linux-kernel - RE: [patch 0/4] x86: PAT followup - Incremental changes and bug fixes

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Date:	Fri, 18 Jan 2008 09:13:10 -0800
From:	"Pallipadi, Venkatesh" <venkatesh.pallipadi@...el.com>
To:	"Andreas Herrmann3" <andreas.herrmann3@....com>
Cc:	"Ingo Molnar" <mingo@...e.hu>,
	"Siddha, Suresh B" <suresh.b.siddha@...el.com>, <ak@....de>,
	<ebiederm@...ssion.com>, <rdreier@...co.com>,
	<torvalds@...ux-foundation.org>, <gregkh@...e.de>,
	<airlied@...net.ie>, <davej@...hat.com>, <tglx@...utronix.de>,
	<hpa@...or.com>, <akpm@...ux-foundation.org>,
	<arjan@...radead.org>, "Barnes, Jesse" <jesse.barnes@...el.com>,
	<davem@...emloft.net>, <linux-kernel@...r.kernel.org>
Subject: RE: [patch 0/4] x86: PAT followup - Incremental changes and bug fixes

 

>-----Original Message-----
>From: Andreas Herrmann3 [mailto:andreas.herrmann3@....com] 
>Sent: Friday, January 18, 2008 8:11 AM
>To: Pallipadi, Venkatesh
>Cc: Ingo Molnar; Siddha, Suresh B; ak@....de; 
>ebiederm@...ssion.com; rdreier@...co.com; 
>torvalds@...ux-foundation.org; gregkh@...e.de; 
>airlied@...net.ie; davej@...hat.com; tglx@...utronix.de; 
>hpa@...or.com; akpm@...ux-foundation.org; arjan@...radead.org; 
>Barnes, Jesse; davem@...emloft.net; linux-kernel@...r.kernel.org
>Subject: Re: [patch 0/4] x86: PAT followup - Incremental 
>changes and bug fixes
>
>On Thu, Jan 17, 2008 at 03:04:10PM -0800, Venki Pallipadi wrote:
>>
>> Below is another potential fix for the problem here. Going 
>through ACPI
>> ioremap usages, we found at one place the mapping is cached 
>for possible
>> optimization reason and not unmapped later. Patch below always unmaps
>> ioremap at this place in ACPICA.
>
>The patch does not fix the problem. The conflicting cache 
>attributes are
>still there.
>

Andreas,

Could you also try the patch Suresh Siddha sent out yesterday. That
covers the case where the attribute was not getting removed even after
unmap was called.

Thanks,
Venki
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