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SubjectINFO: possible circular locking dependency detected
Hello,

I am now regularly getting this messages, mostly after booting apparently when the sound
system is initialised. Sound works despite of that but a few times I had to restart
pulseaudio by hand after suspend/wakeup.

Happened at least with 2.6.31.5 and 2.6.32. There is a webcam with a micro on USB and
a separate headset with micro on the Intel HDA chip.

Dec 6 10:29:59 localhost kernel: [ 3.019020] usb 5-5: new high speed USB device using ehci_hcd and address 4
Dec 6 10:29:59 localhost kernel: [ 3.164326] usb 5-5: New USB device found, idVendor=0ac8, idProduct=3420
Dec 6 10:29:59 localhost kernel: [ 3.164381] usb 5-5: New USB device strings: Mfr=1, Product=2, SerialNumber=0
Dec 6 10:29:59 localhost kernel: [ 3.164436] usb 5-5: Product: Venus USB2.0 Camera
Dec 6 10:29:59 localhost kernel: [ 3.164489] usb 5-5: Manufacturer: Vimicro Corp.
Dec 6 10:29:59 localhost kernel: [ 3.164662] usb 5-5: configuration #1 chosen from 1 choice

00:1c.1 PCI bridge: Intel Corporation 82801G (ICH7 Family) PCI Express Port 2 (rev 01)

# lsmod|grep snd
snd_hda_codec_realtek 194601 1
snd_hda_intel 19484 3
snd_hda_codec 63296 2 snd_hda_codec_realtek,snd_hda_intel
snd_usb_audio 66543 1
snd_seq_dummy 1238 0
snd_seq_oss 24395 0
snd_seq_midi_event 5199 1 snd_seq_oss
snd_seq 42692 5 snd_seq_dummy,snd_seq_oss,snd_seq_midi_event
snd_pcm_oss 34820 0
snd_mixer_oss 11312 1 snd_pcm_oss
snd_pcm 62220 4 snd_hda_intel,snd_hda_codec,snd_usb_audio,snd_pcm_oss
snd_usb_lib 13114 1 snd_usb_audio
snd_rawmidi 16541 1 snd_usb_lib
snd_seq_device 5354 4 snd_seq_dummy,snd_seq_oss,snd_seq,snd_rawmidi
snd_timer 15778 2 snd_seq,snd_pcm
snd_hwdep 4772 2 snd_hda_codec,snd_usb_audio
snd 49327 23 snd_hda_codec_realtek,snd_hda_intel,snd_hda_codec,snd_usb_audio,snd_seq_dummy,snd_seq_oss,snd_seq,snd_pcm_oss,snd_mixer_oss,snd_pcm,snd_usb_lib,snd_rawmidi,snd_seq_device,snd_timer,snd_hwdep
snd_page_alloc 6296 2 snd_hda_intel,snd_pcm
soundcore 5279 1 snd


Richard


Dec 6 10:30:36 localhost smartd[3781]: smartd has fork()ed into background mode. New PID=3781.
Dec 6 10:30:37 localhost acpid: client connected from 3833[0:0]
Dec 6 10:30:38 localhost kernel: [ 100.860426] [drm] Initialized drm 1.1.0 20060810
Dec 6 10:30:38 localhost kernel: [ 100.922964] pci 0000:00:02.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16
Dec 6 10:30:38 localhost kernel: [ 100.928812] [drm] Initialized i915 1.6.0 20080730 for 0000:00:02.0 on minor 0
Dec 6 10:31:03 localhost kernel: [ 126.095874] fuse init (API version 7.13)
Dec 6 10:31:15 localhost pulseaudio[4283]: main.c: Called SUID root and real-time and/or high-priority scheduling was requested in the configuration. However, we lack the necessary privileges:
Dec 6 10:31:15 localhost pulseaudio[4283]: main.c: We are not in group 'pulse-rt', PolicyKit refuse to grant us the requested privileges and we have no increase RLIMIT_NICE/RLIMIT_RTPRIO resource limits.
Dec 6 10:31:15 localhost pulseaudio[4283]: main.c: For enabling real-time/high-priority scheduling please acquire the appropriate PolicyKit privileges, or become a member of 'pulse-rt', or increase the RLIMIT_NICE/RLIMIT_RTPRIO resource limits for this user.
Dec 6 10:31:15 localhost pulseaudio[4349]: pid.c: Stale PID file, overwriting.
Dec 6 10:31:16 localhost pulseaudio[4366]: main.c: Called SUID root and real-time and/or high-priority scheduling was requested in the configuration. However, we lack the necessary privileges:
Dec 6 10:31:16 localhost pulseaudio[4366]: main.c: We are not in group 'pulse-rt', PolicyKit refuse to grant us the requested privileges and we have no increase RLIMIT_NICE/RLIMIT_RTPRIO resource limits.
Dec 6 10:31:16 localhost pulseaudio[4366]: main.c: For enabling real-time/high-priority scheduling please acquire the appropriate PolicyKit privileges, or become a member of 'pulse-rt', or increase the RLIMIT_NICE/RLIMIT_RTPRIO resource limits for this user.
Dec 6 10:31:19 localhost pulseaudio[4439]: main.c: Called SUID root and real-time and/or high-priority scheduling was requested in the configuration. However, we lack the necessary privileges:
Dec 6 10:31:19 localhost pulseaudio[4439]: main.c: We are not in group 'pulse-rt', PolicyKit refuse to grant us the requested privileges and we have no increase RLIMIT_NICE/RLIMIT_RTPRIO resource limits.
Dec 6 10:31:19 localhost pulseaudio[4439]: main.c: For enabling real-time/high-priority scheduling please acquire the appropriate PolicyKit privileges, or become a member of 'pulse-rt', or increase the RLIMIT_NICE/RLIMIT_RTPRIO resource limits for this user.

