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Date: Wed, 30 Apr 2008 02:06:41 +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 Gabriel C wrote: > Yinghai Lu wrote: >> On Tue, Apr 29, 2008 at 1:25 PM, Gabriel C <nix.or.die@...glemail.com> wrote: >>> Yinghai Lu wrote: >>> > On Tue, Apr 29, 2008 at 4:51 AM, Gabriel C <nix.or.die@...glemail.com> wrote: >>> >> Yinghai Lu wrote: >>> >> > On Tue, Apr 29, 2008 at 3:30 AM, Yinghai Lu <yhlu.kernel@...il.com> wrote: >>> >> >> On Tue, Apr 29, 2008 at 2:47 AM, Gabriel C <nix.or.die@...glemail.com> wrote: >>> >> >> > Yinghai Lu wrote: >>> >> >> > > some BIOS like to use continus MTRR layout, and may X driver can not add >>> >> >> > > WB entries for graphical cards when 4g or more RAM installed. >>> >> >> > > >>> >> >> > > the patch will change MTRR to discrete. >>> >> >> > > >>> >> >> > > mtrr_chunk_size= could be used to have smaller continuous block to hold holes. >>> >> >> > > default is 256m, could be set according to size of graphics card memory. >>> >> >> > > >>> >> >> > > v2: fix -1 for UC checking >>> >> >> > > v3: default to disable, and need use enable_mtrr_cleanup to enable this feature >>> >> >> > > skip the var state change warning. >>> >> >> > > remove next_basek in range_to_mtrr() >>> >> >> > > v4: correct warning mask. >>> >> >> > > v5: CONFIG_MTRR_SANITIZER >>> >> >> > > v6: fix 1g, 2g, 512 aligment with extra hole >>> >> >> > > v7: gran_sizek to prevent running out of MTRRs. >>> >> >> > > >>> >> >> > >>> >> >> > With this version ( and patch http://lkml.org/lkml/2008/4/29/97 ) applyed on latest linus git tree >>> >> >> > the box OOPS'es early. >>> >> >> > >>> >> >> > Sorry I don't have time right now to write down the part of the OOPS I can see on monitor , I can try to find >>> >> >> > some time later. >>> >> >> > >>> >> >> > In any way OOPS'es on __free_one_page+0x191/0x21e >>> >> >> >>> >> >> thanks. found one problem with hole_basek ... >>> >> >> >>> >> >> will send you v8, and hope it will be last version. >>> >> > >>> >> > please try v8, it should get rid of the 8m entry. it need patch >>> >> > http://lkml.org/lkml/2008/4/29/97 too. >>> >> >>> >> Box does boot with v8 but now I get that warning you fixed in v2 again =): >>> >> >>> >> .... >>> >> [ 0.000000] Linux version 2.6.25-06058-ga01e035-dirty (crazy@...r) (gcc version 4.3.0 (Frugalware Linux) ) #805 SMP PREEMPT Tue Apr 29 13:04:49 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 - 00000000d0000000 >>> >> [ 0.000000] Setting variable MTRR 2, base: 3072MB, range: 256MB, type WB >>> >> [ 0.000000] hole: 00000000cc000000 - 00000000d0000000 >>> >> [ 0.000000] Setting variable MTRR 3, base: 3264MB, range: 64MB, type UC >>> >> [ 0.000000] rangeX: 00000000d0000000 - 00000000d0000000 >>> >> [ 0.000000] range0: 0000000100000000 - 0000000120000000 >>> >> [ 0.000000] Setting variable MTRR 4, base: 4096MB, range: 512MB, type WB >>> >> [ 0.000000] range: 0000000120000000 - 0000000130000000 >>> >> [ 0.000000] Setting variable MTRR 5, base: 4608MB, range: 