Good Day All,
Today I looked at the dmesg log and I notice that the following messages
regarding mtrr_gran_size/mtrr_chunk_size.
I am currently running CentOS 6.3 and I installed CentOS 6.2 and 6.1 and I
was seeing the same errors. When I installed CentOS 5.8 on the same laptop
I do not see these errors.
$ lsb_release -a
LSB Version:
:core-4.0-amd64:core-4.0-noarch:graphics-4.0-amd64:graphics-4.0-noarch:printing-4.0-amd64:printing-4.0-noarch
Distributor ID: CentOS
Description: CentOS release 6.3 (Final)
Release: 6.3
Codename: Final
Below is an excerpt from dmesg
BIOS-provided physical RAM map:
BIOS-e820: 0000000000000000 - 000000000009e800 (usable)
BIOS-e820: 000000000009e800 - 00000000000a0000 (reserved)
BIOS-e820: 00000000000e0000 - 0000000000100000 (reserved)
BIOS-e820: 0000000000100000 - 0000000020000000 (usable)
BIOS-e820: 0000000020000000 - 0000000020200000 (reserved)
BIOS-e820: 0000000020200000 - 0000000040000000 (usable)
BIOS-e820: 0000000040000000 - 0000000040200000 (reserved)
BIOS-e820: 0000000040200000 - 00000000aac0c000 (usable)
BIOS-e820: 00000000aac0c000 - 00000000aad8e000 (reserved)
BIOS-e820: 00000000aad8e000 - 00000000aad94000 (usable)
BIOS-e820: 00000000aad94000 - 00000000aad95000 (reserved)
BIOS-e820: 00000000aad95000 - 00000000aad96000 (usable)
BIOS-e820: 00000000aad96000 - 00000000aadb8000 (reserved)
BIOS-e820: 00000000aadb8000 - 00000000aadc6000 (usable)
BIOS-e820: 00000000aadc6000 - 00000000aade8000 (reserved)
BIOS-e820: 00000000aade8000 - 00000000aae22000 (usable)
BIOS-e820: 00000000aae22000 - 00000000aafe8000 (ACPI NVS)
BIOS-e820: 00000000aafe8000 - 00000000aaffd000 (usable)
BIOS-e820: 00000000aaffd000 - 00000000ab000000 (ACPI data)
BIOS-e820: 00000000ab000000 - 00000000b0000000 (reserved)
BIOS-e820: 00000000e0000000 - 00000000e4000000 (reserved)
BIOS-e820: 00000000fec00000 - 00000000fec01000 (reserved)
BIOS-e820: 00000000fed10000 - 00000000fed14000 (reserved)
BIOS-e820: 00000000fed18000 - 00000000fed1a000 (reserved)
BIOS-e820: 00000000fed1c000 - 00000000fed20000 (reserved)
BIOS-e820: 00000000fee00000 - 00000000fee01000 (reserved)
BIOS-e820: 00000000ff980000 - 00000000ffc00000 (reserved)
BIOS-e820: 00000000ffd80000 - 0000000100000000 (reserved)
BIOS-e820: 0000000100000000 - 000000044f800000 (usable)
DMI 2.6 present.
SMBIOS version 2.6 @ 0xF0460
DMI: ASUSTeK Computer Inc. N55SL/N55SL, BIOS N55SL.201 11/10/2011
AMI BIOS detected: BIOS may corrupt low RAM, working around it.
