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@barley) (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 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: 64K chunk_size: 64K num_reg: 10 lose cover RAM: 102M gran_size: 64K chunk_size: 128K num_reg: 10 lose cover RAM: 102M gran_size: 64K chunk_size: 256K num_reg: 10 lose cover RAM: 102M gran_size: 64K chunk_size: 512K num_reg: 10 lose cover RAM: 102M gran_size: 64K chunk_size: 1M num_reg: 10 lose cover RAM: 102M gran_size: 64K chunk_size: 2M num_reg: 10 lose cover RAM: 102M gran_size: 64K chunk_size: 4M num_reg: 10 lose cover RAM: 102M gran_size: 64K chunk_size: 8M num_reg: 10 lose cover RAM: 102M gran_size: 64K chunk_size: 16M num_reg: 10 lose cover RAM: 38M *BAD*gran_size: 64K chunk_size: 32M num_reg: 10 lose cover RAM: -16M *BAD*gran_size: 64K chunk_size: 64M num_reg: 10 lose cover RAM: -16M gran_size: 64K chunk_size: 128M num_reg: 10 lose cover RAM: 0G gran_size: 64K chunk_size: 256M num_reg: 10 lose cover RAM: 0G gran_size: 64K chunk_size: 512M num_reg: 10 lose cover RAM: 0G gran_size: 64K chunk_size: 1G num_reg: 10 lose cover RAM: 0G *BAD*gran_size: 64K chunk_size: 2G num_reg: 10 lose cover RAM: -1G gran_size: 128K chunk_size: 128K num_reg: 10 lose cover RAM: 102M gran_size: 128K chunk_size: 256K num_reg: 10 lose cover RAM: 102M gran_size: 128K chunk_size: 512K num_reg: 10 lose cover RAM: 102M gran_size: 128K chunk_size: 1M num_reg: 10 lose cover RAM: 102M gran_size: 128K chunk_size: 2M num_reg: 10 lose cover RAM: 102M gran_size: 128K chunk_size: 4M num_reg: 10 lose cover RAM: 102M gran_size: 128K chunk_size: 8M num_reg: 10 lose cover RAM: 102M gran_size: 128K chunk_size: 16M num_reg: 10 lose cover RAM: 38M *BAD*gran_size: 128K chunk_size: 32M num_reg: 10 lose cover RAM: -16M *BAD*gran_size: 128K chunk_size: 64M num_reg: 10 lose cover RAM: -16M gran_size: 128K chunk_size: 128M num_reg: 10 lose cover RAM: 0G gran_size: 128K chunk_size: 256M num_reg: 10 lose cover RAM: 0G gran_size: 128K chunk_size: 512M num_reg: 10 lose cover RAM: 0G gran_size: 128K chunk_size: 1G num_reg: 10 lose cover RAM: 0G *BAD*gran_size: 128K chunk_size: 2G num_reg: 10 lose cover RAM: -1G gran_size: 256K chunk_size: 256K num_reg: 10 lose cover RAM: 102M gran_size: 256K chunk_size: 512K num_reg: 10 lose cover RAM: 102M gran_size: 256K chunk_size: 1M num_reg: 10 lose cover RAM: 102M gran_size: 256K chunk_size: 2M num_reg: 10 lose cover RAM: 102M gran_size: 256K chunk_size: 4M num_reg: 10 lose cover RAM: 102M gran_size: 256K chunk_size: 8M num_reg: 10 lose cover RAM: 102M gran_size: 256K chunk_size: 16M num_reg: 10 lose cover RAM: 38M *BAD*gran_size: 256K chunk_size: 32M num_reg: 10 lose cover RAM: -16M *BAD*gran_size: 256K chunk_size: 64M num_reg: 10 lose cover RAM: -16M gran_size: 256K chunk_size: 128M num_reg: 10 lose cover RAM: 0G gran_size: 256K chunk_size: 256M num_reg: 10 lose cover RAM: 0G gran_size: 256K chunk_size: 512M num_reg: 10 lose cover RAM: 0G gran_size: 256K chunk_size: 