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From: Andreas Herrmann <andreas.herrmann3@amd.com>
To: Rene Herman <rene.herman@keyaccess.nl>
Cc: Dave Airlie <airlied@gmail.com>,
	Shaohua Li <shaohua.li@intel.com>,
	Yinghai Lu <yhlu.kernel@gmail.com>,
	Arjan van de Ven <arjan@infradead.org>,
	dri-users@lists.sourceforge.net,
	Linux Kernel <linux-kernel@vger.kernel.org>
Subject: Re: AGP and PAT (induced?) problem (on AMD family 6)
Date: Wed, 6 Aug 2008 15:51:14 +0200	[thread overview]
Message-ID: <20080806135114.GB6713@alberich.amd.com> (raw)
In-Reply-To: <48972EA8.8040001@keyaccess.nl>

On Mon, Aug 04, 2008 at 06:30:32PM +0200, Rene Herman wrote:
> What _does_ solve this though is booting with the "nopat" command line 
> parameter. I'm on 2.6.26.1 and have enabled PAT for my AMD Duron myself. 
> With "nopat", there's no problem to be seen anymore -- exiting X 
> specifically is instantaneous.
>
> With or without PAT, my /proc/mtrr is always:
>
> reg00: base=0x00000000 (   0MB), size= 512MB: write-back, count=1
> reg01: base=0x20000000 ( 512MB), size= 256MB: write-back, count=1
> reg02: base=0xe8000000 (3712MB), size=  64MB: write-combining, count=1
>
> under X joined by:
>
> reg03: base=0xe4000000 (3648MB), size=  32MB: write-combining, count=2

To get some more debug data, can you please retest with latest kernel
(2.6.27-rc2) using "debugpat" kernel option and provide dmesg
output plus contents of <debugfs>/x86/pat_memtype_list?


Thanks,

Andreas



  reply	other threads:[~2008-08-06 13:52 UTC|newest]

Thread overview: 46+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-08-04 16:30 Rene Herman
2008-08-06 13:51 ` Andreas Herrmann [this message]
2008-08-06 20:57   ` Rene Herman
2008-08-11  9:46     ` Rene Herman
2008-08-15 14:22 ` Ingo Molnar
2008-08-15 15:24   ` Rene Herman
2008-08-19 10:11     ` Rene Herman
2008-08-19 10:26       ` Ingo Molnar
2008-08-19 14:19         ` Rene Herman
2008-08-19 19:07           ` Venki Pallipadi
2008-08-19 19:22             ` Rene Herman
2008-08-19 23:28               ` Venki Pallipadi
2008-08-20 10:09                 ` Ingo Molnar
2008-08-20 10:04             ` Ingo Molnar
2008-08-20 10:50               ` Rene Herman
2008-08-20 14:27                 ` Rene Herman
2008-08-20 19:41                   ` Venki Pallipadi
2008-08-20 21:40                     ` Rene Herman
2008-08-20 21:46                       ` Dave Airlie
2008-08-20 22:16                         ` Venki Pallipadi
2008-08-21  3:42                           ` Andi Kleen
2008-08-21 21:13                             ` Suresh Siddha
2008-08-22  2:12                               ` Andi Kleen
2008-08-21 12:06                           ` Ingo Molnar
2008-08-21 17:15                             ` Rene Herman
2008-08-21 22:10                               ` [PATCH] x86: {reverve,free}_memtype() take a physical address Rene Herman
2008-08-21 22:16                                 ` Pallipadi, Venkatesh
2008-08-21 22:26                                   ` Rene Herman
2008-08-21 22:57                                     ` Pallipadi, Venkatesh
2008-08-21 23:06                                       ` Rene Herman
2008-08-21 23:02                               ` [PATCH] x86: have set_memory_array_{uc,wb} coalesce memtypes Rene Herman
2008-08-22  4:15                                 ` Ingo Molnar
2008-08-22 19:08                                   ` Venki Pallipadi
2008-08-22 20:15                                     ` Rene Herman
2008-08-23 15:33                                       ` Ingo Molnar
2008-08-22 20:02                                   ` Rene Herman
2008-09-10 19:52                                     ` AGP PAT issue Rene Herman
2008-09-11  8:17                                       ` Ingo Molnar
2008-09-11  8:30                                         ` Rene Herman
2008-09-13  0:26                                           ` Pallipadi, Venkatesh
2008-09-13  0:44                                             ` Rene Herman
2008-10-09 15:53                                               ` Thomas Hellstrom
2008-10-13 17:10                                                 ` Pallipadi, Venkatesh
2008-10-13 19:26                                                   ` Thomas Hellström
2008-08-20 21:02                 ` AGP and PAT (induced?) problem (on AMD family 6) Dave Airlie
2008-08-20 21:16                   ` Rene Herman

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