Public bug reported:
ksoftirqd (ksoftirqd/1) is using 50% CPU or above when idle.
As others have already found out this is a bug with a module for a tv-tuner
card. But I don't have such a card, and no such module is loaded.
System info: Ubuntu 7.10
$ uname -a
Linux bob-laptop 2.6.22-14-generic #1 SMP Tue Dec 18 08:02:57 UTC 2007 i686
GNU/Linux
----------------------
$ top
top - 10:39:01 up 24 min, 4 users, load average: 1.02, 1.57, 1.25
Tasks: 129 total, 3 running, 126 sleeping, 0 stopped, 0 zombie
Cpu(s): 0.3%us, 0.0%sy, 0.0%ni, 46.8%id, 0.0%wa, 25.8%hi, 27.1%si, 0.0%st
Mem: 2075360k total, 1055600k used, 1019760k free, 24936k buffers
Swap: 2000084k total, 0k used, 2000084k free, 465784k cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
7 root 35 19 0 0 0 R 80 0.0 15:07.14 ksoftirqd/1
6013 root 15 0 873m 46m 8040 S 2 2.3 2:25.68 Xorg
6514 bob 16 0 44912 11m 9608 S 1 0.6 0:02.33 nm-applet
5448 mysql 15 0 124m 16m 4468 S 1 0.8 0:02.42 mysqld
6481 bob 15 0 87180 41m 17m S 0 2.1 0:26.95 compiz.real
6574 bob 15 0 242m 81m 23m R 0 4.0 3:04.18 firefox-bin
1 root 18 0 2948 1852 532 S 0 0.1 0:01.29 init
2 root 10 -5 0 0 0 S 0 0.0 0:00.00 kthreadd
3 root RT -5 0 0 0 S 0 0.0 0:00.00 migration/0
4 root 34 19 0 0 0 S 0 0.0 0:00.61 ksoftirqd/0
----------------------
$ cat /proc/cpuinfo
processor : 0
vendor_id : AuthenticAMD
cpu family : 15
model : 104
model name : AMD Turion(tm) 64 X2 Mobile Technology TL-58
stepping : 1
cpu MHz : 1900.000
cache size : 512 KB
physical id : 0
siblings : 2
core id : 0
cpu cores : 2
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 1
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov
pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt rdtscp lm
3dnowext 3dnow pni cx16 lahf_lm cmp_legacy svm extapic cr8legacy 3dnowprefetch
ts fid vid ttp tm stc 100mhzsteps
bogomips : 3821.15
clflush size : 64
processor : 1
vendor_id : AuthenticAMD
cpu family : 15
model : 104
model name : AMD Turion(tm) 64 X2 Mobile Technology TL-58
stepping : 1
cpu MHz : 1900.000
cache size : 512 KB
physical id : 0
siblings : 2
core id : 1
cpu cores : 2
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 1
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov
pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt rdtscp lm
3dnowext 3dnow pni cx16 lahf_lm cmp_legacy svm extapic cr8legacy 3dnowprefetch
ts fid vid ttp tm stc 100mhzsteps
bogomips : 3821.15
clflush size : 64
----------------------
$ cat /proc/interrupts
CPU0 CPU1
0: 344633 56518 IO-APIC-edge timer
1: 1 11 IO-APIC-edge i8042
5: 0 2 IO-APIC-fasteoi ohci1394
7: 1 0 IO-APIC-fasteoi sdhci:slot0
8: 0 19 IO-APIC-edge rtc
9: 546 327 IO-APIC-fasteoi acpi
12: 3 120 IO-APIC-edge i8042
14: 12529 1786 IO-APIC-edge ide0
16: 0 33 IO-APIC-fasteoi ehci_hcd:usb1
17: 9483 10481 IO-APIC-fasteoi ahci
18: 139998 23392 IO-APIC-fasteoi eth0
19: 279499 49594 IO-APIC-fasteoi ohci_hcd:usb2
20: 163559 25038 IO-APIC-fasteoi nvidia
21: 113556 91832347 IO-APIC-fasteoi bcm43xx
22: 34 431 IO-APIC-fasteoi HDA Intel
NMI: 0 0
LOC: 56397 344037
ERR: 1
MIS: 0
----------------------
$ lsmod
Module Size Used by
ipv6 273892 23
af_packet 24840 2
rfcomm 42136 2
l2cap 26240 11 rfcomm
ppdev 10244 0
powernow_k8 16960 1
cpufreq_conservative 8072 0
cpufreq_stats 7232 0
cpufreq_userspace 5280 0
cpufreq_ondemand 9612 0
freq_table 5792 3 powernow_k8,cpufreq_stats,cpufreq_ondemand
cpufreq_powersave 2688 0
sbs 19592 0
button 8976 0
video 18060 11
dock 10656 0
ac 6148 0
battery 11012 0
container 5504 0
sbp2 24072 0
parport_pc 37412 0
lp 12580 0
parport 37448 3 ppdev,parport_pc,lp
snd_hda_intel 263712 1
snd_pcm_oss 44672 0
snd_mixer_oss 17664 1 snd_pcm_oss
snd_pcm 80388 2 snd_hda_intel,snd_pcm_oss
snd_seq_dummy 4740 0
snd_seq_oss 33152 0
snd_seq_midi 9600 0
joydev 11328 0
snd_rawmidi 25728 1 snd_seq_midi
