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Message #109421
[Bug 1435210] Re: Ubuntu 15.04: Bad MTRR memory management
This problem is 2-3 years old, and it is present in Ubuntu 13.10; 14.04
and 14.10
As suggested, I have just installed the latest 4.0-rc5 kernel. The problem is still here :(
I'm attaching a txt file with the dmesg output using kernel 4.0-rc5.
** Attachment added: "dmesg output with kernel 4.0-rc5"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1435210/+attachment/4353786/+files/dmesg_kernel_4_0rc5.txt
** Tags added: kernel-bug-exists-upstream
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https://bugs.launchpad.net/bugs/1435210
Title:
Ubuntu 15.04: Bad MTRR memory management
Status in linux package in Ubuntu:
Incomplete
Bug description:
Hello,
in order to contribute to quality improvement of the new Ubuntu 15.04, I'm reporting a problem I found in this "beta" version - related to MTRR memory management (mtrr_gran_size/mtrr_chunk_size stuff).
If compared with Manjaro XFCE 0.9.0-pre4 edition (systemd, X.org
server 1.17.1, kernel 1.19.1), it is quite obvious that there's
definitely something wrong with the way how Ubuntu handles 16GB of RAM
(inside BIOS, Intel graphics card is set to 256MB).
Asus optimus notebook N750JVT-4069H (Intel® Core™ i7-4700HQ; RAM 16GB;
Nvidia GeForce GT750M)
Manjaro dmesg output:
[ 0.000000] DMI: ASUSTeK COMPUTER INC. N750JV/N750JV, BIOS N750JV.210 04/11/2014
[ 0.000000] e820: update [mem 0x00000000-0x00000fff] usable ==> reserved
[ 0.000000] e820: remove [mem 0x000a0000-0x000fffff] usable
[ 0.000000] AGP: No AGP bridge found
[ 0.000000] e820: last_pfn = 0x42f200 max_arch_pfn = 0x400000000
[ 0.000000] MTRR default type: uncachable
[ 0.000000] MTRR fixed ranges enabled:
[ 0.000000] 00000-9FFFF write-back
[ 0.000000] A0000-DFFFF uncachable
[ 0.000000] E0000-FFFFF write-protect
[ 0.000000] MTRR variable ranges enabled:
[ 0.000000] 0 base 0000000000 mask 7C00000000 write-back
[ 0.000000] 1 base 0400000000 mask 7FE0000000 write-back
[ 0.000000] 2 base 0420000000 mask 7FF8000000 write-back
[ 0.000000] 3 base 0428000000 mask 7FFC000000 write-back
[ 0.000000] 4 base 042C000000 mask 7FFE000000 write-back
[ 0.000000] 5 base 042E000000 mask 7FFF000000 write-back
[ 0.000000] 6 base 042F000000 mask 7FFFE00000 write-back
[ 0.000000] 7 base 00C0000000 mask 7FC0000000 uncachable
[ 0.000000] 8 base 00BFC00000 mask 7FFFC00000 uncachable
[ 0.000000] 9 disabled
[ 0.000000] PAT configuration [0-7]: WB WC UC- UC WB WC UC- UC
[ 0.000000] e820: update [mem 0xbfc00000-0xffffffff] usable ==> reserved
[ 0.000000] e820: last_pfn = 0xbf000 max_arch_pfn = 0x400000000
[ 0.000000] Scanning 1 areas for low memory corruption
Ubuntu dmesg output:
[ 0.000000] DMI: ASUSTeK COMPUTER INC. N750JV/N750JV, BIOS N750JV.210 04/11/2014
