Public bug reported:
I noticed that both Ethernet LEDs (link and data) were on on my laptop,
even though nothing is connected to the Ethernet socket. I ran dmesg
and saw a bunch of errors like this:
[32563.988147] ------------[ cut here ]------------
[32563.988162] WARNING: at
/build/buildd/linux-2.6.27/drivers/net/e1000e/ich8lan.c:403
e1000_acquire_swflag_ich8lan+0x47/0xd0 [e1000e]()
[32563.988171] e1000e mutex contention. Owned by pid -1
[32563.988178] Modules linked in: usbhid hid af_packet i915 drm rfcomm sco
bridge stp bnep l2cap binfmt_misc ppdev ipv6 acpi_cpufreq cpufreq_conservative
cpufreq_stats cpufreq_ondemand cpufreq_userspace cpufreq_powersave freq_table
pci_slot sbs sbshc container iptable_filter ip_tables x_tables uinput sbp2
parport_pc lp parport joydev pcmcia snd_hda_intel snd_pcm_oss snd_mixer_oss
snd_pcm snd_seq_dummy arc4 snd_seq_oss ecb snd_seq_midi crypto_blkcipher
snd_rawmidi snd_seq_midi_event snd_seq iwl3945 thinkpad_acpi snd_timer
snd_seq_device rfkill btusb mac80211 nvram sdhci_pci yenta_socket serio_raw snd
rsrc_nonstatic video led_class battery sdhci bluetooth evdev psmouse output ac
cfg80211 bay pcmcia_core ricoh_mmc soundcore intel_agp mmc_core wmi agpgart
snd_page_alloc button pcspkr iTCO_wdt iTCO_vendor_support shpchp pci_hotplug
ext3 jbd mbcache sd_mod crc_t10dif sr_mod cdrom sg pata_acpi ata_piix ohci1394
ata_generic ieee1394 libata scsi_mod uhci_hcd ehci_hcd usbcore e1000e dock
thermal processor fan fuse vesafb fbcon tileblit font bitblit softcursor
[32563.988408] Pid: 3498, comm: events/1 Tainted: G W 2.6.27-7-generic #1
[32563.988418] [<c0131d65>] warn_slowpath+0x65/0x90
[32563.988436] [<c01376e6>] ? __do_softirq+0xf6/0x120
[32563.988448] [<c037d3f9>] ? mutex_trylock+0x9/0x30
[32563.988462] [<f9047c17>] e1000_acquire_swflag_ich8lan+0x47/0xd0 [e1000e]
[32563.988487] [<f904c9e1>] e1000e_read_phy_reg_igp+0x21/0x70 [e1000e]
[32563.988510] [<f904cc48>] e1000e_phy_has_link_generic+0x48/0xe0 [e1000e]
[32563.988533] [<f904ba74>] e1000e_check_for_copper_link+0x34/0x90 [e1000e]
[32563.988556] [<f9055d3b>] e1000_watchdog_task+0x47b/0x650 [e1000e]
[32563.988578] [<c0192350>] ? vmstat_update+0x0/0x30
[32563.988596] [<f90558c0>] ? e1000_watchdog_task+0x0/0x650 [e1000e]
[32563.988617] [<c0143645>] run_workqueue+0x95/0x160
[32563.988627] [<c0147576>] ? finish_wait+0x16/0x70
[32563.988636] [<c01438e8>] worker_thread+0x88/0xf0
[32563.988646] [<c01474b0>] ? autoremove_wake_function+0x0/0x50
[32563.988656] [<c0143860>] ? worker_thread+0x0/0xf0
[32563.988666] [<c0147141>] kthread+0x41/0x80
[32563.988674] [<c0147100>] ? kthread+0x0/0x80
[32563.988684] [<c0105297>] kernel_thread_helper+0x7/0x10
[32563.988695] =======================
[32563.988701] ---[ end trace b6746cad1ac5efd0 ]---
[32565.989075] ------------[ cut here ]------------
[32565.989087] WARNING: at
/build/buildd/linux-2.6.27/drivers/net/e1000e/ich8lan.c:403
e1000_acquire_swflag_ich8lan+0x47/0xd0 [e1000e]()
[32565.989092] e1000e mutex contention. Owned by pid -1
