linux-kernel - Re: AGP and PAT (induced?) problem (on AMD family 6)

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Message-ID: <48A59FAC.7050605@keyaccess.nl>
Date:	Fri, 15 Aug 2008 17:24:28 +0200
From:	Rene Herman <rene.herman@...access.nl>
To:	Ingo Molnar <mingo@...e.hu>
CC:	Dave Airlie <airlied@...il.com>, Shaohua Li <shaohua.li@...el.com>,
	Yinghai Lu <yhlu.kernel@...il.com>,
	Andreas Herrmann <andreas.herrmann3@....com>,
	Arjan van de Ven <arjan@...radead.org>,
	dri-users@...ts.sourceforge.net,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	Suresh Siddha <suresh.b.siddha@...el.com>,
	"Pallipadi, Venkatesh" <venkatesh.pallipadi@...el.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	"H. Peter Anvin" <hpa@...or.com>
Subject: Re: AGP and PAT (induced?) problem (on AMD family 6)

On 15-08-08 16:22, Ingo Molnar wrote:

> (more people Cc:-ed)

Thank you. Additional information at http://lkml.org/lkml/2008/8/6/449

> agreed - +12 seconds wait suggest some rather fundamental breakage.
> Did we go back to uncached for some critical display area that makes
> X start up (shut down) that slowly? Did we mark the BIOS uncacheable
> perhaps, causing X to execute BIOS code very slowly?

Quite a lot "uncached-minus" in those lists. I am desperately trying to 
avoid a clue about mostly anything graphics related so, "I dunno".

I haven't just disabled PAT yet (although I was about to just do so) and 
am available for testing.

Rene.
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