Kernel extremally slow after upgrade from 4 to 8GB RAM on x86_64 machine, "RCU detected CPU0 stall"

[Bartłomiej Żogała]

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-3.0.0-12-generic 3.0.0-12.20
ProcVersionSignature: Ubuntu 3.0.0-12.20-generic 3.0.4
Uname: Linux 3.0.0-12-generic x86_64
NonfreeKernelModules: nvidia
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
ApportVersion: 1.23-0ubuntu3
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: nusch 6342 F.... pulseaudio
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0xe3d00000 irq 45'
   Mixer name : 'Nvidia MCP77/78 HDMI'
   Components : 'HDA:10ec0888,17aa3d78,00100202 HDA:10573055,17aa3d7d,00100700 HDA:10de0006,10de0101,00100000'
   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=/vmlinuz-3.0.0-12-generic root=UUID=4fa8b5a2-df36-44bd-9e2b-0e4982840edf ro nomodeset crashkernel=384M-2G:64M,2G-:128M mem=3G vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-3.0.0-12-generic N/A
 linux-backports-modules-3.0.0-12-generic N/A
 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.asset.tag: Lenovo Assert TAG
dmi.board.name: INVALID
dmi.board.vendor: Lenovo
dmi.board.version: 10CN38WW
dmi.chassis.asset.tag: Lenovo Assert TAG
dmi.chassis.type: 10
dmi.chassis.vendor: Lenovo
dmi.chassis.version: 10CN43WW
dmi.modalias: dmi:bvnLenovo:bvr10CN43WW:bd06/18/2009:svnLenovo:pnINVALID:pvrLenovoIdeaPadY530:rvnLenovo:rnINVALID:rvr10CN38WW:cvnLenovo:ct10:cvr10CN43WW:
dmi.product.name: INVALID
dmi.product.version: Lenovo IdeaPad Y530
dmi.sys.vendor: Lenovo

[Joseph Salisbury (jsalisbury)]

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/KernelMainlineBuilds . 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.

[penalvch (penalvch)]

Bartłomiej Żogała, this bug was reported a while ago and there hasn't been any activity in it recently. We were wondering if this is still an issue? If so, could you please test for this with the latest development release of Ubuntu? ISO CD images are available from http://cdimage.ubuntu.com/releases/ .

If it remains an issue, could you please run the following command in the development release from a Terminal (Applications->Accessories->Terminal), as it will automatically gather and attach updated debug information to this report:

apport-collect -p linux <replace-with-bug-number>

Also, could you please test the latest upstream kernel available? It will allow additional upstream developers to examine the issue. Refer to https://wiki.ubuntu.com/KernelMainlineBuilds . Please do not test the kernel in the daily folder, but the one all the way at the bottom. 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. As well, please comment on which kernel version specifically you tested.

If this bug is fixed in the mainline kernel, please add the following tag 'kernel-fixed-upstream'.

If the mainline kernel does not fix this bug, please add the tag: 'kernel-bug-exists-upstream'.

If you are unable to test the mainline kernel, for example it will not boot, please add the tag: 'kernel-unable-to-test-upstream', and comment as to why specifically you were unable to test it.

Please let us know your results. Thanks in advance.

Helpful Bug Reporting Links:
https://help.ubuntu.com/community/ReportingBugs#Bug_Reporting_Etiquette
https://help.ubuntu.com/community/ReportingBugs#A3._Make_sure_the_bug_hasn.27t_already_been_reported
https://help.ubuntu.com/community/ReportingBugs#Adding_Apport_Debug_Information_to_an_Existing_Launchpad_Bug
https://help.ubuntu.com/community/ReportingBugs#Adding_Additional_Attachments_to_an_Existing_Launchpad_Bug

[Bartłomiej Żogała (nusch)]

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16 paź 2011 13:40, "Bartłomiej Żogała" <email address hidden>
napisał(a):

> Public bug reported:
>
> Every tty line lasts 20x times slower than on previous config. System is
> unusable. Now I started it by passing mem=3GB option to kernel in grub.
>
> ProblemType: Bug
> DistroRelease: Ubuntu 11.10
> Package: linux-image-3.0.0-12-generic 3.0.0-12.20
> ProcVersionSignature: Ubuntu 3.0.0-12.20-generic 3.0.4
> Uname: Linux 3.0.0-12-generic x86_64
> NonfreeKernelModules: nvidia
> AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
> ApportVersion: 1.23-0ubuntu3
> Architecture: amd64
> AudioDevicesInUse:
> USER PID ACCESS COMMAND
> /dev/snd/controlC0: nusch 6342 F.... pulseaudio
> Card0.Amixer.info:
> Card hw:0 'Intel'/'HDA Intel at 0xe3d00000 irq 45'
> Mixer name : 'Nvidia MCP77/78 HDMI'
> Components : 'HDA:10ec0888,17aa3d78,00100202
> HDA:10573055,17aa3d7d,00100700 HDA:10de0006,10de0101,00100000'
> 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=/vmlinuz-3.0.0-12-generic
> root=UUID=4fa8b5a2-df36-44bd-9e2b-0e4982840edf ro nomodeset
> crashkernel=384M-2G:64M,2G-:128M mem=3G vt.handoff=7
> RelatedPackageVersions:
> linux-restricted-modules-3.0.0-12-generic N/A
> linux-backports-modules-3.0.0-12-generic N/A
> 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.asset.tag: Lenovo Assert TAG
> dmi.board.name: INVALID
> dmi.board.vendor: Lenovo
> dmi.board.version: 10CN38WW
> dmi.chassis.asset.tag: Lenovo Assert TAG
> dmi.chassis.type: 10
> dmi.chassis.vendor: Lenovo
> dmi.chassis.version: 10CN43WW
> dmi.modalias:
> dmi:bvnLenovo:bvr10CN43WW:bd06/18/2009:svnLenovo:pnINVALID:pvrLenovoIdeaPadY530:rvnLenovo:rnINVALID:rvr10CN38WW:cvnLenovo:ct10:cvr10CN43WW:
> dmi.product.name: INVALID
> dmi.product.version: Lenovo IdeaPad Y530
> dmi.sys.vendor: Lenovo
>
> ** Affects: linux (Ubuntu)
> Importance: Undecided
> Status: New
>
>
> ** Tags: amd64 apport-bug oneiric
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/875655
>
> Title:
> Kernel extremally slow after upgrade from 4 to 8GB RAM on x86_64
> machine, "RCU detected CPU0 stall"
>
> To manage notifications about this bug go to:
> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/875655/+subscriptions
>

[Launchpad Janitor (janitor)]

[Expired for linux (Ubuntu) because there has been no activity for 60 days.]