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From: Howard Chu <hyc@symas.com>
To: "Siddha, Suresh B" <suresh.b.siddha@intel.com>
Cc: linux-kernel <linux-kernel@vger.kernel.org>
Subject: Re: MTRR initialization
Date: Fri, 21 Sep 2007 17:46:59 -0700	[thread overview]
Message-ID: <46F46603.8040208@symas.com> (raw)
In-Reply-To: <20070922002717.GA16353@linux-os.sc.intel.com>

Siddha, Suresh B wrote:
> On Fri, Sep 14, 2007 at 09:33:30AM -0700, Howard Chu wrote:
>> So now I have this, which is pretty much
>> what
>> I wanted:
>>
>> reg00: base=0x00000000 (   0MB), size=2048MB: write-back, count=1
>> reg01: base=0x80000000 (2048MB), size=1024MB: write-back, count=1
>> reg02: base=0x100000000 (4096MB), size=1024MB: write-back, count=1
>> reg03: base=0xc0000000 (3072MB), size=1024MB: uncachable, count=1
>> reg04: base=0xc0000000 (3072MB), size= 256MB: write-combining, count=1
>> reg05: base=0xd0000000 (3328MB), size= 256MB: write-combining, count=1
> 
> BTW, having overlapping WC, UC regions make the end result UC. So in this
> case, you may not be getting the desired performance.

Thanks, I noticed that later. I simply deleted the UC mapping since it was no 
longer needed.
-- 
   -- Howard Chu
   Chief Architect, Symas Corp.  http://www.symas.com
   Director, Highland Sun        http://highlandsun.com/hyc/
   Chief Architect, OpenLDAP     http://www.openldap.org/project/

      reply	other threads:[~2007-09-22  0:49 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-09-14 16:33 MTRR initialization Howard Chu
2007-09-14 17:12 ` Yinghai Lu
2007-09-16 16:08   ` Howard Chu
2007-09-16 17:53     ` Yinghai Lu
2007-09-16 18:40       ` Eric W. Biederman
2007-09-18 17:53         ` Howard Chu
2007-09-18 18:18           ` Eric W. Biederman
2007-09-19 21:52 ` Jesse Barnes
2007-09-20  6:50   ` Andi Kleen
2007-09-20 12:05     ` Avi Kivity
2007-09-20 12:10       ` Andi Kleen
2007-09-20 12:46         ` Avi Kivity
2007-09-20 15:03     ` Jesse Barnes
2007-09-20 17:08       ` Jesse Barnes
2007-09-22  0:27 ` Siddha, Suresh B
2007-09-22  0:46   ` Howard Chu [this message]

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