Public bug reported:
Today I found strange bug in kernel. My system was very slow and I found dd and
klogd are taking 100% of my cpu.
I take a look in /var/log/kern.log and saw those errors:
Oct 20 05:40:35 michallo-laptop kernel: [21300.953136] CE: hpet increasing
min_delta_ns to 33750 nsec
Oct 20 06:02:06 michallo-laptop kernel: [22591.473112] CE: hpet increasing
min_delta_ns to 50624 nsec
Oct 20 07:00:34 michallo-laptop kernel: [26099.438256] BUG: scheduling while
atomic: swapper/0/0x00000100
Oct 20 07:00:34 michallo-laptop kernel: [26099.438265] Modules linked in:
af_packet binfmt_misc sco bridge stp rfcomm bnep l2cap ipv6 ppdev acpi_cpufreq
cpufreq_ondemand cpufreq_userspace cpufreq_stats freq_
table cpufreq_powersave cpufreq_conservative pci_slot sbs sbshc container
iptable_filter ip_tables x_tables sbp2 parport_pc lp parport joydev arc4 ecb
crypto_blkcipher dcdbas psmouse serio_raw pcspkr iwlagn
btusb bluetooth iwlcore snd_hda_intel evdev rfkill snd_pcm_oss led_class
snd_mixer_oss mac80211 snd_pcm sdhci_pci sdhci cfg80211 uvcvideo mmc_core
compat_ioctl32 videodev ricoh_mmc v4l1_compat iTCO_wdt snd_s
eq_dummy iTCO_vendor_support nvidia(P) snd_seq_oss i2c_core video output
snd_seq_midi snd_rawmidi snd_seq_midi_event snd_seq snd_timer snd_seq_device
snd battery wmi button soundcore ac shpchp pci_hotplug sn
d_page_alloc intel_agp agpgart ext3 jbd mbcache usb_storage sr_mod cdrom usbhid
hid sd_mod crc_t10dif sg ata_piix ata_generic libusual ahci pata_acpi ohci1394
slI imt/so9lp2_4t_k8_+l+0er/cshp_uh 45667d4 /69
Oct 20 07:00:34 michallo-laptop kernel: >7e>19at3 r<lel tng b .0<,1exf0b11e x]
341>t 2.8ohoc2_ern
Oct 20 07:00:34 michallo-laptop kernel:
fxx3s6[e3lepi_nre.:s<cas95mwi]101c10n[/9r9[>pr1Tratd0]0<:
t05[_20.[n00/>>5.>e20eendete2 300 sec>p2t>01aes]x0x02a8 snodcl>P<c4 ca21
a0ex0<e4]<769 p_
Oct 20 07:00:34 michallo-laptop kernel: qaas _0>0]0re
Oct 20 07:00:34 michallo-laptop kernel: >l4d4__i]0o1x14 b=ro_erta[G0S:6:d<m4<8
2 9 >]0a000
Oct 20 07:00:34 michallo-laptop kernel: .ttcvo ->E1D[9+14a?et[74 4>4u02xd3kus
rskbI]60f=0< 1xa90[447<00t
40=]ulrctictlD:09<f1740mxa<1[sr>_+b6=44cbimts4P65R>0-vc>tpdhe22>9
Oct 20 07:00:34 michallo-laptop kernel: ad9=4bmbl_qisW 954x]4/9<kbpe
03x40o2x=0ecsp_q_de[7cC0c= 02u 2c0be20+cc>.il sipri_io447R 4e4 6nb4i5]4
a7fs4xgaocv ewr d2
Oct 20 07:00:34 michallo-laptop kernel: b[+[r1eetzceed50<?l>mtausrwmeehg47 0
r<>1eetzceed57<?l>mtausrwmvn :i0 l2 ea]e5cr604x20?00>mtuesrl_eehg< :f6cr[0
efzceed57<?l>mtausrrl_c n02 u=:8a9e5cr6.4520?00>mtues
rl_eehc47 05r4[0
Oct 20 07:00:34 michallo-laptop kernel: cceed50<?l>mtausrw_eehg47
05u4>1eet.c30x20?00>mtuesrl_eehg< 05u4>1eetzceed50<?l>mtausrrlvn :i02 l2
ea]e5cae1_520?00>mtuesrl_eehg47:06u>[0
Oct 20 07:00:34 michallo-laptop kernel: cc9e<50<?l>mtausrrl_c 00G0.=0
Oct 20 07:00:34 michallo-laptop kernel: 1 etzceed57<?l>mtausrrl_c n0.