Dec 6 10:31:22 localhost pulseaudio[4349]: alsa-util.c: Device hw:0 doesn't support 2 channels, changed to 1.
Dec 6 10:31:36 localhost pulseaudio[4590]: pid.c: Daemon already running.
Dec 6 10:31:36 localhost pulseaudio[4592]: pid.c: Daemon already running.
Dec 6 10:31:36 localhost pulseaudio[4594]: pid.c: Daemon already running.
Dec 6 10:31:39 localhost kernel: [ 162.087835]
Dec 6 10:31:39 localhost kernel: [ 162.087836] =======================================================
Dec 6 10:31:39 localhost kernel: [ 162.087839] [ INFO: possible circular locking dependency detected ]
Dec 6 10:31:39 localhost kernel: [ 162.087842] 2.6.32v0 #1
Dec 6 10:31:39 localhost kernel: [ 162.087844] -------------------------------------------------------
Dec 6 10:31:39 localhost kernel: [ 162.087846] pulseaudio/4506 is trying to acquire lock:
Dec 6 10:31:39 localhost kernel: [ 162.087848] (sysfs_mutex){+.+.+.}, at: [<c050c99d>] sysfs_get_dirent+0x15/0x35
Dec 6 10:31:39 localhost kernel: [ 162.087857]
Dec 6 10:31:39 localhost kernel: [ 162.087858] but task is already holding lock:
Dec 6 10:31:39 localhost kernel: [ 162.087860] (&pcm->open_mutex){+.+.+.}, at: [<f80f4b2a>] snd_pcm_release+0x55/0x9e [snd_pcm]
Dec 6 10:31:39 localhost kernel: [ 162.087873]
Dec 6 10:31:39 localhost kernel: [ 162.087874] which lock already depends on the new lock.
Dec 6 10:31:39 localhost kernel: [ 162.087875]
Dec 6 10:31:39 localhost kernel: [ 162.087876]
Dec 6 10:31:39 localhost kernel: [ 162.087877] the existing dependency chain (in reverse order) is:
Dec 6 10:31:39 localhost kernel: [ 162.087879]
Dec 6 10:31:39 localhost kernel: [ 162.087880] -> #2 (&pcm->open_mutex){+.+.+.}:
Dec 6 10:31:39 localhost kernel: [ 162.087884] [<c045a703>] __lock_acquire+0xa2a/0xbb5
Dec 6 10:31:39 localhost kernel: [ 162.087890] [<c045a922>] lock_acquire+0x94/0xb1
Dec 6 10:31:39 localhost kernel: [ 162.087893] [<c07324a6>] __mutex_lock_common+0x35/0x2dc
Dec 6 10:31:39 localhost kernel: [ 162.087898] [<c07327eb>] mutex_lock_nested+0x30/0x38
Dec 6 10:31:39 localhost kernel: [ 162.087901] [<f80f4b2a>] snd_pcm_release+0x55/0x9e [snd_pcm]
Dec 6 10:31:39 localhost kernel: [ 162.087913] [<c04ca0b5>] __fput+0xf0/0x187
Dec 6 10:31:39 localhost kernel: [ 162.087918] [<c04ca165>] fput+0x19/0x1b
Dec 6 10:31:39 localhost kernel: [ 162.087921] [<c04b0d6b>] remove_vma+0x3e/0x5d
Dec 6 10:31:39 localhost kernel: [ 162.087926] [<c04b19f0>] do_munmap+0x21c/0x237
Dec 6 10:31:39 localhost kernel: [ 162.087929] [<c04b1a3b>] sys_munmap+0x30/0x3f
Dec 6 10:31:39 localhost kernel: [ 162.087932] [<c040321d>] syscall_call+0x7/0xb
Dec 6 10:31:39 localhost kernel: [ 162.087937]
Dec 6 10:31:39 localhost kernel: [ 162.087938] -> #1 (&mm->mmap_sem){++++++}:
Dec 6 10:31:39 localhost kernel: [ 162.087942] [<c045a703>] __lock_acquire+0xa2a/0xbb5
Dec 6 10:31:39 localhost kernel: [ 162.087946] [<c045a922>] lock_acquire+0x94/0xb1
Dec 6 10:31:39 localhost kernel: [ 162.087949] [<c04aba42>] might_fault+0x64/0x81