snd_seq_midi_event 8448 2 snd_seq_oss,snd_seq_midi
uvcvideo 48644 0
snd_seq 53232 6
snd_seq_dummy,snd_seq_oss,snd_seq_midi,snd_seq_midi_event
snd_timer 24324 2 snd_pcm,snd_seq
snd_seq_device 9228 5
snd_seq_dummy,snd_seq_oss,snd_seq_midi,snd_rawmidi,snd_seq
bcm43xx 127336 0
snd 54660 11
snd_hda_intel,snd_pcm_oss,snd_mixer_oss,snd_pcm,snd_seq_oss,snd_rawmidi,snd_seq,snd_timer,snd_seq_device
soundcore 8800 1 snd
compat_ioctl32 2304 1 uvcvideo
ieee80211softmac 31360 1 bcm43xx
usbhid 29536 0
ide_cd 32672 0
cdrom 37536 1 ide_cd
hci_usb 18332 2
videodev 29312 1 uvcvideo
v4l1_compat 15364 2 uvcvideo,videodev
v4l2_common 18432 2 uvcvideo,videodev
ieee80211 35656 2 bcm43xx,ieee80211softmac
ieee80211_crypt 7040 1 ieee80211
bluetooth 57060 7 rfcomm,l2cap,hci_usb
hid 28928 1 usbhid
snd_page_alloc 11400 2 snd_hda_intel,snd_pcm
nvidia 7859584 38
i2c_nforce2 7040 0
psmouse 39952 0
agpgart 35016 1 nvidia
serio_raw 8068 0
k8temp 6656 0
sdhci 18828 0
mmc_core 28420 1 sdhci
pcspkr 4224 0
i2c_core 26112 2 nvidia,i2c_nforce2
shpchp 34580 0
pci_hotplug 32704 1 shpchp
evdev 11136 7
ext3 133896 2
jbd 60456 1 ext3
mbcache 9732 1 ext3
sg 36764 0
sd_mod 30336 6
ata_generic 8452 0
ohci1394 36528 0
ieee1394 96312 2 sbp2,ohci1394
amd74xx 15260 0 [permanent]
ide_core 116804 2 ide_cd,amd74xx
forcedeth 51592 0
ohci_hcd 22916 0
ahci 23300 4
libata 125168 2 ata_generic,ahci
scsi_mod 147084 4 sbp2,sg,sd_mod,libata
ehci_hcd 36492 0
usbcore 138632 6 uvcvideo,usbhid,hci_usb,ohci_hcd,ehci_hcd
thermal 14344 0
processor 32072 2 powernow_k8,thermal
fan 5764 0
fuse 47124 3
apparmor 40728 0
commoncap 8320 1 apparmor
----------------------
$ lspci
00:00.0 RAM memory: nVidia Corporation MCP65 Memory Controller (rev a3)
00:01.0 ISA bridge: nVidia Corporation MCP65 LPC Bridge (rev a3)
00:01.1 SMBus: nVidia Corporation MCP65 SMBus (rev a1)
00:01.3 Co-processor: nVidia Corporation MCP65 SMU (rev a1)
00:02.0 USB Controller: nVidia Corporation MCP65 USB Controller (rev a3)
00:02.1 USB Controller: nVidia Corporation MCP65 USB Controller (rev a3)
00:06.0 Ethernet controller: nVidia Corporation MCP65 Ethernet (rev a3)
00:07.0 Audio device: nVidia Corporation MCP65 High Definition Audio (rev a1)
00:08.0 PCI bridge: nVidia Corporation MCP65 PCI bridge (rev a1)
00:09.0 IDE interface: nVidia Corporation MCP65 IDE (rev a1)
00:0a.0 IDE interface: nVidia Corporation MCP65 SATA Controller (rev a3)
00:0b.0 PCI bridge: nVidia Corporation Unknown device 045b (rev a1)
00:0c.0 PCI bridge: nVidia Corporation MCP65 PCI Express bridge (rev a1)
00:0d.0 PCI bridge: nVidia Corporation MCP65 PCI Express bridge (rev a1)
00:0e.0 PCI bridge: nVidia Corporation MCP65 PCI Express bridge (rev a1)
00:18.0 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron]
HyperTransport Technology Configuration
00:18.1 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] Address
Map
00:18.2 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron] DRAM
Controller
00:18.3 Host bridge: Advanced Micro Devices [AMD] K8 [Athlon64/Opteron]
Miscellaneous Control
03:00.0 Network controller: Broadcom Corporation BCM4312 802.11a/b/g (rev 02)
05:00.0 VGA compatible controller: nVidia Corporation GeForce 8400M GS (rev a1)
07:05.0 FireWire (IEEE 1394): Ricoh Co Ltd R5C832 IEEE 1394 Controller (rev 05)
07:05.1 Generic system peripheral [0805]: Ricoh Co Ltd R5C822
SD/SDIO/MMC/MS/MSPro Host Adapter (rev 22)
07:05.2 System peripheral: Ricoh Co Ltd R5C843 MMC Host Controller (rev 12)
07:05.3 System peripheral: Ricoh Co Ltd R5C592 Memory Stick Bus Host Adapter
(rev 12)
07:05.4 System peripheral: Ricoh Co Ltd xD-Picture Card Controller (rev 12)
----------------------
** Affects: ubuntu
Importance: Undecided
Status: New
--
ksoftirqd/1 using 50% CPU or above
https://bugs.launchpad.net/bugs/183461
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