linux-kernel - Re: [patch 0/6] PAT fixes/cleanup following the pfnmap changes

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Message-ID: <496A2580.2080103@gmail.com>
Date:	Sun, 11 Jan 2009 12:59:44 -0400
From:	Kevin Winchester <kjwinchester@...il.com>
To:	Ingo Molnar <mingo@...e.hu>
CC:	venkatesh.pallipadi@...el.com, tglx@...utronix.de, hpa@...or.com,
	linux-kernel@...r.kernel.org, suresh.b.siddha@...el.com
Subject: Re: [patch 0/6] PAT fixes/cleanup following the pfnmap changes

Ingo Molnar wrote:
> * Kevin Winchester <kjwinchester@...il.com> wrote:
> 
>> venkatesh.pallipadi@...el.com wrote:
>>> Individual patch header has descriptions.
>>>
>> $ git am Patches
>> Applying: x86 PAT: change track_pfn_vma_new to take pgprot_t pointer param
>> error: patch failed: mm/memory.c:1604
>> error: mm/memory.c: patch does not apply
>> Patch failed at 0001.
>> When you have resolved this problem run "git am --resolved".
>> If you would prefer to skip this patch, instead run "git am --skip".
>> To restore the original branch and stop patching run "git am --abort".
>>
>> These do not apply for me to latest Linus git, which is the tree where I 
>> experienced the problem.  Is there some way to fuzz them to get them to 
>> apply?
> 
> Could you check tip/master:
> 
>   http://people.redhat.com/mingo/tip.git/README
> 
> do you still get the messages? [ Btw., did you also experience any 3D 
> performance problems that are solved via Venki's fixes in tip/master? ]
> 

I just checked tip/master, and I do still get the messages:

[   66.895807] X:5022 map pfn expected mapping type write-back for d0000000-d0101000, got write-combining
[   66.895873] X:5022 freeing invalid memtype d0000000-d0101000

As for 3D performance issues, glxgears without any other applications running gives:

    457 frames in 5.0 seconds = 91.312 FPS
    475 frames in 5.0 seconds = 94.887 FPS
    478 frames in 5.0 seconds = 95.411 FPS

I can't say for sure, but I expect those numbers should be much higher for a 3D accelerated radeon card (even if it is a little old):

    01:00.0 VGA compatible controller: ATI Technologies Inc M9+ 5C61 [Radeon Mobility 9200 (AGP)] (rev 01)

glxinfo gives:

    direct rendering: Yes


Anything else I can try?

-- 
Kevin Winchester
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