[32565.989095] Modules linked in: usbhid hid af_packet i915 drm rfcomm sco
bridge stp bnep l2cap binfmt_misc ppdev ipv6 acpi_cpufreq cpufreq_conservative
cpufreq_stats cpufreq_ondemand cpufreq_userspace cpufreq_powersave freq_table
pci_slot sbs sbshc container iptable_filter ip_tables x_tables uinput sbp2
parport_pc lp parport joydev pcmcia snd_hda_intel snd_pcm_oss snd_mixer_oss
snd_pcm snd_seq_dummy arc4 snd_seq_oss ecb snd_seq_midi crypto_blkcipher
snd_rawmidi snd_seq_midi_event snd_seq iwl3945 thinkpad_acpi snd_timer
snd_seq_device rfkill btusb mac80211 nvram sdhci_pci yenta_socket serio_raw snd
rsrc_nonstatic video led_class battery sdhci bluetooth evdev psmouse output ac
cfg80211 bay pcmcia_core ricoh_mmc soundcore intel_agp mmc_core wmi agpgart
snd_page_alloc button pcspkr iTCO_wdt iTCO_vendor_support shpchp pci_hotplug
ext3 jbd mbcache sd_mod crc_t10dif sr_mod cdrom sg pata_acpi ata_piix ohci1394
ata_generic ieee1394 libata scsi_mod uhci_hcd ehci_hcd usbcore e1000e dock
thermal processor fan fuse vesafb fbcon tileblit font bitblit softcursor
[32565.989202] Pid: 3498, comm: events/1 Tainted: G W 2.6.27-7-generic #1
[32565.989206] [<c0131d65>] warn_slowpath+0x65/0x90
[32565.989215] [<c01376e6>] ? __do_softirq+0xf6/0x120
[32565.989221] [<c014a72d>] ? enqueue_hrtimer+0x7d/0x130
[32565.989226] [<c014a72d>] ? enqueue_hrtimer+0x7d/0x130
[32565.989230] [<c014b474>] ? hrtimer_start+0xc4/0x1c0
[32565.989234] [<c037d3f9>] ? mutex_trylock+0x9/0x30
[32565.989241] [<f9047c17>] e1000_acquire_swflag_ich8lan+0x47/0xd0 [e1000e]
[32565.989252] [<f904c9e1>] e1000e_read_phy_reg_igp+0x21/0x70 [e1000e]
[32565.989263] [<f904cc48>] e1000e_phy_has_link_generic+0x48/0xe0 [e1000e]
[32565.989273] [<f904ba74>] e1000e_check_for_copper_link+0x34/0x90 [e1000e]
[32565.989283] [<f9055d3b>] e1000_watchdog_task+0x47b/0x650 [e1000e]
[32565.989294] [<f90558c0>] ? e1000_watchdog_task+0x0/0x650 [e1000e]
[32565.989303] [<c0143645>] run_workqueue+0x95/0x160
[32565.989308] [<c0147576>] ? finish_wait+0x16/0x70
[32565.989312] [<c01438e8>] worker_thread+0x88/0xf0
[32565.989316] [<c01474b0>] ? autoremove_wake_function+0x0/0x50
[32565.989320] [<c0143860>] ? worker_thread+0x0/0xf0
[32565.989325] [<c0147141>] kthread+0x41/0x80
[32565.989329] [<c0147100>] ? kthread+0x0/0x80
[32565.989333] [<c0105297>] kernel_thread_helper+0x7/0x10
[32565.989337] =======================
[32565.989340] ---[ end trace b6746cad1ac5efd0 ]---
The kernel has been dumping these errors nonstop into syslog at the rate
of about 1.7 kilobytes per second for the last three and a half hours.
This is on Intrepid with kernel 2.6.27-7.15. modinfo e1000e says
filename:
/lib/modules/2.6.27-7-generic/kernel/drivers/net/e1000e/e1000e.ko
version: 0.3.3.3-k6
license: GPL
description: Intel(R) PRO/1000 Network Driver
author: Intel Corporation, <[EMAIL PROTECTED]>
srcversion: 54888943F7F010F34581053
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
--
e1000e mutex contention
https://bugs.launchpad.net/bugs/291801
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