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Date: Wed, 30 Apr 2008 06:12:40 +0200
From: Gabriel C <nix.or.die@...glemail.com>
To: Yinghai Lu <yhlu.kernel@...il.com>
CC: Andrew Morton <akpm@...ux-foundation.org>,
Ingo Molnar <mingo@...e.hu>, "H. Peter Anvin" <hpa@...or.com>,
Thomas Gleixner <tglx@...utronix.de>,
Mika Fischer <mika.fischer@...pnet.de>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 1/2] x86: mtrr cleanup for converting continuous to discrete
layout v7
Yinghai Lu wrote:
> please try the patches
>
> from
> http://lkml.org/lkml/2008/4/29/754
> http://lkml.org/lkml/2008/4/29/753
>
> in addtion to
>
> http://people.redhat.com/mingo/x86.git/README
> ( it has v8 already)
>
> and try with mtrr_gran_size=128m
Without any value I get :
...
[ 0.000000] Linux version 2.6.25-x86-latest.git-06598-g6a2c2ff-dirty (crazy@...r) (gcc version 4.3.0 (Frugalware Linux) ) #1 SMP PREEMPT Wed Apr 30 05:51:39 CEST 2008
[ 0.000000] Command line: root=/dev/sdb1 ro debug vga=0x317
[ 0.000000] BIOS-provided physical RAM map:
[ 0.000000] BIOS-e820: 0000000000000000 - 000000000009cc00 (usable)
[ 0.000000] BIOS-e820: 000000000009cc00 - 00000000000a0000 (reserved)
[ 0.000000] BIOS-e820: 00000000000e4000 - 0000000000100000 (reserved)
[ 0.000000] BIOS-e820: 0000000000100000 - 00000000cf550000 (usable)
[ 0.000000] BIOS-e820: 00000000cf550000 - 00000000cf55e000 (ACPI data)
[ 0.000000] BIOS-e820: 00000000cf55e000 - 00000000cf5e0000 (ACPI NVS)
[ 0.000000] BIOS-e820: 00000000cf5e0000 - 00000000cf600000 (reserved)
[ 0.000000] BIOS-e820: 00000000fee00000 - 00000000fee01000 (reserved)
[ 0.000000] BIOS-e820: 00000000ffc00000 - 0000000100000000 (reserved)
[ 0.000000] BIOS-e820: 0000000100000000 - 000000012c000000 (usable)
[ 0.000000] Entering add_active_range(0, 0, 156) 0 entries of 256 used
[ 0.000000] Entering add_active_range(0, 256, 849232) 1 entries of 256 used
[ 0.000000] Entering add_active_range(0, 1048576, 1228800) 2 entries of 256 used
[ 0.000000] max_pfn_mapped = 1228800
[ 0.000000] x86 PAT enabled: cpu 0, old 0x7040600070406, new 0x7010600070106
[ 0.000000] After WB checking
[ 0.000000] MTRR MAP PFN: 0000000000000000 - 000000000012c000
[ 0.000000] After UC checking
[ 0.000000] MTRR MAP PFN: 0000000000000000 - 00000000000cf600
[ 0.000000] MTRR MAP PFN: 0000000000100000 - 000000000012c000
[ 0.000000] MTRR MAP PFN: 00000000000cf800 - 00000000000d0000
[ 0.000000] After sorting
[ 0.000000] MTRR MAP PFN: 0000000000000000 - 00000000000cf600
[ 0.000000] MTRR MAP PFN: 00000000000cf800 - 00000000000d0000
[ 0.000000] MTRR MAP PFN: 0000000000100000 - 000000000012c000
[ 0.000000] range0: 0000000000000000 - 00000000c0000000
[ 0.000000] Setting variable MTRR 0, base: 0MB, range: 2048MB, type WB
[ 0.000000] Setting variable MTRR 1, base: 2048MB, range: 1024MB, type WB
[ 0.000000] range: 00000000c0000000 - 00000000cf600000
[ 0.000000] Setting variable MTRR 2, base: 3072MB, range: 128MB, type WB
[ 0.000000] Setting variable MTRR 3, base: 3200MB, range: 64MB, type WB
[ 0.000000] Setting variable MTRR 4, base: 3264MB, range: 32MB, type WB
[ 0.000000] Setting variable MTRR 5, base: 3296MB, range: 16MB, type WB
[ 0.000000] Setting variable MTRR 6, base: 3312MB, range: 4MB, type WB
[ 0.000000] Setting variable MTRR 7, base: 3316MB, range: 2MB, type WB
[ 0.000000] range0: 00000000cf800000 - 00000000df800000
[ 0.000000] range: 00000000df800000 - 00000000d0000000
[ 0.000000] DONE variable MTRRs
[ 0.000000] x86 PAT enabled: cpu 0, old 0x7010600070106, new 0x7010600070106
[ 0.000000] After WB checking
[ 0.000000] MTRR MAP PFN: 0000000000000000 - 00000000000cf600
[ 0.000000] After UC checking
[ 0.000000] MTRR MAP PFN: 0000000000000000 - 00000000000cf600
[ 0.000000] After sorting
[ 0.000000] MTRR MAP PFN: 0000000000000000 - 00000000000cf600
[ 0.000000] WARNING: BIOS bug: CPU MTRRs don't cover all of memory, losing 704MB of RAM.
