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/
prev parent 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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