256MB, type WB >>> >> [ 0.000000] hole: 000000012c000000 - 0000000130000000 >>> >> [ 0.000000] Setting variable MTRR 6, base: 4800MB, range: 64MB, type UC >>> >> [ 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 - 00000000000d0000 >>> >> [ 0.000000] MTRR MAP PFN: 0000000000100000 - 0000000000130000 >>> >> [ 0.000000] After UC checking >>> >> [ 0.000000] MTRR MAP PFN: 0000000000000000 - 00000000000cc000 >>> >> [ 0.000000] MTRR MAP PFN: 0000000000100000 - 000000000012c000 >>> >> [ 0.000000] After sorting >>> >> [ 0.000000] MTRR MAP PFN: 0000000000000000 - 00000000000cc000 >>> >> [ 0.000000] MTRR MAP PFN: 0000000000100000 - 000000000012c000 >>> >> [ 0.000000] WARNING: BIOS bug: CPU MTRRs don't cover all of memory, losing 757MB of RAM. >>> > >>> > so >>> >> [ 0.000000] MTRR MAP PFN: 0000000000000000 - 00000000000cf600 >>> >> [ 0.000000] MTRR MAP PFN: 00000000000cf800 - 00000000000d0000 >>> >> [ 0.000000] MTRR MAP PFN: 0000000000100000 - 000000000012c000 >>> > ===> >>> >> [ 0.000000] MTRR MAP PFN: 0000000000000000 - 00000000000cc000 >>> >> [ 0.000000] MTRR MAP PFN: 0000000000100000 - 000000000012c000 >>> > >>> > please try >>> >>> Now I have 2 warnings >>> >>> >>> > mtrr_chunk_size=512m mtrr_gran_size=128m >>> >>> ... >>> >>> [ 0.000000] Command line: root=/dev/sdb1 ro debug vga=0x317 mtrr_chunk_size=512m mtrr_gran_size=128m 3 >>> >>> >>> [ 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 64MB of RAM. >>> [ 0.000000] ------------[ cut here ]------------ >>> [ 0.000000] WARNING: at arch/x86/kernel/cpu/mtrr/main.c:1206 mtrr_trim_uncached_memory+0x25b/0x35a() >>> >>> [ 0.000000] Modules linked in: >>> [ 0.000000] Pid: 0, comm: swapper Not tainted 2.6.25-06058-ga01e035-dirty #805 >>> [ 0.000000] >>> [ 0.000000] Call Trace: >>> [ 0.000000] [<ffffffff8022d661>] warn_on_slowpath+0x51/0x78 >>> [ 0.000000] [<ffffffff8067f0dc>] x86_get_mtrr_mem_range+0x241/0x25c >>> [ 0.000000] [<ffffffff8067d93e>] update_memory_range+0x95/0xb7 >>> [ 0.000000] [<ffffffff8067fa51>] mtrr_trim_uncached_memory+0x25b/0x35a >>> >>> [ 0.000000] [<ffffffff8067ca43>] setup_arch+0x280/0x4a2 >>> [ 0.000000] [<ffffffff80676aa6>] start_kernel+0x6e/0x308 >>> [ 0.000000] [<ffffffff80676432>] x86_64_start_kernel+0x241/0x24a >>> [ 0.000000] >>> [ 0.000000] ---[ end trace ca143223eefdc828 ]--- >>> [ 0.000000] update e820 for mtrr -- end_pfn >>> [ 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 - 0000000100000000 (reserved) >>> [ 0.000000] modified: 0000000100000000 - 0000000128000000 (usable) >>> [ 0.000000] modified: 0000000128000000 - 000000012c000000 (reserved) >>> >>> [ 0.000000] WARNING: BIOS bug: CPU MTRRs don't cover all of memory, losing 757MB of RAM. >>> >>> [ 0.000000] ------------[ cut here ]------------ >>> [ 0.000000] WARNING: at arch/x86/kernel/cpu/mtrr/main.c:1227 mtrr_trim_uncached_memory+0x30c/0x35a() >>> [ 0.000000] Modules linked in: >>> [ 0.000000] Pid: 0, comm: swapper Not tainted 2.6.25-06058-ga01e035-dirty #805 >>> [ 0.000000] >>> [ 0.000000] Call Trace: >>> [ 