Dec 6 10:31:39 localhost kernel: [ 162.087952] [<c05b34cc>] copy_to_user+0x2c/0xfc
Dec 6 10:31:39 localhost kernel: [ 162.087957] [<c04d4879>] filldir+0x78/0xb7
Dec 6 10:31:39 localhost kernel: [ 162.087961] [<c050c88d>] sysfs_readdir+0x117/0x14b
Dec 6 10:31:39 localhost kernel: [ 162.087964] [<c04d49dd>] vfs_readdir+0x68/0x94
Dec 6 10:31:39 localhost kernel: [ 162.087968] [<c04d4b0b>] sys_getdents+0x62/0xa1
Dec 6 10:31:39 localhost kernel: [ 162.087971] [<c040321d>] syscall_call+0x7/0xb
Dec 6 10:31:39 localhost kernel: [ 162.087975]
Dec 6 10:31:39 localhost kernel: [ 162.087975] -> #0 (sysfs_mutex){+.+.+.}:
Dec 6 10:31:39 localhost kernel: [ 162.087979] [<c045a610>] __lock_acquire+0x937/0xbb5
Dec 6 10:31:39 localhost kernel: [ 162.087983] [<c045a922>] lock_acquire+0x94/0xb1
Dec 6 10:31:39 localhost kernel: [ 162.087986] [<c07324a6>] __mutex_lock_common+0x35/0x2dc
Dec 6 10:31:39 localhost kernel: [ 162.087990] [<c07327eb>] mutex_lock_nested+0x30/0x38
Dec 6 10:31:39 localhost kernel: [ 162.087993] [<c050c99d>] sysfs_get_dirent+0x15/0x35
Dec 6 10:31:39 localhost kernel: [ 162.087996] [<c050e03e>] sysfs_remove_group+0x1e/0xa3
Dec 6 10:31:39 localhost kernel: [ 162.088000] [<c062bf50>] dpm_sysfs_remove+0x10/0x12
Dec 6 10:31:39 localhost kernel: [ 162.088006] [<c0627108>] device_del+0x33/0x154
Dec 6 10:31:39 localhost kernel: [ 162.088010] [<c0627251>] device_unregister+0x28/0x4b
Dec 6 10:31:39 localhost kernel: [ 162.088014] [<c0678499>] usb_remove_ep_devs+0x15/0x1f
Dec 6 10:31:39 localhost kernel: [ 162.088018] [<c0672ba2>] remove_intf_ep_devs+0x21/0x32
Dec 6 10:31:39 localhost kernel: [ 162.088023] [<c0673b3a>] usb_set_interface+0x10c/0x19f
Dec 6 10:31:39 localhost kernel: [ 162.088027] [<f832dce6>] snd_usb_capture_close+0x1e/0x37 [snd_usb_audio]
Dec 6 10:31:39 localhost kernel: [ 162.088040] [<f80f4aac>] snd_pcm_release_substream+0x3d/0x66 [snd_pcm]
Dec 6 10:31:39 localhost kernel: [ 162.088050] [<f80f4b31>] snd_pcm_release+0x5c/0x9e [snd_pcm]
Dec 6 10:31:39 localhost kernel: [ 162.088058] [<c04ca0b5>] __fput+0xf0/0x187
Dec 6 10:31:39 localhost kernel: [ 162.088062] [<c04ca165>] fput+0x19/0x1b
Dec 6 10:31:39 localhost kernel: [ 162.088065] [<c04b0d6b>] remove_vma+0x3e/0x5d
Dec 6 10:31:39 localhost kernel: [ 162.088069] [<c04b19f0>] do_munmap+0x21c/0x237
Dec 6 10:31:39 localhost kernel: [ 162.088072] [<c04b1a3b>] sys_munmap+0x30/0x3f
Dec 6 10:31:39 localhost kernel: [ 162.088076] [<c040321d>] syscall_call+0x7/0xb
Dec 6 10:31:39 localhost kernel: [ 162.088079]
Dec 6 10:31:39 localhost kernel: [ 162.088080] other info that might help us debug this:
Dec 6 10:31:39 localhost kernel: [ 162.088080]
Dec 6 10:31:39 localhost kernel: [ 162.088083] 2 locks held by pulseaudio/4506:
Dec 6 10:31:39 localhost kernel: [ 162.088085] #0: (&mm->mmap_sem){++++++}, at: [<c04b1a2e>] sys_munmap+0x23/0x3f
Dec 6 10:31:39 localhost kernel: [ 162.088090] #1: (&pcm->open_mutex){+.+.+.}, at: [<f80f4b2a>] snd_pcm_release+0x55/0x9e [snd_pcm]
