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Message-ID: <21115.20118.72541.74924@gargle.gargle.HOWL> Date: Thu, 7 Nov 2013 09:25:58 +0100 From: Mikael Pettersson <mikpelinux@...il.com> To: Yinghai Lu <yinghai@...nel.org> Cc: Mikael Pettersson <mikpelinux@...il.com>, Linux Kernel Mailing List <linux-kernel@...r.kernel.org> Subject: Re: [BUG?] mtrr sanitizer fails on Latitude E6230 Yinghai Lu writes: > On Wed, Nov 6, 2013 at 1:16 AM, Mikael Pettersson <mikpelinux@...il.com> wrote: > > I recently got a Dell Latitude E6230 (Ivy Bridge i7-3540M) and noticed that > > the mtrr sanitizer failed on it: > > > > === snip === > > Linux version 3.12.0 (mikpe@...ley) (gcc version 4.8.3 20131017 (prerelease) (GCC) ) #1 SMP Wed Nov 6 09:46:02 CET 2013 > > Command line: ro root=LABEL=/ resume=/dev/sda2 rd_NO_LUKS rd_NO_LVM rd_NO_MD rd_NO_DM LANG=en_US.UTF-8 SYSFONT=latarcyrheb-sun16 KEYTABLE=sv-latin1 > ... > gran_size: 8M chunk_size: 64M num_reg: 9 lose cover RAM: 6M > ... > > mtrr_cleanup: can not find optimal value > > please specify mtrr_gran_size/mtrr_chunk_size > > === snip === > > > > For now I'm disabling the mtrr sanitizer in this machine's kernel. > > Can you try to boot with "mtrr_gran_size=8m mtrr_chunk_size=64m" ? That results in: Linux version 3.12.0-test (mikpe@...ley) (gcc version 4.8.3 20131017 (prerelease) (GCC) ) #1 SMP Thu Nov 7 09:12:14 CET 2013 Command line: mtrr_gran_size=8m mtrr_chunk_size=64m ro root=LABEL=/ resume=/dev/sda2 rd_NO_LUKS rd_NO_LVM rd_NO_MD rd_NO_DM LANG=en_US.UTF-8 SYSFONT=latarcyrheb-sun16 KEYTABLE=sv-latin1 KERNEL supported cpus: Intel GenuineIntel e820: BIOS-provided physical RAM map: BIOS-e820: [mem 0x0000000000000000-0x000000000009d3ff] usable BIOS-e820: [mem 0x000000000009d400-0x000000000009ffff] reserved BIOS-e820: [mem 0x00000000000e0000-0x00000000000fffff] reserved BIOS-e820: [mem 0x0000000000100000-0x000000001fffffff] usable BIOS-e820: [mem 0x0000000020000000-0x00000000201fffff] reserved BIOS-e820: [mem 0x0000000020200000-0x0000000040003fff] usable BIOS-e820: [mem 0x0000000040004000-0x0000000040004fff] reserved BIOS-e820: [mem 0x0000000040005000-0x00000000d5f09fff] usable BIOS-e820: [mem 0x00000000d5f0a000-0x00000000d5ffffff] reserved BIOS-e820: [mem 0x00000000d6000000-0x00000000d6751fff] usable BIOS-e820: [mem 0x00000000d6752000-0x00000000d67fffff] reserved BIOS-e820: [mem 0x00000000d6800000-0x00000000d6fb2fff] usable BIOS-e820: [mem 0x00000000d6fb3000-0x00000000d6ffffff] ACPI data BIOS-e820: [mem 0x00000000d7000000-0x00000000d86fbfff] usable BIOS-e820: [mem 0x00000000d86fc000-0x00000000d87fffff] ACPI NVS BIOS-e820: [mem 0x00000000d8800000-0x00000000d96d4fff] usable BIOS-e820: [mem 0x00000000d96d5000-0x00000000da054fff] reserved BIOS-e820: [mem 0x00000000da055000-0x00000000da097fff] ACPI NVS BIOS-e820: [mem 0x00000000da098000-0x00000000daadcfff] usable BIOS-e820: [mem 0x00000000daadd000-0x00000000dafeffff] reserved BIOS-e820: [mem 0x00000000daff0000-0x00000000daffffff] usable BIOS-e820: [mem 0x00000000db800000-0x00000000df9fffff] reserved BIOS-e820: [mem 0x00000000f8000000-0x00000000fbffffff] reserved BIOS-e820: [mem 0x00000000fec00000-0x00000000fec00fff] reserved BIOS-e820: [mem 0x00000000fed00000-0x00000000fed03fff] reserved BIOS-e820: [mem 0x00000000fed1c000-0x00000000fed1ffff] reserved BIOS-e820: [mem 0x00000000fee00000-0x00000000fee00fff] reserved BIOS-e820: [mem 0x00000000ff000000-0x00000000ffffffff] reserved BIOS-e820: [mem 0x0000000100000000-0x000000021e5fffff] usable NX (Execute Disable) protection: active SMBIOS 2.7 present. DMI: Dell Inc. Latitude E6230/0Y47PX, BIOS A11 08/27/2013 e820: update [mem 0x00000000-0x00000fff] usable ==> reserved e820: remove [mem 0x000a0000-0x000fffff] usable e820: last_pfn = 0x21e600 max_arch_pfn = 0x400000000 