[ 0.000000] e820: update [mem 0x00000000-0x00000fff] usable ==> reserved
[ 0.000000] e820: remove [mem 0x000a0000-0x000fffff] usable
[ 0.000000] AGP: No AGP bridge found
[ 0.000000] e820: last_pfn = 0x42f200 max_arch_pfn = 0x400000000
[ 0.000000] MTRR default type: uncachable
[ 0.000000] MTRR fixed ranges enabled:
[ 0.000000] 00000-9FFFF write-back
[ 0.000000] A0000-DFFFF uncachable
[ 0.000000] E0000-FFFFF write-protect
[ 0.000000] MTRR variable ranges enabled:
[ 0.000000] 0 base 0000000000 mask 7C00000000 write-back
[ 0.000000] 1 base 0400000000 mask 7FE0000000 write-back
[ 0.000000] 2 base 0420000000 mask 7FF8000000 write-back
[ 0.000000] 3 base 0428000000 mask 7FFC000000 write-back
[ 0.000000] 4 base 042C000000 mask 7FFE000000 write-back
[ 0.000000] 5 base 042E000000 mask 7FFF000000 write-back
[ 0.000000] 6 base 042F000000 mask 7FFFE00000 write-back
[ 0.000000] 7 base 00C0000000 mask 7FC0000000 uncachable
[ 0.000000] 8 base 00BFC00000 mask 7FFFC00000 uncachable
[ 0.000000] 9 disabled
[ 0.000000] PAT configuration [0-7]: WB WC UC- UC WB WC UC- UC
[ 0.000000] original variable MTRRs
[ 0.000000] reg 0, base: 0GB, range: 16GB, type WB
[ 0.000000] reg 1, base: 16GB, range: 512MB, type WB
[ 0.000000] reg 2, base: 16896MB, range: 128MB, type WB
[ 0.000000] reg 3, base: 17024MB, range: 64MB, type WB
[ 0.000000] reg 4, base: 17088MB, range: 32MB, type WB
[ 0.000000] reg 5, base: 17120MB, range: 16MB, type WB
[ 0.000000] reg 6, base: 17136MB, range: 2MB, type WB
[ 0.000000] reg 7, base: 3GB, range: 1GB, type UC
[ 0.000000] reg 8, base: 3068MB, range: 4MB, type UC
[ 0.000000] total RAM covered: 16110M
[ 0.000000] gran_size: 64K chunk_size: 64K num_reg: 10 lose cover RAM: 8946M
[ 0.000000] gran_size: 64K chunk_size: 128K num_reg: 10 lose cover RAM: 8946M
[ 0.000000] gran_size: 64K chunk_size: 256K num_reg: 10 lose cover RAM: 8946M
[ 0.000000] gran_size: 64K chunk_size: 512K num_reg: 10 lose cover RAM: 8946M
[ 0.000000] gran_size: 64K chunk_size: 1M num_reg: 10 lose cover RAM: 8946M
[ 0.000000] gran_size: 64K chunk_size: 2M num_reg: 10 lose cover RAM: 8946M
[ 0.000000] gran_size: 64K chunk_size: 4M num_reg: 10 lose cover RAM: 8946M
[ 0.000000] gran_size: 64K chunk_size: 8M num_reg: 10 lose cover RAM: 2M
[ 0.000000] gran_size: 64K chunk_size: 16M num_reg: 10 lose cover RAM: 0G
[ 0.000000] gran_size: 64K chunk_size: 32M num_reg: 10 lose cover RAM: 0G
[ 0.000000] gran_size: 64K chunk_size: 64M num_reg: 10 lose cover RAM: 0G
[ 0.000000] gran_size: 64K chunk_size: 128M num_reg: 10 lose cover RAM: 0G
[ 0.000000] gran_size: 64K chunk_size: 256M num_reg: 10 lose cover RAM: 0G
[ 0.000000] gran_size: 64K chunk_size: 512M num_reg: 10 lose cover RAM: 0G
[ 0.000000] gran_size: 64K chunk_size: 1G num_reg: 10 lose cover RAM: 0G