[ 0.000000] update e820 for mtrr
[ 0.000000] modified physical RAM map:
[ 0.000000] modified: 0000000000000000 - 000000000009cc00 (usable)
[ 0.000000] modified: 000000000009cc00 - 00000000000a0000 (reserved)
[ 0.000000] modified: 00000000000e4000 - 0000000000100000 (reserved)
[ 0.000000] modified: 0000000000100000 - 00000000cf550000 (usable)
[ 0.000000] modified: 00000000cf550000 - 00000000cf55e000 (ACPI data)
[ 0.000000] modified: 00000000cf55e000 - 00000000cf5e0000 (ACPI NVS)
[ 0.000000] modified: 00000000cf5e0000 - 00000000cf600000 (reserved)
[ 0.000000] modified: 00000000fee00000 - 00000000fee01000 (reserved)
[ 0.000000] modified: 00000000ffc00000 - 000000012c000000 (reserved)
[ 0.000000] Entering add_active_range(0, 0, 156) 3 entries of 256 used
[ 0.000000] Entering add_active_range(0, 256, 849232) 3 entries of 256 used
[ 0.000000] max_pfn_mapped = 1228800
[ 0.000000] init_memory_mapping
...
[ 20.984343] [drm] Initialized i915 1.6.0 20060119 on minor 0
[ 21.450368] mtrr: no more MTRRs available
...
with mtrr_gran_size=128m I get :
...
[ 0.000000] Linux version 2.6.25-x86-latest.git-06598-g6a2c2ff-dirty (crazy@...r) (gcc version 4.3.0 (Frugalware Linux) ) #1 SMP PREEMPT Wed Apr 30 05:51:39 CEST 2008
[ 0.000000] Command line: root=/dev/sdb1 ro debug vga=0x317 mtrr_gran_size=128m
[ 0.000000] BIOS-provided physical RAM map:
[ 0.000000] BIOS-e820: 0000000000000000 - 000000000009cc00 (usable)
[ 0.000000] BIOS-e820: 000000000009cc00 - 00000000000a0000 (reserved)
[ 0.000000] BIOS-e820: 00000000000e4000 - 0000000000100000 (reserved)
[ 0.000000] BIOS-e820: 0000000000100000 - 00000000cf550000 (usable)
[ 0.000000] BIOS-e820: 00000000cf550000 - 00000000cf55e000 (ACPI data)
[ 0.000000] BIOS-e820: 00000000cf55e000 - 00000000cf5e0000 (ACPI NVS)
[ 0.000000] BIOS-e820: 00000000cf5e0000 - 00000000cf600000 (reserved)
[ 0.000000] BIOS-e820: 00000000fee00000 - 00000000fee01000 (reserved)
[ 0.000000] BIOS-e820: 00000000ffc00000 - 0000000100000000 (reserved)
[ 0.000000] BIOS-e820: 0000000100000000 - 000000012c000000 (usable)
[ 0.000000] Entering add_active_range(0, 0, 156) 0 entries of 256 used
[ 0.000000] Entering add_active_range(0, 256, 849232) 1 entries of 256 used
[ 0.000000] Entering add_active_range(0, 1048576, 1228800) 2 entries of 256 used
[ 0.000000] max_pfn_mapped = 1228800
[ 0.000000] x86 PAT enabled: cpu 0, old 0x7040600070406, new 0x7010600070106
[ 0.000000] After WB checking
[ 0.000000] MTRR MAP PFN: 0000000000000000 - 000000000012c000
[ 0.000000] After UC checking
[ 0.000000] MTRR MAP PFN: 0000000000000000 - 00000000000cf600
[ 0.000000] MTRR MAP PFN: 0000000000100000 - 000000000012c000
[ 0.000000] MTRR MAP PFN: 00000000000cf800 - 00000000000d0000
[ 0.000000] After sorting
[ 0.000000] MTRR MAP PFN: 0000000000000000 - 00000000000cf600
