From: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
To: "H. Peter Anvin" <hpa@zytor.com>
Cc: Brice Goglin <brice.goglin@gmail.com>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
David Airlie <airlied@linux.ie>,
dri-devel@lists.freedesktop.org
Subject: Re: MTRR use in drivers
Date: Sun, 23 Jun 2013 16:29:36 -0300 [thread overview]
Message-ID: <20130623192936.GA28655@khazad-dum.debian.net> (raw)
In-Reply-To: <b8bfa877-5663-4a93-94b4-6ea313e4d563@email.android.com>
On Sun, 23 Jun 2013, H. Peter Anvin wrote:
> Why do you care about performance when PAT is disabled?
It will regress already slow boxes. We blacklist a LOT of P4s, PMs, etc and
nobody ever took the pain to track down which ones of those actually have
PAT+MTRR aliasing bugs.
These boxes have boards like the Radeon X300, which needs either PAT or MTRR
to not become unusable...
--
"One disk to rule them all, One disk to find them. One disk to bring
them all and in the darkness grind them. In the Land of Redmond
where the shadows lie." -- The Silicon Valley Tarot
Henrique Holschuh
next prev parent reply other threads:[~2013-06-23 19:29 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-06-21 5:00 H. Peter Anvin
2013-06-23 6:35 ` Brice Goglin
2013-06-23 14:07 ` H. Peter Anvin
2013-06-23 19:29 ` Henrique de Moraes Holschuh [this message]
2013-06-23 20:02 ` H. Peter Anvin
2013-06-23 20:30 ` Dave Airlie
2013-06-23 20:38 ` H. Peter Anvin
2013-06-23 20:54 ` Dave Airlie
2013-06-23 20:58 ` H. Peter Anvin
2013-06-23 21:27 ` Dave Airlie
2013-06-23 23:09 ` Andy Lutomirski
2013-06-23 21:56 ` Henrique de Moraes Holschuh
2013-06-23 22:10 ` H. Peter Anvin
2013-06-24 0:02 ` Henrique de Moraes Holschuh
2013-06-24 0:31 ` H. Peter Anvin
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