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Message-ID: <Pine.A41.4.64.0711051945280.708776@stalin.acc.umu.se>
Date:	Mon, 5 Nov 2007 19:46:18 +0100 (CET)
From:	Bo Brantén <bosse@....umu.se>
To:	"H. Peter Anvin" <hpa@...or.com>
cc:	linux-kernel@...r.kernel.org
Subject: Re: x86_64 ten times slower than i386

On Mon, 5 Nov 2007, H. Peter Anvin wrote:

>> reg00: base=0x00000000 (   0MB), size=2048MB: write-back, count=1
>> reg01: base=0x80000000 (2048MB), size=1024MB: write-back, count=1
>> reg02: base=0xc0000000 (3072MB), size= 256MB: write-back, count=1
>> reg03: base=0xcf800000 (3320MB), size=   8MB: uncachable, count=1
>> reg04: base=0xcf700000 (3319MB), size=   1MB: uncachable, count=1
>> reg05: base=0x100000000 (4096MB), size= 512MB: write-back, count=1
>> reg06: base=0x120000000 (4608MB), size= 128MB: write-back, count=1
>
> What does your e820 map look like?

BIOS-provided physical RAM map:
  BIOS-e820: 0000000000000000 - 000000000008f000 (usable)
  BIOS-e820: 000000000008f000 - 00000000000a0000 (reserved)
  BIOS-e820: 00000000000e0000 - 0000000000100000 (reserved)
  BIOS-e820: 0000000000100000 - 00000000cf561000 (usable)
  BIOS-e820: 00000000cf561000 - 00000000cf56e000 (reserved)
  BIOS-e820: 00000000cf56e000 - 00000000cf637000 (usable)
  BIOS-e820: 00000000cf637000 - 00000000cf6e9000 (ACPI NVS)
  BIOS-e820: 00000000cf6e9000 - 00000000cf6ed000 (usable)
  BIOS-e820: 00000000cf6ed000 - 00000000cf6f2000 (ACPI data)
  BIOS-e820: 00000000cf6f2000 - 00000000cf6f3000 (usable)
  BIOS-e820: 00000000cf6f3000 - 00000000cf6ff000 (ACPI data)
  BIOS-e820: 00000000cf6ff000 - 00000000cf700000 (usable)
  BIOS-e820: 00000000cf700000 - 00000000d0000000 (reserved)
  BIOS-e820: 00000000fff00000 - 0000000100000000 (reserved)
  BIOS-e820: 0000000100000000 - 000000012c000000 (usable)

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