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Date: Tue, 29 Apr 2008 21:25:52 -0700 From: "Yinghai Lu" <yhlu.kernel@...il.com> To: "Gabriel C" <nix.or.die@...glemail.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 On Tue, Apr 29, 2008 at 9:12 PM, Gabriel C <nix.or.die@...glemail.com> wrote: > > 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. let's try different mtrr_chunk_size/mtrr_gran_size to get back more ram. under mtrr_gran_size=128m, does the your X server work well..., fast or slow? YH YH -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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