0.000000] [<ffffffff8022d661>] warn_on_slowpath+0x51/0x78 >>> [ 0.000000] [<ffffffff8067f0dc>] x86_get_mtrr_mem_range+0x241/0x25c >>> [ 0.000000] [<ffffffff8067d93e>] update_memory_range+0x95/0xb7 >>> [ 0.000000] [<ffffffff8067fb02>] mtrr_trim_uncached_memory+0x30c/0x35a >>> [ 0.000000] [<ffffffff8067ca43>] setup_arch+0x280/0x4a2 >>> [ 0.000000] [<ffffffff80676aa6>] start_kernel+0x6e/0x308 >>> [ 0.000000] [<ffffffff80676432>] x86_64_start_kernel+0x241/0x24a >>> [ 0.000000] >>> [ 0.000000] ---[ end trace ca143223eefdc828 ]--- >>> [ 0.000000] update e820 for mtrr -- holes >>> [ 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 - 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 >> please try attached trim_holes_fix.patch..., it will fix the trim hole problem. > > Tested but warning is still there. I try to boot with mtrr_chunk_size / mtrr_gran_size and see what I get. > > ... > > [ 0.000000] Linux version 2.6.25-06589-gc65a350-dirty (crazy@...r) (gcc version 4.3.0 (Frugalware Linux) ) #808 SMP PREEMPT Wed Apr 30 01:37:38 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 - 00000000d0000000 > [ 0.000000] Setting variable MTRR 2, base: 3072MB, range: 256MB, type WB > [ 0.000000] hole: 00000000cc000000 - 00000000d0000000 > [ 0.000000] Setting variable MTRR 3, base: 3264MB, range: 64MB, type UC > [ 0.000000] rangeX: 00000000d0000000 - 00000000d0000000 > [ 0.000000] range0: 0000000100000000 - 0000000120000000 > [ 0.000000] Setting variable MTRR 4, base: 4096MB, range: 512MB, type WB > [ 0.000000] range: 0000000120000000 - 0000000130000000 > [ 0.000000] Setting variable MTRR 5, base: 4608MB, range: 256MB, type WB > [ 0.000000] hole: 000000012c000000 - 0000000130000000 > [ 0.000000] Setting variable MTRR 6, base: 4800MB, range: 64MB, type UC > [ 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 - 00000000000d0000 > [ 0.000000] MTRR MAP PFN: 0000000000100000 - 0000000000130000 > [ 0.000000] After UC checking > [ 0.000000] MTRR MAP PFN: 0000000000000000 - 00000000000cc000 > [ 0.000000] MTRR MAP PFN: 0000000000100000 - 000000000012c000 > [ 0.000000] After sorting > [ 0.000000] MTRR MAP PFN: 0000000000000000 - 00000000000cc000 > [ 0.000000] MTRR MAP PFN: 0000000000100000 - 000000000012c000 > [ 0.000000] WARNING: BIOS bug: CPU MTRRs don't cover all of memory, losing 757MB of RAM. > [ 0.000000] ------------[ cut here ]------------ > [ 0.000000] WARNING: at arch/x86/kernel/cpu/mtrr/main.c:1227 mtrr_trim_uncached_memory+0x313/0x361() > [ 0.000000] Modules linked in: > [ 0.000000] Pid: 0, comm: swapper Not tainted 2.6.25-06589-gc65a350-dirty #808 > [ 0.000000] > [ 0.000000] Call Trace: > [ 0.000000] [<ffffffff8022d699>] warn_on_slowpath+0x51/0x8c > [ 0.000000] [<ffffffff806810b4>] x86_get_mtrr_mem_range+0x241/0x25c > [ 0.000000] [<ffffffff8067f915>] update_memory_range+0x95/0xb7 > [ 0.000000] [<ffffffff80681ae1>] mtrr_trim_uncached_memory+0x313/0x361 > [ 0.000000] [<ffffffff8067ea16>] setup_arch+0x280/0x4a6 > [ 0.000000] [<ffffffff80678a3d>] start_kernel+0x6e/0x30d > [ 