Public bug reported:
I noticed high activity of processor and detected that it was klog in
htop.
Syslog become > than 100 mb during sevreral minutes populated with
something like that (100000 last lines attached):
Oct 27 21:43:33 libero kernel: [79956.180012] Pid: 0, comm: swapper Not tainted
(2.6.27-7-generic #1)
Oct 27 21:43:33 libero kernel: [79956.180012] EIP: 0060:[<f8862800>] EFLAGS:
00000246 CPU: 0
Oct 27 21:43:33 libero kernel: [79956.180012] EIP is at
acpi_idle_enter_bm+0x268/0x2b7 [processor]
Oct 27 21:43:33 libero kernel: [79956.180012] EAX: c0510760 EBX: 000013db ECX:
00000000 EDX: 01cbf000
Oct 27 21:43:33 libero kernel: [79956.180012] ESI: 00000000 EDI: 0078b136 EBP:
c04a7f90 ESP: c04a7f74
Oct 27 21:43:33 libero kernel: [79956.180012] DS: 007b ES: 007b FS: 00d8 GS:
0000 SS: 0068
Oct 27 21:43:33 libero kernel: [79956.180012] CR0: 8005003b CR2: aa9161a0 CR3:
3556f000 CR4: 000026d0
Oct 27 21:43:33 libero kernel: [79956.180012] DR0: 00000000 DR1: 00000000 DR2:
00000000 DR3: 00000000
Oct 27 21:43:33 libero kernel: [79956.180012] DR6: ffff0ff0 DR7: 00000400
Oct 27 21:43:33 libero kernel: [79956.180012] [<c02dbf7b>]
cpuidle_idle_call+0x7b/0xd0
Oct 27 21:43:33 libero kernel: [79956.180012] [<c010288d>] cpu_idle+0x7d/0x140
Oct 27 21:43:33 libero kernel: [79956.180012] [<c036edc3>] rest_init+0x53/0x60
Oct 27 21:43:33 libero kernel: [79956.180012] =======================
Oct 27 21:43:33 libero kernel: [79956.180012] Pid: 0, comm: swapper Not tainted
2.6.27-7-generic #1
Oct 27 21:43:33 libero kernel: [79956.180012] [<c037c3f6>] ? printk+0x1d/0x1f
Oct 27 21:43:33 libero kernel: [79956.180012] [<c0122b8a>]
dequeue_task_idle+0x2a/0x40
Oct 27 21:43:33 libero kernel: [79956.180012] [<c012107f>]
dequeue_task+0xcf/0x130
Oct 27 21:43:33 libero kernel: [79956.180012] [<c012112a>]
deactivate_task+0x1a/0x30
Oct 27 21:43:33 libero kernel: [79956.180012] [<c037ca13>] schedule+0x4b3/0x790
Oct 27 21:43:33 libero kernel: [79956.180012] [<c012b6ab>] ?
default_wake_function+0xb/0x10
Oct 27 21:43:33 libero kernel: [79956.180012] [<c037e501>] ?
_spin_lock_irqsave+0x31/0x40
Oct 27 21:43:33 libero kernel: [79956.180012] [<c013c91c>] ?
__mod_timer+0xac/0xf0
Oct 27 21:43:33 libero kernel: [79956.180012] [<c037d094>]
schedule_timeout+0x84/0xf0
Oct 27 21:43:33 libero kernel: [79956.180012] [<c013c260>] ?
process_timeout+0x0/0x10
Oct 27 21:43:33 libero kernel: [79956.180012] [<c037d08f>] ?
schedule_timeout+0x7f/0xf0
Oct 27 21:43:33 libero kernel: [79956.180012] [<c037d11a>]
schedule_timeout_uninterruptible+0x1a/0x20
Oct 27 21:43:33 libero kernel: [79956.180012] [<c013c97d>] msleep+0x1d/0x30
Oct 27 21:43:33 libero kernel: [79956.180012] [<f8c21ceb>]
iwl_scan_cancel_timeout+0x4b/0x80 [iwlcore]
Oct 27 21:43:33 libero kernel: [79956.180012] [<f8bfbeb2>]
iwl4965_mac_update_tkip_key+0x32/0xe0 [iwlagn]
Oct 27 21:43:33 libero kernel: [79956.180012] [<f8bd410e>] ?