MTRR default type: uncachable MTRR fixed ranges enabled: 00000-9FFFF write-back A0000-BFFFF uncachable C0000-CFFFF write-protect D0000-E7FFF uncachable E8000-FFFFF write-protect MTRR variable ranges enabled: 0 base 000000000 mask E00000000 write-back 1 base 200000000 mask FE0000000 write-back 2 base 0E0000000 mask FE0000000 uncachable 3 base 0DC000000 mask FFC000000 uncachable 4 base 0DB800000 mask FFF800000 uncachable 5 base 21F000000 mask FFF000000 uncachable 6 base 21E800000 mask FFF800000 uncachable 7 base 21E600000 mask FFFE00000 uncachable 8 disabled 9 disabled x86 PAT enabled: cpu 0, old 0x7040600070406, new 0x7010600070106 original variable MTRRs reg 0, base: 0GB, range: 8GB, type WB reg 1, base: 8GB, range: 512MB, type WB reg 2, base: 3584MB, range: 512MB, type UC reg 3, base: 3520MB, range: 64MB, type UC reg 4, base: 3512MB, range: 8MB, type UC reg 5, base: 8688MB, range: 16MB, type UC reg 6, base: 8680MB, range: 8MB, type UC reg 7, base: 8678MB, range: 2MB, type UC total RAM covered: 8094M gran_size: 8M chunk_size: 64M num_reg: 9 lose cover RAM: 6M New variable MTRRs reg 0, base: 0GB, range: 2GB, type WB reg 1, base: 2GB, range: 1GB, type WB reg 2, base: 3GB, range: 256MB, type WB reg 3, base: 3328MB, range: 128MB, type WB reg 4, base: 3456MB, range: 64MB, type WB reg 5, base: 3512MB, range: 8MB, type UC reg 6, base: 4GB, range: 4GB, type WB reg 7, base: 8GB, range: 512MB, type WB reg 8, base: 8672MB, range: 32MB, type UC e820: update [mem 0xdb800000-0xffffffff] usable ==> reserved e820: update [mem 0x21e000000-0x21e5fffff] usable ==> reserved WARNING: BIOS bug: CPU MTRRs don't cover all of memory, losing 6MB of RAM. update e820 for mtrr e820: modified physical RAM map: modified: [mem 0x0000000000000000-0x0000000000000fff] reserved modified: [mem 0x0000000000001000-0x000000000009d3ff] usable modified: [mem 0x000000000009d400-0x000000000009ffff] reserved modified: [mem 0x00000000000e0000-0x00000000000fffff] reserved modified: [mem 0x0000000000100000-0x000000001fffffff] usable modified: [mem 0x0000000020000000-0x00000000201fffff] reserved modified: [mem 0x0000000020200000-0x0000000040003fff] usable modified: [mem 0x0000000040004000-0x0000000040004fff] reserved modified: [mem 0x0000000040005000-0x00000000d5f09fff] usable modified: [mem 0x00000000d5f0a000-0x00000000d5ffffff] reserved modified: [mem 0x00000000d6000000-0x00000000d6751fff] usable modified: [mem 0x00000000d6752000-0x00000000d67fffff] reserved modified: [mem 0x00000000d6800000-0x00000000d6fb2fff] usable modified: [mem 0x00000000d6fb3000-0x00000000d6ffffff] ACPI data modified: [mem 0x00000000d7000000-0x00000000d86fbfff] usable modified: [mem 0x00000000d86fc000-0x00000000d87fffff] ACPI NVS modified: [mem 0x00000000d8800000-0x00000000d96d4fff] usable modified: [mem 0x00000000d96d5000-0x00000000da054fff] reserved modified: [mem 0x00000000da055000-0x00000000da097fff] ACPI NVS modified: [mem 0x00000000da098000-0x00000000daadcfff] usable modified: [mem 0x00000000daadd000-0x00000000dafeffff] reserved modified: [mem 0x00000000daff0000-0x00000000daffffff] usable modified: [mem 0x00000000db800000-0x00000000df9fffff] reserved modified: [mem 0x00000000f8000000-0x00000000fbffffff] reserved modified: [mem 0x00000000fec00000-0x00000000fec00fff] reserved modified: [mem 0x00000000fed00000-0x00000000fed03fff] reserved modified: [mem 0x00000000fed1c000-0x00000000fed1ffff] reserved modified: [mem 0x00000000fee00000-0x00000000fee00fff] reserved modified: [mem 0x00000000ff000000-0x00000000ffffffff] reserved modified: [mem 0x0000000100000000-0x000000021dffffff] usable modified: [mem 0x000000021e000000-0x000000021e5fffff] reserved /Mikael -- 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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