1G num_reg: 10 lose cover RAM: 0G *BAD*gran_size: 256K chunk_size: 2G num_reg: 10 lose cover RAM: -1G gran_size: 512K chunk_size: 512K num_reg: 10 lose cover RAM: 102M gran_size: 512K chunk_size: 1M num_reg: 10 lose cover RAM: 102M gran_size: 512K chunk_size: 2M num_reg: 10 lose cover RAM: 102M gran_size: 512K chunk_size: 4M num_reg: 10 lose cover RAM: 102M gran_size: 512K chunk_size: 8M num_reg: 10 lose cover RAM: 102M gran_size: 512K chunk_size: 16M num_reg: 10 lose cover RAM: 38M *BAD*gran_size: 512K chunk_size: 32M num_reg: 10 lose cover RAM: -16M *BAD*gran_size: 512K chunk_size: 64M num_reg: 10 lose cover RAM: -16M gran_size: 512K chunk_size: 128M num_reg: 10 lose cover RAM: 0G gran_size: 512K chunk_size: 256M num_reg: 10 lose cover RAM: 0G gran_size: 512K chunk_size: 512M num_reg: 10 lose cover RAM: 0G gran_size: 512K chunk_size: 1G num_reg: 10 lose cover RAM: 0G *BAD*gran_size: 512K chunk_size: 2G num_reg: 10 lose cover RAM: -1G gran_size: 1M chunk_size: 1M num_reg: 10 lose cover RAM: 102M gran_size: 1M chunk_size: 2M num_reg: 10 lose cover RAM: 102M gran_size: 1M chunk_size: 4M num_reg: 10 lose cover RAM: 102M gran_size: 1M chunk_size: 8M num_reg: 10 lose cover RAM: 102M gran_size: 1M chunk_size: 16M num_reg: 10 lose cover RAM: 38M *BAD*gran_size: 1M chunk_size: 32M num_reg: 10 lose cover RAM: -16M *BAD*gran_size: 1M chunk_size: 64M num_reg: 10 lose cover RAM: -16M gran_size: 1M chunk_size: 128M num_reg: 10 lose cover RAM: 0G gran_size: 1M chunk_size: 256M num_reg: 10 lose cover RAM: 0G gran_size: 1M chunk_size: 512M num_reg: 10 lose cover RAM: 0G gran_size: 1M chunk_size: 1G num_reg: 10 lose cover RAM: 0G *BAD*gran_size: 1M chunk_size: 2G num_reg: 10 lose cover RAM: -1G gran_size: 2M chunk_size: 2M num_reg: 10 lose cover RAM: 102M gran_size: 2M chunk_size: 4M num_reg: 10 lose cover RAM: 102M gran_size: 2M chunk_size: 8M num_reg: 10 lose cover RAM: 102M gran_size: 2M chunk_size: 16M num_reg: 10 lose cover RAM: 38M *BAD*gran_size: 2M chunk_size: 32M num_reg: 10 lose cover RAM: -16M *BAD*gran_size: 2M chunk_size: 64M num_reg: 10 lose cover RAM: -16M gran_size: 2M chunk_size: 128M num_reg: 10 lose cover RAM: 0G gran_size: 2M chunk_size: 256M num_reg: 10 lose cover RAM: 0G gran_size: 2M chunk_size: 512M num_reg: 10 lose cover RAM: 0G gran_size: 2M chunk_size: 1G num_reg: 10 lose cover RAM: 0G *BAD*gran_size: 2M chunk_size: 2G num_reg: 10 lose cover RAM: -1G gran_size: 4M chunk_size: 4M num_reg: 10 lose cover RAM: 102M gran_size: 4M chunk_size: 8M num_reg: 10 lose cover RAM: 102M gran_size: 4M chunk_size: 16M num_reg: 10 lose cover RAM: 38M *BAD*gran_size: 4M chunk_size: 32M num_reg: 10 lose cover RAM: -14M *BAD*gran_size: 4M chunk_size: 64M num_reg: 10 lose cover RAM: -14M gran_size: 4M chunk_size: 128M num_reg: 10 lose cover RAM: 2M gran_size: 4M chunk_size: 256M num_reg: 10 lose cover RAM: 2M gran_size: 4M chunk_size: 512M num_reg: 10 lose cover RAM: 2M gran_size: 4M chunk_size: 1G num_reg: 10 lose cover RAM: 2M *BAD*gran_size: 