tkip_mixing_phase1+0xe/0x140 [mac80211]
Oct 27 21:43:33 libero kernel: [79956.180012] [<f8bd459c>]
ieee80211_tkip_decrypt_data+0x16c/0x210 [mac80211]
Oct 27 21:43:33 libero kernel: [79956.180012] [<f8bcb013>]
ieee80211_crypto_tkip_decrypt+0xd3/0x120 [mac80211]
Oct 27 21:43:33 libero kernel: [79956.180012] [<f8bd6667>]
ieee80211_rx_h_decrypt+0x187/0x1a0 [mac80211]
Oct 27 21:43:33 libero kernel: [79956.180012] [<f8bd8657>]
ieee80211_invoke_rx_handlers+0xe7/0x2a0 [mac80211]
Oct 27 21:43:33 libero kernel: [79956.180012] [<f8bd810c>]
__ieee80211_rx_handle_packet+0x21c/0x320 [mac80211]
Oct 27 21:43:33 libero kernel: [79956.180012] [<c014b79e>] ?
ktime_get+0x1e/0x40
Oct 27 21:43:33 libero kernel: [79956.180012] [<f8bd88c9>]
__ieee80211_rx+0xb9/0x1c0 [mac80211]
Oct 27 21:43:33 libero kernel: [79956.180012] [<f8bc7316>]
ieee80211_tasklet_handler+0xf6/0x120 [mac80211]
Oct 27 21:43:33 libero kernel: [79956.180012] [<c0137258>]
tasklet_action+0x78/0x100
Oct 27 21:43:33 libero kernel: [79956.180012] [<c0137682>]
__do_softirq+0x92/0x120
Oct 27 21:43:33 libero kernel: [79956.180012] [<c013776d>] do_softirq+0x5d/0x60
Oct 27 21:43:33 libero kernel: [79956.180012] [<c01378e5>] irq_exit+0x55/0x90
Oct 27 21:43:33 libero kernel: [79956.180012] [<c0106c1a>] do_IRQ+0x4a/0x80
Oct 27 21:43:33 libero kernel: [79956.180012] [<c0105003>]
common_interrupt+0x23/0x30
Oct 27 21:43:33 libero kernel: [79956.180012] [<c01700d8>] ?
__audit_mq_getsetattr+0x68/0xb0
Oct 27 21:43:33 libero kernel: [79956.180012] [<f8862800>] ?
acpi_idle_enter_bm+0x268/0x2b7 [processor]
Oct 27 21:43:33 libero kernel: [79956.180012] [<c02dbf7b>]
cpuidle_idle_call+0x7b/0xd0
Oct 27 21:43:33 libero kernel: [79956.180012] [<c010288d>] cpu_idle+0x7d/0x140
Oct 27 21:43:33 libero kernel: [79956.180012] [<c036edc3>] rest_init+0x53/0x60
Oct 27 21:43:33 libero kernel: [79956.180012] =======================
Oct 27 21:43:33 libero kernel: [79956.180012] Modules linked in: sco bridge stp
bnep rfcomm l2cap btusb bluetooth aes_i586 aes_generic ecryptfs i915 drm
af_packet binfmt_misc uvcvideo compat_ioctl32 videodev v4l1_compat uinput
kvm_intel kvm ppdev acpi_cpufreq cpufreq_conservative cpufreq_powersave
cpufreq_stats cpufreq_ondemand freq_table cpufreq_userspace sbs container
pci_slot wmi sbshc iptable_filter ip_tables x_tables ipv6 sbp2 parport_pc lp
parport snd_hda_intel snd_pcm_oss snd_mixer_oss snd_pcm snd_seq_dummy arc4 ecb
crypto_blkcipher snd_seq_oss iwlagn snd_seq_midi iwlcore snd_rawmidi
snd_seq_midi_event rfkill joydev led_class snd_seq appleir mac80211
isight_firmware evdev snd_timer appletouch snd_seq_device cfg80211 iTCO_wdt snd
iTCO_vendor_support soundcore video ac output intel_agp battery snd_page_alloc
pcspkr button agpgart shpchp pci_hotplug ext3 jbd mbcache sd_mod crc_t10dif
sr_mod cdrom sg ata_generic pata_acpi usbhid hid ata_piix libata scsi_mod dock
ohci1394 ieee1394 ehci_hcd sky2 uhci_hcd usbco
Oct 27 21:43:33 libero kernel: e dm_mirror dm_log dm_snapshot dm_mod thermal
processor fan fbcon tileblit font bitblit softcursor fuse
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
--
Pid: 0, comm: swapper Not tainted (2.6.27-7-generic #1) Oct 27 21:43:33
https://bugs.launchpad.net/bugs/290504
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