0.000000] [<ffffffff80678432>] x86_64_start_kernel+0x241/0x24a > [ 0.000000] > [ 0.000000] ---[ end trace 4eaa2a86a8e2da22 ]--- > [ 0.000000] update e820 for mtrr -- holes > [ 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 - 00000000cc000000 (usable) > [ 0.000000] modified: 00000000cc000000 - 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 - 000000012c000000 (reserved) > [ 0.000000] Entering add_active_range(0, 0, 156) 3 entries of 256 used > [ 0.000000] Entering add_active_range(0, 256, 835584) 3 entries of 256 used > [ 0.000000] max_pfn_mapped = 1228800 > [ 0.000000] init_memory_mapping > > ... > with mtrr_chunk_size=256m mtrr_gran_size=128m I'm getting : ... [ 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 64MB of RAM. [ 0.000000] ------------[ cut here ]------------ [ 0.000000] WARNING: at arch/x86/kernel/cpu/mtrr/main.c:1206 mtrr_trim_uncached_memory+0x25b/0x361() [ 0.000000] Modules linked in: [ 0.000000] Pid: 0, comm: swapper Not tainted 2.6.25-06589-gc65a350-dirty #808 [ 0.000000] [ 0.000000] Call Trace: [ 0.000000] [<ffffffff8022d699>] warn_on_slowpath+0x51/0x8c [ 0.000000] [<ffffffff806810b4>] x86_get_mtrr_mem_range+0x241/0x25c [ 0.000000] [<ffffffff8067f915>] update_memory_range+0x95/0xb7 [ 0.000000] [<ffffffff80681a29>] mtrr_trim_uncached_memory+0x25b/0x361 [ 0.000000] [<ffffffff8067ea16>] setup_arch+0x280/0x4a6 [ 0.000000] [<ffffffff80678a3d>] start_kernel+0x6e/0x30d [ 0.000000] [<ffffffff80678432>] x86_64_start_kernel+0x241/0x24a [ 0.000000] [ 0.000000] ---[ end trace 4eaa2a86a8e2da22 ]--- [ 0.000000] update e820 for mtrr -- end_pfn [ 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 - 0000000100000000 (reserved) [ 0.000000] modified: 0000000100000000 - 0000000128000000 (usable) [ 0.000000] modified: 0000000128000000 - 000000012c000000 (reserved) [ 0.000000] WARNING: BIOS bug: CPU MTRRs don't cover all of memory, losing 757MB of RAM. [ 0.000000] ------------[ cut here ]------------ [ 0.000000] WARNING: at arch/x86/kernel/cpu/mtrr/main.c:1227 mtrr_trim_uncached_memory+0x313/0x361() [ 0.000000] Modules linked in: [ 0.000000] Pid: 0, comm: swapper Tainted: G W 2.6.25-06589-gc65a350-dirty #808 [ 0.000000] [ 0.000000] Call Trace: [ 0.000000] [<ffffffff8022d699>] warn_on_slowpath+0x51/0x8c [ 0.000000] [<ffffffff806810b4>] x86_get_mtrr_mem_range+0x241/0x25c [ 0.000000] [<ffffffff8067f915>] update_memory_range+0x95/0xb7 [ 0.000000] [<ffffffff80681ae1>] mtrr_trim_uncached_memory+0x313/0x361 [ 0.000000] [<ffffffff8067ea16>] setup_arch+0x280/0x4a6 [ 0.000000] [<ffffffff80678a3d>] start_kernel+0x6e/0x30d [ 0.000000] [<ffffffff80678432>] x86_64_start_kernel+0x241/0x24a [ 0.000000] [ 0.000000] ---[ end trace 4eaa2a86a8e2da22 ]--- [ 0.000000] update e820 for mtrr -- holes [ 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 - 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] max_pfn_mapped = 1228800 [ 0.000000] init_memory_mapping ... Gabriel -- 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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