-devel mailing list
dri-devel@lists.freedesktop.org
http://lists.freedesktop.org/mailman/listinfo/dri-devel
prev parent reply other threads:[~2015-02-05 1:08 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-02-04 1:19 [PATCH] drm/radeon: Don't try to enable write-combining without PAT Michel Dänzer
2015-02-04 9:49 ` Christian König
2015-02-04 22:37 ` Alex Deucher
2015-02-05 1:08 ` Michel Dänzer [this message]
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=54D2C29F.6010803@daenzer.net \
--to=michel@daenzer.net \
--cc=deathsimple@vodafone.de \
--cc=dri-devel@lists.freedesktop.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.