[=:ea]e5cr6.4520?00>mtuesrl_eehg47 06u>[0
Oct 20 07:00:34 michallo-laptop kernel: cc9 <570?0>mdturr1ecl:0ED2l<>i>1eetzce
<520?i>4mtusersrnsh
Oct 20 07:00:34 michallo-laptop kernel: 740GC:C20 R04l.u05e4=2 uh1r
r<068k[>a>]019] e e]
Oct 20 07:00:34 michallo-laptop kernel: [eo55ftdc0cz.4a ccf609slot ert_pc
rrwlsd1lm_rie_vencorestl sd2:n g68>ir<::00074D:20 0R0 f2 4[l6 <
=4ce>m:->601e_>a>]019] e e]
Oct 20 07:00:34 michallo-laptop kernel: [eo55ftdc0c0.4ra crf60930.1
Oct 20 07:00:34 michallo-laptop kernel: 04_0<dx5>] c260270d8>] <4?
acpi09ei0l0>[26094mic: swdt_miscaufreq_ueslot sert_pc rrwlsd1lm_rie_vencornestl
dh2:n g68>ir<::00074DG2000R
Oct 20 07:00:34 michallo-laptop kernel: f2 4[l6 < =4ce>m:-46
Oct 20 07:00:34 michallo-laptop kernel: [e[>a>]019] e e]
Oct 20 07:00:34 michallo-laptop kernel: [eo55ftdc0c0.4ra crf6e9e301
Oct 20 07:00:34 michallo-laptop kernel: e440<dx5>] c260270d8>] <4?
acpi_0ei0l0>[26094mic: swt_miscaufreq_ueslot sert_pc rrwlsd1lm_rie_vencornestl
sh2:n g
Oct 20 07:00:34 michallo-laptop kernel: 8>ir<::00074D: 0 0R0 f2]4[l6 < =4ue1m
-46
Oct 20 07:00:34 michallo-laptop kernel: [e[>a>]019] e e]
Oct 20 07:00:34 michallo-laptop kernel: [eo55ftdc0c0.4ra crf6e0e30.
...
...
ct 20 07:00:34 michallo-laptop kernel: [26099.444015] [<c036edb3>]
rest_init+0x53/0x60
Oct 20 07:00:34 michallo-laptop kernel: [26099.444015] =======================
Oct 20 07:00:34 michallo-laptop kernel: [26099.444015] bad: scheduling f8/0x100
Oct 20 07:00:34 michallo-laptop kernel: [26099.444015] [<c0137682>]
__do_softirq+0x92/0x120
Oct 20 07:00:34 michallo-laptop kernel: [26099.444015] [<c013776d>]
do_softirq+0x5d/0x60
Oct 20 07:00:34 michallo-laptop kernel: [26099.444015] [<c01378e5>]
irq_exit+0x55/0x90
Oct 20 07:00:34 michallo-laptop kernel: [26099.444015] [<c0106c1a>]
do_IRQ+0x4a/0x80
Oct 20 07:00:34 michallo-laptop kernel: [26099.444015] [<c0105003>]
common_interrupt+0x23/0x30
Oct 20 07:00:34 michallo-laptop kernel: [26099.444015] [<c01700d8>] ?
__audit_mq_getsetattr+0x68/0xb0
Oct 20 07:00:34 michallo-laptop kernel: [26099.444015] [<f885a800>] ?