[ 0.000000] *BAD*gran_size: 64K chunk_size: 2G num_reg: 10 lose cover RAM: -1G
[ 0.000000] gran_size: 128K chunk_size: 128K num_reg: 10 lose cover RAM: 8946M
[ 0.000000] gran_size: 128K chunk_size: 256K num_reg: 10 lose cover RAM: 8946M
[ 0.000000] gran_size: 128K chunk_size: 512K num_reg: 10 lose cover RAM: 8946M
[ 0.000000] gran_size: 128K chunk_size: 1M num_reg: 10 lose cover RAM: 8946M
[ 0.000000] gran_size: 128K chunk_size: 2M num_reg: 10 lose cover RAM: 8946M
[ 0.000000] gran_size: 128K chunk_size: 4M num_reg: 10 lose cover RAM: 8946M
[ 0.000000] gran_size: 128K chunk_size: 8M num_reg: 10 lose cover RAM: 2M
[ 0.000000] gran_size: 128K chunk_size: 16M num_reg: 10 lose cover RAM: 0G
[ 0.000000] gran_size: 128K chunk_size: 32M num_reg: 10 lose cover RAM: 0G
[ 0.000000] gran_size: 128K chunk_size: 64M num_reg: 10 lose cover RAM: 0G
[ 0.000000] gran_size: 128K chunk_size: 128M num_reg: 10 lose cover RAM: 0G
[ 0.000000] gran_size: 128K chunk_size: 256M num_reg: 10 lose cover RAM: 0G
[ 0.000000] gran_size: 128K chunk_size: 512M num_reg: 10 lose cover RAM: 0G
[ 0.000000] gran_size: 128K chunk_size: 1G num_reg: 10 lose cover RAM: 0G
[ 0.000000] *BAD*gran_size: 128K chunk_size: 2G num_reg: 10 lose cover RAM: -1G
[ 0.000000] gran_size: 256K chunk_size: 256K num_reg: 10 lose cover RAM: 8946M
[ 0.000000] gran_size: 256K chunk_size: 512K num_reg: 10 lose cover RAM: 8946M
[ 0.000000] gran_size: 256K chunk_size: 1M num_reg: 10 lose cover RAM: 8946M
[ 0.000000] gran_size: 256K chunk_size: 2M num_reg: 10 lose cover RAM: 8946M
[ 0.000000] gran_size: 256K chunk_size: 4M num_reg: 10 lose cover RAM: 8946M
[ 0.000000] gran_size: 256K chunk_size: 8M num_reg: 10 lose cover RAM: 2M
[ 0.000000] gran_size: 256K chunk_size: 16M num_reg: 10 lose cover RAM: 0G
[ 0.000000] gran_size: 256K chunk_size: 32M num_reg: 10 lose cover RAM: 0G
[ 0.000000] gran_size: 256K chunk_size: 64M num_reg: 10 lose cover RAM: 0G
[ 0.000000] gran_size: 256K chunk_size: 128M num_reg: 10 lose cover RAM: 0G
[ 0.000000] gran_size: 256K chunk_size: 256M num_reg: 10 lose cover RAM: 0G
[ 0.000000] gran_size: 256K chunk_size: 512M num_reg: 10 lose cover RAM: 0G
[ 0.000000] gran_size: 256K chunk_size: 1G num_reg: 10 lose cover RAM: 0G
[ 0.000000] *BAD*gran_size: 256K chunk_size: 2G num_reg: 10 lose cover RAM: -1G
[ 0.000000] gran_size: 512K chunk_size: 512K num_reg: 10 lose cover RAM: 8946M
[ 0.000000] gran_size: 512K chunk_size: 1M num_reg: 10 lose cover RAM: 8946M
[ 0.000000] gran_size: 512K chunk_size: 2M num_reg: 10 lose cover RAM: 8946M
[ 0.000000] gran_size: 512K chunk_size: 4M num_reg: 10 lose cover RAM: 8946M
[ 0.000000] gran_size: 512K chunk_size: 8M num_reg: 10 lose cover RAM: 2M
[ 0.000000] gran_size: 512K chunk_size: 16M num_reg: 10 lose cover RAM: 0G
[ 0.000000] gran_size: 512K chunk_size: 32M num_reg: 10 lose cover RAM: 0G
