[Bug 662946] [NEW] linux kernel 2.6.35 slows down the whole system because of kslowdxxx processes

[Vincenzo Ampolo]

Public bug reported:

I'm running maverick with kernel:

Linux earth 2.6.35-22-generic #34-Ubuntu SMP Sun Oct 10 09:26:05 UTC
2010 x86_64 GNU/Linux

I've just the browser opened, top says that my cpu is used a 1-3% and my
system load is almost 9.60. There is a kslowd001 or kslowd002 or
kslowd003 which appears in the top screen and it seems the issue which
makes the system load so high.

The problem is already known and has been reported in many other bug
reports such as:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/595764

The solution is to switch to a 2.6.36 release where this issue has been
resolved. Please provide a 2.6.36 with the ubuntu patches to fix the
problem.

Thanks

ProblemType: Bug
DistroRelease: Ubuntu 10.10
Package: linux-image-2.6.35-22-generic 2.6.35-22.34
Regression: Yes
Reproducible: Yes
ProcVersionSignature: Ubuntu 2.6.35-22.34-generic 2.6.35.4
Uname: Linux 2.6.35-22-generic x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
Architecture: amd64
ArecordDevices:
 **** List of CAPTURE Hardware Devices ****
 card 0: Intel [HDA Intel], device 0: ALC262 Analog [ALC262 Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC0:  goshawk    1978 F.... pulseaudio
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0xd5200000 irq 49'
   Mixer name	: 'Realtek ALC262'
   Components	: 'HDA:10ec0262,104d2d00,00100302 HDA:14f12c06,104d1700,00100000'
   Controls      : 12
   Simple ctrls  : 8
Card1.Amixer.info:
 Card hw:1 'HDMI'/'HDA ATI HDMI at 0xd0030000 irq 50'
   Mixer name	: 'ATI R6xx HDMI'
   Components	: 'HDA:1002aa01,104d2d00,00100000'
   Controls      : 4
   Simple ctrls  : 1
Card1.Amixer.values:
 Simple mixer control 'IEC958',0
   Capabilities: pswitch pswitch-joined penum
   Playback channels: Mono
   Mono: Playback [on]
Date: Mon Oct 18 22:52:37 2010
EcryptfsInUse: Yes
HibernationDevice: RESUME=UUID=d40958ac-8cf8-4eb9-b97e-b77c74d2d032
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release amd64 (20101007)
MachineType: Sony Corporation VGN-SR21M_S
ProcCmdLine: BOOT_IMAGE=/vmlinuz-2.6.35-22-generic root=/dev/sda6 ro quiet splash
ProcEnviron:
 LANG=en_US.utf8
 SHELL=/bin/bash
RelatedPackageVersions: linux-firmware 1.38
SourcePackage: linux
dmi.bios.date: 08/14/2008
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: R1110Y1
dmi.board.asset.tag: N/A
dmi.board.name: VAIO
dmi.board.vendor: Sony Corporation
dmi.board.version: N/A
dmi.chassis.asset.tag: N/A
dmi.chassis.type: 10
dmi.chassis.vendor: Sony Corporation
dmi.chassis.version: N/A
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrR1110Y1:bd08/14/2008:svnSonyCorporation:pnVGN-SR21M_S:pvrC600TTSE:rvnSonyCorporation:rnVAIO:rvrN/A:cvnSonyCorporation:ct10:cvrN/A:
dmi.product.name: VGN-SR21M_S
dmi.product.version: C600TTSE
dmi.sys.vendor: Sony Corporation

** Affects: linux
     Importance: Unknown
         Status: Unknown

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug kernel-config maverick needs-upstream-testing regression-release

-- 
linux kernel 2.6.35 slows down the whole system because of kslowdxxx processes
https://bugs.launchpad.net/bugs/662946
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