e820 update range: 0000000000000000 - 0000000000010000 (usable) ==>
(reserved)
e820 update range: 0000000000000000 - 0000000000001000 (usable) ==>
(reserved)
e820 remove range: 00000000000a0000 - 0000000000100000 (usable)
last_pfn = 0x44f800 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 C00000000 write-back
1 base 400000000 mask FC0000000 write-back
2 base 440000000 mask FF0000000 write-back
3 base 0C0000000 mask FC0000000 uncachable
4 base 0B0000000 mask FF0000000 uncachable
5 base 0AC000000 mask FFC000000 uncachable
6 base 0AB000000 mask FFF000000 uncachable
7 base 44F800000 mask FFF800000 uncachable
8 disabled
9 disabled
x86 PAT enabled: cpu 0, old 0x7040600070406, new 0x7010600070106
original variable MTRRs
reg 0, base: 0GB, range: 16GB, type WB
reg 1, base: 16GB, range: 1GB, type WB
reg 2, base: 17GB, range: 256MB, type WB
reg 3, base: 3GB, range: 1GB, type UC
reg 4, base: 2816MB, range: 256MB, type UC
reg 5, base: 2752MB, range: 64MB, type UC
reg 6, base: 2736MB, range: 16MB, type UC
reg 7, base: 17656MB, range: 8MB, type UC
total RAM covered: 16296M
gran_size: 64K chunk_size: 64K num_reg: 10 lose cover RAM: 56M
gran_size: 64K chunk_size: 128K num_reg: 10 lose cover RAM:
56M
gran_size: 64K chunk_size: 256K num_reg: 10 lose cover RAM:
56M
gran_size: 64K chunk_size: 512K num_reg: 10 lose cover RAM:
56M
gran_size: 64K chunk_size: 1M num_reg: 10 lose cover RAM: 56M
gran_size: 64K chunk_size: 2M num_reg: 10 lose cover RAM: 56M
gran_size: 64K chunk_size: 4M num_reg: 10 lose cover RAM: 56M
gran_size: 64K chunk_size: 8M num_reg: 10 lose cover RAM: 56M
gran_size: 64K chunk_size: 16M num_reg: 10 lose cover RAM: 0G
gran_size: 64K chunk_size: 32M num_reg: 10 lose cover RAM: 0G
gran_size: 64K chunk_size: 64M num_reg: 10 lose cover RAM: 0G
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
*BAD*gran_size: 64K chunk_size: 512M num_reg: 10 lose cover
RAM: -256M
*BAD*gran_size: 64K chunk_size: 1G num_reg: 10 lose cover RAM:
-512M
*BAD*gran_size: 64K chunk_size: 2G num_reg: 10 lose cover RAM:
-512M
gran_size: 128K chunk_size: 128K num_reg: 10 lose cover RAM:
56M
gran_size: 128K chunk_size: 256K num_reg: 10 lose cover RAM:
56M
gran_size: 128K chunk_size: 512K num_reg: 10 lose cover RAM:
56M
gran_size: 128K chunk_size: 1M num_reg: 10 lose cover RAM: 56M
gran_size: 128K chunk_size: 2M num_reg: 10 lose cover RAM: 56M
gran_size: 128K chunk_size: 4M num_reg: 10 lose cover RAM: 56M
gran_size: 128K chunk_size: 8M num_reg: 10 lose cover RAM: 56M
gran_size: 128K chunk_size: 16M num_reg: 10 lose cover RAM: 0G
gran_size: 128K chunk_size: 32M num_reg: 10 lose cover RAM: 0G
gran_size: 128K chunk_size: 64M num_reg: 10 lose cover RAM: 0G
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
*BAD*gran_size: 128K chunk_size: 512M num_reg: 10 lose cover
RAM: -256M
*BAD*gran_size: 128K chunk_size: 1G num_reg: 10 lose cover
RAM: -512M
*BAD*gran_size: 128K chunk_size: 2G num_reg: 10 lose cover