acpi_idle_enter_bm+0x268/0x2b7 [processor]
Oct 20 07:00:34 michallo-laptop kernel: [26099.444015] [<c02dbf6b>]
cpuidle_idle_call+0x7b/0xd0
Oct 20 07:00:34 michallo-laptop kernel: [26099.444015] [<c010288d>]
cpu_idle+0x7d/0x140
Oct 20 07:00:34 michallo-laptop kernel: [26099.444015] [<c036edb3>]
rest_init+0x53/0x60
Oct 20 07:00:34 michallo-laptop kernel: [26099.444015] =======================
Oct 20 07:00:34 michallo-laptop kernel: [26099.444015] BUG: scheduling while
atomic: swapper/0/0x00000100
Oct 20 07:00:34 michallo-laptop kernel: [26099.444015] Modules linked in:
af_packet binfmt_misc sco bridge stp rfcomm bnep l2cap ipv6 ppdev acpi_cpufreq
cpufreq_ondemand cpufreq_userspace cpufreq_stats freq_
table cpufreq_powersave cpufreq_conservative pci_slot sbs sbshc container
iptable_filter ip_tables x_tables sbp2 parport_pc lp parport joydev arc4 ecb
crypto_blkcipher dcdbas psmouse serio_raw pcspkr iwlagn
btusb bluetooth iwlcore snd_hda_intel evdev rfkill snd_pcm_oss led_class
snd_mixer_oss mac80211 snd_pcm sdhci_pci sdhci cfg80211 uvcvideo mmc_core
compat_ioctl32 videodev ricoh_mmc v4l1_compat iTCO_wdt snd_s
eq_dummy iTCO_vendor_support nvidia(P) snd_seq_oss i2c_core video output
snd_seq_midi snd_rawmidi snd_seq_midi_event snd_seq snd_timer snd_seq_device
snd battery wmi button soundcore ac shpchp pci_hotplug sn
d_page_alloc intel_agp agpgart ext3 jbd mbcache usb_storage sr_mod cdrom usbhid
hid sd_mod crc_t10dif sg ata_piix ata_generic libusual ahci pata_acpi ohci1394
sky2 libata scsi_mod dock ieee1394 uhci_hcd ehci
Oct 20 07:00:34 michallo-laptop kernel: hcd usbcore thermal processor fan fbcon
tileblit font bitblit softcursor fuse
Oct 20 07:00:34 michallo-laptop kernel: [26099.444015]
Oct 20 07:00:34 michallo-laptop kernel: [26099.444015] Pid: 0, comm: swapper
Tainted: P W (2.6.27-7-generic #1)
Oct 20 07:00:34 michallo-laptop kernel: [26099.444015] EIP: 0060:[<f885a800>]
EFLAGS: 00000246 CPU: 0
Oct 20 07:00:34 michallo-laptop kernel: [26099.444015] EIP is at
acpi_idle_enter_bm+0x268/0x2b7 [processor]
Oct 20 07:00:34 michallo-laptop kernel: [26099.444015] EAX: c0510760 EBX:
0000daf7 ECX: 00000000 EDX: 01cfe000
Oct 20 07:00:34 michallo-laptop kernel: [26099.444015] ESI: 00000000 EDI:
009cbbdf EBP: c04a7f90 ESP: c04a7f74
Oct 20 07:00:34 michallo-laptop kernel: [26099.444015] DS: 007b ES: 007b FS:
00d8 GS: 0000 SS: 0068
Oct 20 07:00:34 michallo-laptop kernel: [26099.444015] CR0: 8005003b CR2:
b59b3000 CR3: 00515000 CR4: 00000690
Oct 20 07:00:34 michallo-laptop kernel: [26099.444015] DR0: 00000000 DR1:
00000000 DR2: 00000000 DR3: 00000000
Oct 20 07:00:34 michallo-laptop kernel: [26099.444015] DR6: ffff0ff0 DR7:
00000400
Oct 20 07:00:34 michallo-laptop kernel: [26099.444015] [<c02dbf6b>]
cpuidle_idle_call+0x7b/0xd0
Oct 20 07:00:34 michallo-laptop kernel: [26099.444015] [<c010288d>]
cpu_idle+0x7d/0x140
Oct 20 07:00:34 michallo-laptop kernel: [26099.444015] [<c036edb3>]
rest_init+0x53/0x60
Oct 20 07:00:34 michallo-laptop kernel: [26099.444015] =======================
Oct 20 07:00:34 michallo-laptop kernel: [26099.444015] bad: scheduling from the
idle thread!
...
my kern.log very fast grew up to 2048MB.
** Affects: ubuntu
Importance: Undecided
Status: New
--
kernel 2.6.27-7-generic bug BUG: scheduling while atomic: swapper/0/0x00000100
https://bugs.launchpad.net/bugs/286285
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