Kernel extremally slow after upgrade from 4 to 8GB RAM on x86_64 machine, "RCU detected CPU0 stall"
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
linux (Ubuntu) |
Expired
|
Low
|
Unassigned |
Bug Description
Every tty line lasts 20x times slower than on previous config. System is unusable.
WORKAROUND: Now I started it by passing mem=3GB option to kernel in grub.
ProblemType: Bug
DistroRelease: Ubuntu 11.10
Package: linux-image-
ProcVersionSign
Uname: Linux 3.0.0-12-generic x86_64
NonfreeKernelMo
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
ApportVersion: 1.23-0ubuntu3
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/
Card0.Amixer.info:
Card hw:0 'Intel'/'HDA Intel at 0xe3d00000 irq 45'
Mixer name : 'Nvidia MCP77/78 HDMI'
Components : 'HDA:10ec0888,
Controls : 36
Simple ctrls : 20
Date: Sun Oct 16 13:17:55 2011
EcryptfsInUse: Yes
MachineType: Lenovo INVALID
ProcEnviron:
LANGUAGE=pl_PL
LANG=pl_PL.utf8
SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=
RelatedPackageV
linux-
linux-
linux-firmware 1.60
SourcePackage: linux
UpgradeStatus: Upgraded to oneiric on 2011-10-15 (1 days ago)
WpaSupplicantLog:
dmi.bios.date: 06/18/2009
dmi.bios.vendor: Lenovo
dmi.bios.version: 10CN43WW
dmi.board.
dmi.board.name: INVALID
dmi.board.vendor: Lenovo
dmi.board.version: 10CN38WW
dmi.chassis.
dmi.chassis.type: 10
dmi.chassis.vendor: Lenovo
dmi.chassis.
dmi.modalias: dmi:bvnLenovo:
dmi.product.name: INVALID
dmi.product.
dmi.sys.vendor: Lenovo
Changed in linux (Ubuntu): | |
status: | New → Confirmed |
Would it be possible for you to test the latest upstream kernel? It will allow additional upstream developers to examine the issue. Refer to https:/ /wiki.ubuntu. com/KernelMainl ineBuilds . Please test the release candidate kernel versus the daily build. Once you've tested the upstream kernel, please remove the 'needs- upstream- testing' tag. This can be done by clicking on the yellow pencil icon next to the tag located at the bottom of the bug description and deleting the 'needs- upstream- testing' text. Please let us know your results.
Thanks in advance.