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Bug 87767 - kupdated takes 100%cpu
Summary: kupdated takes 100%cpu
Alias: None
Product: Red Hat Linux
Classification: Retired
Component: kernel
Version: 9
Hardware: i686
OS: Linux
Target Milestone: ---
Assignee: Arjan van de Ven
QA Contact: Brian Brock
Depends On:
TreeView+ depends on / blocked
Reported: 2003-04-02 08:44 UTC by Mark van Rossum
Modified: 2007-04-18 16:52 UTC (History)
0 users

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Last Closed: 2003-04-02 21:03:50 UTC

Attachments (Terms of Use)

Description Mark van Rossum 2003-04-02 08:44:16 UTC
From Bugzilla Helper:
User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.0.1) Gecko/20021003

Description of problem:
In RH 9.0 kupdated takes 100% CPU time even without any load on the system.

This is RH9 upgraded from 8.0

Version-Release number of selected component (if applicable):

How reproducible:

Steps to Reproduce:
1.just boot and do top


Additional info:

Some googling suggests something wrong with the IDE driver.

THis is on a ibm t21 laptop with a pretty regular IDE drive.

I was not able to figure it out yet.

Comment 1 Alan Cox 2003-04-02 14:14:36 UTC
T21 is standard PIIX4 IDE, its as generic as it gets so I find that unlikely.
Please give specific details on why you think that. 

Comment 2 Mark van Rossum 2003-04-02 14:19:21 UTC
This bug does not seem to involve an unsupported IDE chipset reported
in older newsgroup messages,
as hdparm -t /dev/hda 
returns normal values.

Quick fix: 
Go back to older kernel
rpm -ivh --oldpackage kernel-2.4.18-27.8.0.i686.rpm

Comment 3 Mark van Rossum 2003-04-02 14:28:10 UTC
More info:
- nothing on this in /var/log/messages
- hda uses DMA mode

Things that did not help:
- removing CDROM drive
- rmmod lvm-mod
- /etc/rc.d/init.d/noflushd stop 
(This is a program to disable frequent flushes on laptops)

 Model=IBM-DJSA-232, FwRev=JS8IAD2A, SerialNo=48YBWLG7103
 Config={ HardSect NotMFM HdSw>15uSec Fixed DTR>10Mbs }
 RawCHS=16383/15/63, TrkSize=0, SectSize=0, ECCbytes=4
 BuffType=DualPortCache, BuffSize=1874kB, MaxMultSect=16, MultSect=16
 CurCHS=16383/15/63, CurSects=15481935, LBA=yes, LBAsects=62506080
 IORDY=on/off, tPIO={min:240,w/IORDY:120}, tDMA={min:120,rec:120}
 PIO modes:  pio0 pio1 pio2 pio3 pio4
 DMA modes:  mdma0 mdma1 mdma2
 UDMA modes: udma0 udma1 *udma2 udma3 udma4
 AdvancedPM=yes: mode=0x9F (159) WriteCache=enabled
 Drive conforms to: ATA/ATAPI-5 T13 1321D revision 1:  2 3 4 5

00:00.0 Host bridge: Intel Corp. 440BX/ZX/DX - 82443BX/ZX/DX Host bridge 
(rev 03)
00:01.0 PCI bridge: Intel Corp. 440BX/ZX/DX - 82443BX/ZX/DX AGP bridge 
(rev 03)
00:02.0 CardBus bridge: Texas Instruments PCI1450 (rev 03)
00:02.1 CardBus bridge: Texas Instruments PCI1450 (rev 03)
00:03.0 Ethernet controller: 3Com Corporation 3c556B Hurricane CardBus 
(rev 20)
00:03.1 Communication controller: 3Com Corporation Mini PCI 56k Winmodem 
(rev 20)
00:05.0 Multimedia audio controller: Cirrus Logic CS 4614/22/24 
[CrystalClear SoundFusion Audio Accelerator] (rev 01)
00:07.0 Bridge: Intel Corp. 82371AB/EB/MB PIIX4 ISA (rev 02)
00:07.1 IDE interface: Intel Corp. 82371AB/EB/MB PIIX4 IDE (rev 01)
00:07.2 USB Controller: Intel Corp. 82371AB/EB/MB PIIX4 USB (rev 01)
00:07.3 Bridge: Intel Corp. 82371AB/EB/MB PIIX4 ACPI (rev 03)
01:00.0 VGA compatible controller: S3 Inc. 86C270-294 Savage/IX-MV (rev 

Comment 4 Mark van Rossum 2003-04-02 21:03:50 UTC
After some more changes and reboot, the behaviour is now normal.

I'm not sure what did the trick:
- removed 'powertweak' from system
- removed oprofile package
- removed 'noflushd' from system

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