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Message-ID: <4817C52A.8000000@googlemail.com> Date: Wed, 30 Apr 2008 03:02:34 +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: > On Tue, Apr 29, 2008 at 5:06 PM, Gabriel C <nix.or.die@...glemail.com> wrote: >> 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 >> > please check attached debug patch... Here the output : ... [ 0.000000] Linux version 2.6.25-06598-g33ae0cd-dirty (crazy@...r) (gcc version 4.3.0 (Frugalware Linux) ) #814 SMP PREEMPT Wed Apr 30 02:47:52 CEST 2008 [ 0.000000] Command line: root=/dev/sdb1 ro debug vga=0x317 mtrr_chunk_size=256m 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] trimm e820 for MTRR MAP (UC): 0000000000128000 - 000000000012c000 [ 0.000000] WARNING: BIOS bug: CPU MTRRs don't cover all of memory, losing 64MB of RAM. [ 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] trimm e820 for MTRR MAP (UC): 00000000000c8000 - 0000000000100000 [ 0.000000] WARNING: BIOS bug: CPU MTRRs don't cover all of memory, losing 757MB of RAM. [ 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 ... ( this kernel is still not build with your second cleanup patch will do so in next run ) Also let me know if you want me to boot with any other mtrr_chunk_size / mtrr_gran_size values. > > THanks > > Yinghai Lu > 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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