[ 0.000000] MTRR MAP PFN: 00000000000cf800 - 00000000000d0000
[ 0.000000] MTRR MAP PFN: 0000000000100000 - 000000000012c000
[ 0.000000] range0: 0000000000000000 - 00000000c0000000
[ 0.000000] Setting variable MTRR 0, base: 0MB, range: 2048MB, type WB
[ 0.000000] Setting variable MTRR 1, base: 2048MB, range: 1024MB, type WB
[ 0.000000] range: 00000000c0000000 - 00000000c8000000
[ 0.000000] Setting variable MTRR 2, base: 3072MB, range: 128MB, type WB
[ 0.000000] rangeX: 00000000d0000000 - 00000000d0000000
[ 0.000000] range0: 0000000100000000 - 0000000120000000
[ 0.000000] Setting variable MTRR 3, base: 4096MB, range: 512MB, type WB
[ 0.000000] range: 0000000120000000 - 0000000128000000
[ 0.000000] Setting variable MTRR 4, base: 4608MB, range: 128MB, type WB
[ 0.000000] DONE variable MTRRs
[ 0.000000] x86 PAT enabled: cpu 0, old 0x7010600070106, new 0x7010600070106
[ 0.000000] After WB checking
[ 0.000000] MTRR MAP PFN: 0000000000000000 - 00000000000c8000
[ 0.000000] MTRR MAP PFN: 0000000000100000 - 0000000000128000
[ 0.000000] After UC checking
[ 0.000000] MTRR MAP PFN: 0000000000000000 - 00000000000c8000
[ 0.000000] MTRR MAP PFN: 0000000000100000 - 0000000000128000
[ 0.000000] After sorting
[ 0.000000] MTRR MAP PFN: 0000000000000000 - 00000000000c8000
[ 0.000000] MTRR MAP PFN: 0000000000100000 - 0000000000128000
[ 0.000000] WARNING: BIOS bug: CPU MTRRs don't cover all of memory, losing 181MB of RAM.
[ 0.000000] update e820 for mtrr
[ 0.000000] modified physical RAM map:
[ 0.000000] modified: 0000000000000000 - 000000000009cc00 (usable)
[ 0.000000] modified: 000000000009cc00 - 00000000000a0000 (reserved)
[ 0.000000] modified: 00000000000e4000 - 0000000000100000 (reserved)
[ 0.000000] modified: 0000000000100000 - 00000000c8000000 (usable)
[ 0.000000] modified: 00000000c8000000 - 00000000cf550000 (reserved)
[ 0.000000] modified: 00000000cf550000 - 00000000cf55e000 (ACPI data)
[ 0.000000] modified: 00000000cf55e000 - 00000000cf5e0000 (ACPI NVS)
[ 0.000000] modified: 00000000cf5e0000 - 00000000cf600000 (reserved)
[ 0.000000] modified: 00000000fee00000 - 00000000fee01000 (reserved)
[ 0.000000] modified: 00000000ffc00000 - 0000000100000000 (reserved)
[ 0.000000] modified: 0000000100000000 - 0000000128000000 (usable)
[ 0.000000] modified: 0000000128000000 - 000000012c000000 (reserved)
[ 0.000000] Entering add_active_range(0, 0, 156) 3 entries of 256 used
[ 0.000000] Entering add_active_range(0, 256, 819200) 3 entries of 256 used
[ 0.000000] Entering add_active_range(0, 1048576, 1212416) 3 entries of 256 used
[ 0.000000] max_pfn_mapped = 1228800
[ 0.000000] init_memory_mapping
...
I will try tomorrow some more boot options but now I need some sleep ;)
>
> Thanks
>
> YH
>
Gabriel
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