Dec 6 10:31:39 localhost kernel: [ 162.088104]
Dec 6 10:31:39 localhost kernel: [ 162.088105] stack backtrace:
Dec 6 10:31:39 localhost kernel: [ 162.088108] Pid: 4506, comm: pulseaudio Not tainted 2.6.32v0 #1
Dec 6 10:31:39 localhost kernel: [ 162.088110] Call Trace:
Dec 6 10:31:39 localhost kernel: [ 162.088113] [<c07312cc>] ? printk+0xf/0x13
Dec 6 10:31:39 localhost kernel: [ 162.088117] [<c045999b>] print_circular_bug+0x91/0x9d
Dec 6 10:31:39 localhost kernel: [ 162.088121] [<c045a610>] __lock_acquire+0x937/0xbb5
Dec 6 10:31:39 localhost kernel: [ 162.088124] [<c04584f5>] ? save_trace+0x37/0xa3
Dec 6 10:31:39 localhost kernel: [ 162.088128] [<c045a922>] lock_acquire+0x94/0xb1
Dec 6 10:31:39 localhost kernel: [ 162.088131] [<c050c99d>] ? sysfs_get_dirent+0x15/0x35
Dec 6 10:31:39 localhost kernel: [ 162.088135] [<c07324a6>] __mutex_lock_common+0x35/0x2dc
Dec 6 10:31:39 localhost kernel: [ 162.088138] [<c050c99d>] ? sysfs_get_dirent+0x15/0x35
Dec 6 10:31:39 localhost kernel: [ 162.088141] [<c0458f23>] ? mark_held_locks+0x43/0x5b
Dec 6 10:31:39 localhost kernel: [ 162.088145] [<c04591bf>] ? trace_hardirqs_on+0xb/0xd
Dec 6 10:31:39 localhost kernel: [ 162.088148] [<c07327eb>] mutex_lock_nested+0x30/0x38
Dec 6 10:31:39 localhost kernel: [ 162.088151] [<c050c99d>] ? sysfs_get_dirent+0x15/0x35
Dec 6 10:31:39 localhost kernel: [ 162.088154] [<c050c99d>] sysfs_get_dirent+0x15/0x35
Dec 6 10:31:39 localhost kernel: [ 162.088157] [<c050e03e>] sysfs_remove_group+0x1e/0xa3
Dec 6 10:31:39 localhost kernel: [ 162.088161] [<c062bf50>] dpm_sysfs_remove+0x10/0x12
Dec 6 10:31:39 localhost kernel: [ 162.088164] [<c0627108>] device_del+0x33/0x154
Dec 6 10:31:39 localhost kernel: [ 162.088168] [<c0627251>] device_unregister+0x28/0x4b
Dec 6 10:31:39 localhost kernel: [ 162.088171] [<c0678499>] usb_remove_ep_devs+0x15/0x1f
Dec 6 10:31:39 localhost kernel: [ 162.088174] [<c0672ba2>] remove_intf_ep_devs+0x21/0x32
Dec 6 10:31:39 localhost kernel: [ 162.088178] [<c0673b3a>] usb_set_interface+0x10c/0x19f
Dec 6 10:31:39 localhost kernel: [ 162.088190] [<f832dce6>] snd_usb_capture_close+0x1e/0x37 [snd_usb_audio]
Dec 6 10:31:39 localhost kernel: [ 162.088199] [<f80f4aac>] snd_pcm_release_substream+0x3d/0x66 [snd_pcm]
Dec 6 10:31:39 localhost kernel: [ 162.088208] [<f80f4b31>] snd_pcm_release+0x5c/0x9e [snd_pcm]
Dec 6 10:31:39 localhost kernel: [ 162.088211] [<c04ca0b5>] __fput+0xf0/0x187
Dec 6 10:31:39 localhost kernel: [ 162.088215] [<c04ca165>] fput+0x19/0x1b
Dec 6 10:31:39 localhost kernel: [ 162.088218] [<c04b0d6b>] remove_vma+0x3e/0x5d
Dec 6 10:31:39 localhost kernel: [ 162.088221] [<c04b19f0>] do_munmap+0x21c/0x237
Dec 6 10:31:39 localhost kernel: [ 162.088225] [<c04b1a3b>] sys_munmap+0x30/0x3f
Dec 6 10:31:39 localhost kernel: [ 162.088228] [<c040321d>] syscall_call+0x7/0xb
[unhandled content-type:application/x-bzip2]
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