RAM: -512M
gran_size: 256K chunk_size: 256K num_reg: 10 lose cover RAM:
56M
gran_size: 256K chunk_size: 512K num_reg: 10 lose cover RAM:
56M
gran_size: 256K chunk_size: 1M num_reg: 10 lose cover RAM: 56M
gran_size: 256K chunk_size: 2M num_reg: 10 lose cover RAM: 56M
gran_size: 256K chunk_size: 4M num_reg: 10 lose cover RAM: 56M
gran_size: 256K chunk_size: 8M num_reg: 10 lose cover RAM: 56M
gran_size: 256K chunk_size: 16M num_reg: 10 lose cover RAM: 0G
gran_size: 256K chunk_size: 32M num_reg: 10 lose cover RAM: 0G
gran_size: 256K chunk_size: 64M num_reg: 10 lose cover RAM: 0G
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
*BAD*gran_size: 256K chunk_size: 512M num_reg: 10 lose cover
RAM: -256M
*BAD*gran_size: 256K chunk_size: 1G num_reg: 10 lose cover
RAM: -512M
*BAD*gran_size: 256K chunk_size: 2G num_reg: 10 lose cover
RAM: -512M
gran_size: 512K chunk_size: 512K num_reg: 10 lose cover RAM:
56M
gran_size: 512K chunk_size: 1M num_reg: 10 lose cover RAM: 56M
gran_size: 512K chunk_size: 2M num_reg: 10 lose cover RAM: 56M
gran_size: 512K chunk_size: 4M num_reg: 10 lose cover RAM: 56M
gran_size: 512K chunk_size: 8M num_reg: 10 lose cover RAM: 56M
gran_size: 512K chunk_size: 16M num_reg: 10 lose cover RAM: 0G
gran_size: 512K chunk_size: 32M num_reg: 10 lose cover RAM: 0G
gran_size: 512K chunk_size: 64M num_reg: 10 lose cover RAM: 0G
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
*BAD*gran_size: 512K chunk_size: 512M num_reg: 10 lose cover
RAM: -256M
*BAD*gran_size: 512K chunk_size: 1G num_reg: 10 lose cover
RAM: -512M
*BAD*gran_size: 512K chunk_size: 2G num_reg: 10 lose cover
RAM: -512M
gran_size: 1M chunk_size: 1M num_reg: 10 lose cover RAM: 56M
gran_size: 1M chunk_size: 2M num_reg: 10 lose cover RAM: 56M
gran_size: 1M chunk_size: 4M num_reg: 10 lose cover RAM: 56M
gran_size: 1M chunk_size: 8M num_reg: 10 lose cover RAM: 56M
gran_size: 1M chunk_size: 16M num_reg: 10 lose cover RAM: 0G
gran_size: 1M chunk_size: 32M num_reg: 10 lose cover RAM: 0G
gran_size: 1M chunk_size: 64M num_reg: 10 lose cover RAM: 0G
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
*BAD*gran_size: 1M chunk_size: 512M num_reg: 10 lose cover
RAM: -256M
*BAD*gran_size: 1M chunk_size: 1G num_reg: 10 lose cover RAM:
-512M
*BAD*gran_size: 1M chunk_size: 2G num_reg: 10 lose cover RAM:
-512M
gran_size: 2M chunk_size: 2M num_reg: 10 lose cover RAM: 56M
gran_size: 2M chunk_size: 4M num_reg: 10 lose cover RAM: 56M
gran_size: 2M chunk_size: 8M num_reg: 10 lose cover RAM: 56M
gran_size: 2M chunk_size: 16M num_reg: 10 lose cover RAM: 0G
gran_size: 2M chunk_size: 32M num_reg: 10 lose cover RAM: 0G
gran_size: 2M chunk_size: 64M num_reg: 10 lose cover RAM: 0G
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
*BAD*gran_size: 2M chunk_size: 512M num_reg: 10 lose cover
RAM: -256M
*BAD*gran_size: 2M chunk_size: 1G num_reg: 10 lose cover RAM:
-512M