[ 0.000000] gran_size: 512K chunk_size: 64M num_reg: 10 lose cover RAM: 0G
[ 0.000000] gran_size: 512K chunk_size: 128M num_reg: 10 lose cover RAM: 0G
[ 0.000000] gran_size: 512K chunk_size: 256M num_reg: 10 lose cover RAM: 0G
[ 0.000000] gran_size: 512K chunk_size: 512M num_reg: 10 lose cover RAM: 0G
[ 0.000000] gran_size: 512K chunk_size: 1G num_reg: 10 lose cover RAM: 0G
[ 0.000000] *BAD*gran_size: 512K chunk_size: 2G num_reg: 10 lose cover RAM: -1G
[ 0.000000] gran_size: 1M chunk_size: 1M num_reg: 10 lose cover RAM: 8946M
[ 0.000000] gran_size: 1M chunk_size: 2M num_reg: 10 lose cover RAM: 8946M
[ 0.000000] gran_size: 1M chunk_size: 4M num_reg: 10 lose cover RAM: 8946M
[ 0.000000] gran_size: 1M chunk_size: 8M num_reg: 10 lose cover RAM: 2M
[ 0.000000] gran_size: 1M chunk_size: 16M num_reg: 10 lose cover RAM: 0G
[ 0.000000] gran_size: 1M chunk_size: 32M num_reg: 10 lose cover RAM: 0G
[ 0.000000] gran_size: 1M chunk_size: 64M num_reg: 10 lose cover RAM: 0G
[ 0.000000] gran_size: 1M chunk_size: 128M num_reg: 10 lose cover RAM: 0G
[ 0.000000] gran_size: 1M chunk_size: 256M num_reg: 10 lose cover RAM: 0G
[ 0.000000] gran_size: 1M chunk_size: 512M num_reg: 10 lose cover RAM: 0G
[ 0.000000] gran_size: 1M chunk_size: 1G num_reg: 10 lose cover RAM: 0G
[ 0.000000] *BAD*gran_size: 1M chunk_size: 2G num_reg: 10 lose cover RAM: -1G
[ 0.000000] gran_size: 2M chunk_size: 2M num_reg: 10 lose cover RAM: 8946M
[ 0.000000] gran_size: 2M chunk_size: 4M num_reg: 10 lose cover RAM: 8946M
[ 0.000000] gran_size: 2M chunk_size: 8M num_reg: 10 lose cover RAM: 2M
[ 0.000000] gran_size: 2M chunk_size: 16M num_reg: 10 lose cover RAM: 0G
[ 0.000000] gran_size: 2M chunk_size: 32M num_reg: 10 lose cover RAM: 0G
[ 0.000000] gran_size: 2M chunk_size: 64M num_reg: 10 lose cover RAM: 0G
[ 0.000000] gran_size: 2M chunk_size: 128M num_reg: 10 lose cover RAM: 0G
[ 0.000000] gran_size: 2M chunk_size: 256M num_reg: 10 lose cover RAM: 0G
[ 0.000000] gran_size: 2M chunk_size: 512M num_reg: 10 lose cover RAM: 0G
[ 0.000000] gran_size: 2M chunk_size: 1G num_reg: 10 lose cover RAM: 0G
[ 0.000000] *BAD*gran_size: 2M chunk_size: 2G num_reg: 10 lose cover RAM: -1G
[ 0.000000] gran_size: 4M chunk_size: 4M num_reg: 10 lose cover RAM: 8946M
[ 0.000000] gran_size: 4M chunk_size: 8M num_reg: 10 lose cover RAM: 2M
[ 0.000000] gran_size: 4M chunk_size: 16M num_reg: 10 lose cover RAM: 2M
[ 0.000000] gran_size: 4M chunk_size: 32M num_reg: 8 lose cover RAM: 2M
[ 0.000000] gran_size: 4M chunk_size: 64M num_reg: 8 lose cover RAM: 2M
[ 0.000000] gran_size: 4M chunk_size: 128M num_reg: 8 lose cover RAM: 2M
[ 0.000000] gran_size: 4M chunk_size: 256M num_reg: 8 lose cover RAM: 2M
[ 0.000000] gran_size: 4M chunk_size: 512M num_reg: 8 lose cover RAM: 2M