4M chunk_size: 2G num_reg: 10 lose cover RAM: -1022M gran_size: 8M chunk_size: 8M num_reg: 10 lose cover RAM: 102M gran_size: 8M chunk_size: 16M num_reg: 10 lose cover RAM: 38M gran_size: 8M chunk_size: 32M num_reg: 10 lose cover RAM: 38M gran_size: 8M chunk_size: 64M num_reg: 9 lose cover RAM: 6M gran_size: 8M chunk_size: 128M num_reg: 8 lose cover RAM: 6M gran_size: 8M chunk_size: 256M num_reg: 8 lose cover RAM: 6M gran_size: 8M chunk_size: 512M num_reg: 8 lose cover RAM: 6M gran_size: 8M chunk_size: 1G num_reg: 8 lose cover RAM: 6M gran_size: 8M chunk_size: 2G num_reg: 9 lose cover RAM: 6M gran_size: 16M chunk_size: 16M num_reg: 10 lose cover RAM: 46M gran_size: 16M chunk_size: 32M num_reg: 10 lose cover RAM: 46M gran_size: 16M chunk_size: 64M num_reg: 9 lose cover RAM: 14M gran_size: 16M chunk_size: 128M num_reg: 8 lose cover RAM: 14M gran_size: 16M chunk_size: 256M num_reg: 8 lose cover RAM: 14M gran_size: 16M chunk_size: 512M num_reg: 8 lose cover RAM: 14M gran_size: 16M chunk_size: 1G num_reg: 8 lose cover RAM: 14M gran_size: 16M chunk_size: 2G num_reg: 9 lose cover RAM: 14M gran_size: 32M chunk_size: 32M num_reg: 10 lose cover RAM: 30M gran_size: 32M chunk_size: 64M num_reg: 9 lose cover RAM: 30M gran_size: 32M chunk_size: 128M num_reg: 8 lose cover RAM: 30M gran_size: 32M chunk_size: 256M num_reg: 8 lose cover RAM: 30M gran_size: 32M chunk_size: 512M num_reg: 8 lose cover RAM: 30M gran_size: 32M chunk_size: 1G num_reg: 8 lose cover RAM: 30M gran_size: 32M chunk_size: 2G num_reg: 9 lose cover RAM: 30M gran_size: 64M chunk_size: 64M num_reg: 8 lose cover RAM: 94M gran_size: 64M chunk_size: 128M num_reg: 7 lose cover RAM: 94M gran_size: 64M chunk_size: 256M num_reg: 7 lose cover RAM: 94M gran_size: 64M chunk_size: 512M num_reg: 7 lose cover RAM: 94M gran_size: 64M chunk_size: 1G num_reg: 7 lose cover RAM: 94M gran_size: 64M chunk_size: 2G num_reg: 8 lose cover RAM: 94M gran_size: 128M chunk_size: 128M num_reg: 7 lose cover RAM: 158M gran_size: 128M chunk_size: 256M num_reg: 7 lose cover RAM: 158M gran_size: 128M chunk_size: 512M num_reg: 7 lose cover RAM: 158M gran_size: 128M chunk_size: 1G num_reg: 7 lose cover RAM: 158M gran_size: 128M chunk_size: 2G num_reg: 8 lose cover RAM: 158M gran_size: 256M chunk_size: 256M num_reg: 5 lose cover RAM: 414M gran_size: 256M chunk_size: 512M num_reg: 7 lose cover RAM: 414M gran_size: 256M chunk_size: 1G num_reg: 7 lose cover RAM: 414M gran_size: 256M chunk_size: 2G num_reg: 8 lose cover RAM: 414M gran_size: 512M chunk_size: 512M num_reg: 3 lose cover RAM: 926M gran_size: 512M chunk_size: 1G num_reg: 3 lose cover RAM: 926M gran_size: 512M chunk_size: 2G num_reg: 3 lose cover RAM: 926M gran_size: 1G chunk_size: 1G num_reg: 3 lose cover RAM: 926M gran_size: 1G chunk_size: 2G num_reg: 3 lose cover RAM: 926M gran_size: 2G chunk_size: 2G num_reg: 2 lose cover RAM: 1950M 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. /Mikael -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