*BAD*gran_size: 2M chunk_size: 2G num_reg: 10 lose cover RAM:
-512M
gran_size: 4M chunk_size: 4M num_reg: 10 lose cover RAM: 56M
gran_size: 4M chunk_size: 8M num_reg: 10 lose cover RAM: 56M
gran_size: 4M chunk_size: 16M num_reg: 10 lose cover RAM: 0G
gran_size: 4M chunk_size: 32M num_reg: 10 lose cover RAM: 0G
gran_size: 4M chunk_size: 64M num_reg: 10 lose cover RAM: 0G
gran_size: 4M chunk_size: 128M num_reg: 10 lose cover RAM: 0G
gran_size: 4M chunk_size: 256M num_reg: 10 lose cover RAM: 0G
*BAD*gran_size: 4M chunk_size: 512M num_reg: 10 lose cover
RAM: -256M
*BAD*gran_size: 4M chunk_size: 1G num_reg: 10 lose cover RAM:
-512M
*BAD*gran_size: 4M chunk_size: 2G num_reg: 10 lose cover RAM:
-512M
gran_size: 8M chunk_size: 8M num_reg: 10 lose cover RAM: 56M
gran_size: 8M chunk_size: 16M num_reg: 10 lose cover RAM: 0G
gran_size: 8M chunk_size: 32M num_reg: 10 lose cover RAM: 0G
gran_size: 8M chunk_size: 64M num_reg: 10 lose cover RAM: 0G
gran_size: 8M chunk_size: 128M num_reg: 10 lose cover RAM: 0G
gran_size: 8M chunk_size: 256M num_reg: 10 lose cover RAM: 0G
*BAD*gran_size: 8M chunk_size: 512M num_reg: 10 lose cover
RAM: -256M
*BAD*gran_size: 8M chunk_size: 1G num_reg: 10 lose cover RAM:
-512M
*BAD*gran_size: 8M chunk_size: 2G num_reg: 10 lose cover RAM:
-512M
gran_size: 16M chunk_size: 16M num_reg: 10 lose cover RAM: 56M
gran_size: 16M chunk_size: 32M num_reg: 10 lose cover RAM: 8M
gran_size: 16M chunk_size: 64M num_reg: 10 lose cover RAM: 8M
gran_size: 16M chunk_size: 128M num_reg: 10 lose cover RAM: 8M
gran_size: 16M chunk_size: 256M num_reg: 10 lose cover RAM: 8M
*BAD*gran_size: 16M chunk_size: 512M num_reg: 10 lose cover
RAM: -248M
*BAD*gran_size: 16M chunk_size: 1G num_reg: 10 lose cover RAM:
-504M
*BAD*gran_size: 16M chunk_size: 2G num_reg: 10 lose cover RAM:
-504M
gran_size: 32M chunk_size: 32M num_reg: 10 lose cover RAM: 40M
gran_size: 32M chunk_size: 64M num_reg: 10 lose cover RAM: 40M
gran_size: 32M chunk_size: 128M num_reg: 10 lose cover RAM:
40M
gran_size: 32M chunk_size: 256M num_reg: 10 lose cover RAM:
40M
*BAD*gran_size: 32M chunk_size: 512M num_reg: 10 lose cover
RAM: -216M
*BAD*gran_size: 32M chunk_size: 1G num_reg: 10 lose cover RAM:
-472M
*BAD*gran_size: 32M chunk_size: 2G num_reg: 10 lose cover RAM:
-472M
gran_size: 64M chunk_size: 64M num_reg: 8 lose cover RAM: 104M
gran_size: 64M chunk_size: 128M num_reg: 8 lose cover RAM:
104M
gran_size: 64M chunk_size: 256M num_reg: 9 lose cover RAM:
104M
gran_size: 64M chunk_size: 512M num_reg: 10 lose cover RAM:
104M
gran_size: 64M chunk_size: 1G num_reg: 10 lose cover RAM: 104M
gran_size: 64M chunk_size: 2G num_reg: 10 lose cover RAM: 104M
gran_size: 128M chunk_size: 128M num_reg: 7 lose cover RAM:
168M
gran_size: 128M chunk_size: 256M num_reg: 9 lose cover RAM:
168M
gran_size: 128M chunk_size: 512M num_reg: 10 lose cover RAM:
168M
gran_size: 128M chunk_size: 1G num_reg: 10 lose cover RAM:
168M
gran_size: 128M chunk_size: 2G num_reg: 10 lose cover RAM:
168M
gran_size: 256M chunk_size: 256M num_reg: 5 lose cover RAM:
424M
gran_size: 256M chunk_size: 512M num_reg: 5 lose cover RAM:
424M
gran_size: 256M chunk_size: 1G num_reg: 6 lose cover RAM: 424M
gran_size: 256M chunk_size: 2G num_reg: 7 lose cover RAM: 424M
gran_size: 512M chunk_size: 512M num_reg: 5 lose cover RAM:
424M
gran_size: 512M chunk_size: 1G num_reg: 6 lose cover RAM: 424M
gran_size: 512M chunk_size: 2G num_reg: 7 lose cover RAM: 424M
gran_size: 1G chunk_size: 1G num_reg: 4 lose cover RAM: 936M
gran_size: 1G chunk_size: 2G num_reg: 5 lose cover RAM: 936M
gran_size: 2G chunk_size: 2G num_reg: 3 lose cover RAM: 1960M
mtrr_cleanup: can not find optimal value
please specify mtrr_gran_size/mtrr_chunk_size
e820 update range: 00000000ab000000 - 0000000100000000 (usable) ==>
(reserved)
last_pfn = 0xaaffd max_arch_pfn = 0x400000000
initial memory mapped : 0 - 20000000
init_memory_mapping: 0000000000000000-00000000aaffd000
0000000000 - 00aae00000 page 2M
00aae00000 - 00aaffd000 page 4k
kernel direct mapping tables up to aaffd000 @ 10000-15000
init_memory_mapping: 0000000100000000-000000044f800000
0100000000 - 044f800000 page 2M
kernel direct mapping tables up to 44f800000 @ 13000-26000
My Laptop currently has 16GB of RAM and 8GB of swap as indicated below
$ cat /proc/meminfo
MemTotal: 16235284 kB
MemFree: 15024984 kB
Buffers: 28128 kB
Cached: 412944 kB
SwapCached: 134284 kB
Active: 404240 kB
Inactive: 440124 kB
Active(anon): 224792 kB
Inactive(anon): 230964 kB
Active(file): 179448 kB
Inactive(file): 209160 kB
Unevictable: 0 kB
Mlocked: 0 kB
SwapTotal: 8388600 kB
SwapFree: 7555824 kB
Dirty: 8 kB
Writeback: 0 kB
AnonPages: 291668 kB
Mapped: 45216 kB
Shmem: 52452 kB
Slab: 120600 kB
SReclaimable: 32100 kB
SUnreclaim: 88500 kB
KernelStack: 4344 kB
PageTables: 35824 kB
NFS_Unstable: 0 kB
Bounce: 0 kB
WritebackTmp: 0 kB
CommitLimit: 16506240 kB
Committed_AS: 3714116 kB
VmallocTotal: 34359738367 kB
VmallocUsed: 393260 kB
VmallocChunk: 34359332704 kB
HardwareCorrupted: 0 kB
AnonHugePages: 165888 kB
HugePages_Total: 0
HugePages_Free: 0
HugePages_Rsvd: 0
HugePages_Surp: 0
Hugepagesize: 2048 kB
DirectMap4k: 10228 kB
DirectMap2M: 16676864 kB
$ cat /proc/swaps
Filename Type Size Used Priority
/dev/dm-0 partition 8388600 832688 -1
The laptop is running the latest updates and kernel
$ uname -r
2.6.32-279.11.1.el6.x86_64
I saw that this was a bug from Fedora 14 and CentOS as well, however it
does not appear to be resolved.
https://bugzilla.redhat.com/show_bug.cgi?id=584493
http://bugs.centos.org/view.php?id=5659
At random times my laptop will just lock up and I will have to power cycle
it, I don't know if this is related. I had CentOS 5.8 installed for over a
week and I did not experience this behaviour.
Do I need file this as a new bug or is there a solution for this?
--
Kind Regards
Earl Ramirez