[ 0.000000] gran_size: 4M chunk_size: 1G num_reg: 8 lose cover RAM: 2M
[ 0.000000] gran_size: 4M chunk_size: 2G num_reg: 9 lose cover RAM: 2M
[ 0.000000] gran_size: 8M chunk_size: 8M num_reg: 10 lose cover RAM: 758M
[ 0.000000] gran_size: 8M chunk_size: 16M num_reg: 10 lose cover RAM: 6M
[ 0.000000] gran_size: 8M chunk_size: 32M num_reg: 8 lose cover RAM: 6M
[ 0.000000] gran_size: 8M chunk_size: 64M num_reg: 8 lose cover RAM: 6M
[ 0.000000] gran_size: 8M chunk_size: 128M num_reg: 8 lose cover RAM: 6M
[ 0.000000] gran_size: 8M chunk_size: 256M num_reg: 8 lose cover RAM: 6M
[ 0.000000] gran_size: 8M chunk_size: 512M num_reg: 8 lose cover RAM: 6M
[ 0.000000] gran_size: 8M chunk_size: 1G num_reg: 8 lose cover RAM: 6M
[ 0.000000] gran_size: 8M chunk_size: 2G num_reg: 9 lose cover RAM: 6M
[ 0.000000] gran_size: 16M chunk_size: 16M num_reg: 10 lose cover RAM: 254M
[ 0.000000] gran_size: 16M chunk_size: 32M num_reg: 8 lose cover RAM: 14M
[ 0.000000] gran_size: 16M chunk_size: 64M num_reg: 8 lose cover RAM: 14M
[ 0.000000] gran_size: 16M chunk_size: 128M num_reg: 8 lose cover RAM: 14M
[ 0.000000] gran_size: 16M chunk_size: 256M num_reg: 8 lose cover RAM: 14M
[ 0.000000] gran_size: 16M chunk_size: 512M num_reg: 8 lose cover RAM: 14M
[ 0.000000] gran_size: 16M chunk_size: 1G num_reg: 8 lose cover RAM: 14M
[ 0.000000] gran_size: 16M chunk_size: 2G num_reg: 9 lose cover RAM: 14M
[ 0.000000] gran_size: 32M chunk_size: 32M num_reg: 10 lose cover RAM: 142M
[ 0.000000] gran_size: 32M chunk_size: 64M num_reg: 8 lose cover RAM: 46M
[ 0.000000] gran_size: 32M chunk_size: 128M num_reg: 8 lose cover RAM: 46M
[ 0.000000] gran_size: 32M chunk_size: 256M num_reg: 8 lose cover RAM: 46M
[ 0.000000] gran_size: 32M chunk_size: 512M num_reg: 8 lose cover RAM: 46M
[ 0.000000] gran_size: 32M chunk_size: 1G num_reg: 8 lose cover RAM: 46M
[ 0.000000] gran_size: 32M chunk_size: 2G num_reg: 9 lose cover RAM: 46M
[ 0.000000] gran_size: 64M chunk_size: 64M num_reg: 10 lose cover RAM: 110M
[ 0.000000] gran_size: 64M chunk_size: 128M num_reg: 8 lose cover RAM: 110M
[ 0.000000] gran_size: 64M chunk_size: 256M num_reg: 8 lose cover RAM: 110M
[ 0.000000] gran_size: 64M chunk_size: 512M num_reg: 8 lose cover RAM: 110M
[ 0.000000] gran_size: 64M chunk_size: 1G num_reg: 8 lose cover RAM: 110M
[ 0.000000] gran_size: 64M chunk_size: 2G num_reg: 9 lose cover RAM: 110M
[ 0.000000] gran_size: 128M chunk_size: 128M num_reg: 8 lose cover RAM: 238M
[ 0.000000] gran_size: 128M chunk_size: 256M num_reg: 8 lose cover RAM: 238M
[ 0.000000] gran_size: 128M chunk_size: 512M num_reg: 8 lose cover RAM: 238M
[ 0.000000] gran_size: 128M chunk_size: 1G num_reg: 8 lose cover RAM: 238M
[ 0.000000] gran_size: 128M chunk_size: 2G num_reg: 9 lose cover RAM: 238M
[ 0.000000] gran_size: 256M chunk_size: 256M num_reg: 6 lose cover RAM: 494M
