[BUG?] mtrr sanitizer fails on Latitude E6230
From: Mikael Pettersson
Date: Wed Nov 06 2013 - 04:17:36 EST
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
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