[ 0.000000] gran_size: 256M chunk_size: 512M num_reg: 6 lose cover RAM: 494M
[ 0.000000] gran_size: 256M chunk_size: 1G num_reg: 7 lose cover RAM: 494M
[ 0.000000] gran_size: 256M chunk_size: 2G num_reg: 8 lose cover RAM: 494M
[ 0.000000] gran_size: 512M chunk_size: 512M num_reg: 5 lose cover RAM: 750M
[ 0.000000] gran_size: 512M chunk_size: 1G num_reg: 7 lose cover RAM: 750M
[ 0.000000] gran_size: 512M chunk_size: 2G num_reg: 8 lose cover RAM: 750M
[ 0.000000] gran_size: 1G chunk_size: 1G num_reg: 3 lose cover RAM: 1774M
[ 0.000000] gran_size: 1G chunk_size: 2G num_reg: 3 lose cover RAM: 1774M
[ 0.000000] gran_size: 2G chunk_size: 2G num_reg: 3 lose cover RAM: 1774M
[ 0.000000] mtrr_cleanup: can not find optimal value
[ 0.000000] please specify mtrr_gran_size/mtrr_chunk_size
[ 0.000000] e820: update [mem 0xbfc00000-0xffffffff] usable ==> reserved
[ 0.000000] e820: last_pfn = 0xbf000 max_arch_pfn = 0x400000000
[ 0.000000] Scanning 1 areas for low memory corruption
ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: linux-image-3.19.0-9-generic 3.19.0-9.9 [modified: boot/vmlinuz-3.19.0-9-generic]
ProcVersionSignature: Ubuntu 3.19.0-9.9-generic 3.19.1
Uname: Linux 3.19.0-9-generic x86_64
ApportVersion: 2.16.2-0ubuntu4
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC1: aljosa 1824 F.... pulseaudio
/dev/snd/controlC0: aljosa 1824 F.... pulseaudio
CurrentDesktop: Unity
Date: Mon Mar 23 09:52:24 2015
HibernationDevice: RESUME=UUID=df42f272-c519-4323-977d-bb1fe697e7f0
InstallationDate: Installed on 2015-03-19 (3 days ago)
InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Alpha amd64 (20150318)
MachineType: ASUSTeK COMPUTER INC. N750JV
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.19.0-9-generic.efi.signed root=UUID=da571e57-f1af-49b1-95ba-206e95c86cec ro quiet splash ipv6.disable=1 vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-3.19.0-9-generic N/A
linux-backports-modules-3.19.0-9-generic N/A
linux-firmware 1.143
SourcePackage: linux
UdevLog: Error: [Errno 2] No such file or directory: '/var/log/udev'
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 04/11/2014
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: N750JV.210
dmi.board.asset.tag: ATN12345678901234567
dmi.board.name: N750JV
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: 1.0
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: ASUSTeK COMPUTER INC.
dmi.chassis.version: 1.0
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrN750JV.210:bd04/11/2014:svnASUSTeKCOMPUTERINC.:pnN750JV:pvr1.0:rvnASUSTeKCOMPUTERINC.:rnN750JV:rvr1.0:cvnASUSTeKCOMPUTERINC.:ct10:cvr1.0:
dmi.product.name: N750JV
dmi.product.version: 1.0
dmi.sys.vendor: ASUSTeK COMPUTER INC.
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References
