Seeing this on my Dell Latitude. The timestamps from the 'cut here' and WARNING lines are different even though they're issued by sequential lines in panic.c - but then the printk timestamps remain identical even through an *entire second* WARN call. Is somebody blocking clock interrupts and failing to re-enable them, or is something different going on here? [42836.057704] IN=wlan0 OUT= MAC=ff:ff:ff:ff:ff:ff:94:44:52:1a:8f:57:08:00 SRC=192.168.2.1 DST=192.168.2.255 LEN=37 TOS=0x00 PREC=0x00 TTL=64 ID=0 DF PROTO=UDP SPT=32769 DPT=10111 LEN=17 [42860.244827] IN=wlan0 OUT= MAC=ff:ff:ff:ff:ff:ff:94:44:52:1a:8f:57:08:00 SRC=192.168.2.1 DST=192.168.2.255 LEN=37 TOS=0x00 PREC=0x00 TTL=64 ID=0 DF PROTO=UDP SPT=32769 DPT=10111 LEN=17 [42875.543219] ------------[ cut here ]------------ [42875.544006] WARNING: at lib/plist.c:57 plist_check_head+0x47/0x114() [42875.544006] Hardware name: Latitude E6500 [42875.544006] Modules linked in: ppp_async sunrpc microcode usb_storage [last unloaded: scsi_wait_scan] [42875.544006] Pid: 58070, comm: pulseaudio Tainted: G W 2.6.35-rc5-mmotm0719 #2 [42875.544006] Call Trace: [42875.544006] [] warn_slowpath_common+0x80/0x98 [42875.544006] [] warn_slowpath_null+0x15/0x17 [42875.544006] [] plist_check_head+0x47/0x114 [42875.544006] [] plist_add+0x1b/0xb1 [42875.544006] [] update_target+0x94/0xd0 [42875.544006] [] pm_qos_add_request+0x79/0x7b [42875.544006] [] snd_pcm_hw_params+0x25a/0x28a [42875.544006] [] snd_pcm_common_ioctl1+0x23b/0x980 [42875.544006] [] ? inode_has_perm.clone.18+0x92/0xa2 [42875.544006] [] snd_pcm_playback_ioctl1+0x231/0x246 [42875.544006] [] ? fd_install+0x36/0xd5 [42875.544006] [] snd_pcm_playback_ioctl+0x2a/0x2e [42875.544006] [] vfs_ioctl+0x31/0xa2 [42875.544006] [] do_vfs_ioctl+0x496/0x4c9 [42875.544006] [] sys_ioctl+0x57/0x96 [42875.544006] [] system_call_fastpath+0x16/0x1b [42875.544006] ---[ end trace 23d666d936caf587 ]--- [42875.544006] ------------[ cut here ]------------ [42875.544006] WARNING: at lib/plist.c:57 plist_check_head+0x47/0x114() [42875.544006] Hardware name: Latitude E6500 [42875.544006] Modules linked in: ppp_async sunrpc microcode usb_storage [last unloaded: scsi_wait_scan] [42875.544006] Pid: 58070, comm: pulseaudio Tainted: G W 2.6.35-rc5-mmotm0719 #2 [42875.544006] Call Trace: [42875.544006] [] warn_slowpath_common+0x80/0x98 [42875.544006] [] warn_slowpath_null+0x15/0x17 [42875.544006] [] plist_check_head+0x47/0x114 [42875.544006] [] plist_add+0xa8/0xb1 [42875.544006] [] update_target+0x94/0xd0 [42875.544006] [] pm_qos_add_request+0x79/0x7b [42875.544006] [] snd_pcm_hw_params+0x25a/0x28a [42875.544006] [] snd_pcm_common_ioctl1+0x23b/0x980 [42875.544006] [] ? inode_has_perm.clone.18+0x92/0xa2 [42875.544006] [] snd_pcm_playback_ioctl1+0x231/0x246 [42875.544006] [] ? fd_install+0x36/0xd5 [42875.544006] [] snd_pcm_playback_ioctl+0x2a/0x2e [42875.544006] [] vfs_ioctl+0x31/0xa2 [42875.544006] [] do_vfs_ioctl+0x496/0x4c9 [42875.544006] [] sys_ioctl+0x57/0x96 [42875.544006] [] system_call_fastpath+0x16/0x1b [42875.544006] ---[ end trace 23d666d936caf588 ]--- [42882.427310] ------------[ cut here ]------------ [42882.428016] WARNING: at lib/plist.c:57 plist_check_head+0x47/0x114() [42882.428016] Hardware name: Latitude E6500 [42882.428016] Modules linked in: ppp_async sunrpc microcode usb_storage [last unloaded: scsi_wait_scan] [42882.428016] Pid: 58070, comm: pulseaudio Tainted: G W 2.6.35-rc5-mmotm0719 #2 [42882.428016] Call Trace: [42882.428016] [] warn_slowpath_common+0x80/0x98 [42882.428016] [] warn_slowpath_null+0x15/0x17 [42882.428016] [] plist_check_head+0x47/0x114 [42882.428016] [] plist_del+0x1f/0x8b [42882.428016] [] update_target+0x87/0xd0 [42882.428016] [] pm_qos_remove_request+0x4c/0x5c [42882.428016] [] snd_pcm_common_ioctl1+0x2eb/0x980 [42882.428016] [] ? inode_has_perm.clone.18+0x92/0xa2 [42882.428016] [] snd_pcm_playback_ioctl1+0x231/0x246 [42882.428016] [] ? trace_preempt_on+0x15/0x28 [42882.428016] [] ? unmap_region+0xbd/0xcc [42882.428016] [] snd_pcm_playback_ioctl+0x2a/0x2e [42882.428016] [] vfs_ioctl+0x31/0xa2 [42882.428016] [] do_vfs_ioctl+0x496/0x4c9 [42882.428016] [] sys_ioctl+0x57/0x96 [42882.428016] [] ? unlink_file_vma+0x2d/0x4d [42882.428016] [] system_call_fastpath+0x16/0x1b [42882.428016] ---[ end trace 23d666d936caf589 ]--- [42882.428016] ------------[ cut here ]------------ [42882.428016] WARNING: at lib/plist.c:57 plist_check_head+0x47/0x114() [42882.428016] Hardware name: Latitude E6500 [42882.428016] Modules linked in: ppp_async sunrpc microcode usb_storage [last unloaded: scsi_wait_scan] [42882.428016] Pid: 58070, comm: pulseaudio Tainted: G W 2.6.35-rc5-mmotm0719 #2 [42882.428016] Call Trace: [42882.428016] [] warn_slowpath_common+0x80/0x98 [42882.428016] [] warn_slowpath_null+0x15/0x17 [42882.428016] [] plist_check_head+0x47/0x114 [42882.428016] [] plist_del+0x82/0x8b [42882.428016] [] update_target+0x87/0xd0 [42882.428016] [] pm_qos_remove_request+0x4c/0x5c [42882.428016] [] snd_pcm_common_ioctl1+0x2eb/0x980 [42882.428016] [] ? inode_has_perm.clone.18+0x92/0xa2 [42882.428016] [] snd_pcm_playback_ioctl1+0x231/0x246 [42882.428016] [] ? trace_preempt_on+0x15/0x28 [42882.428016] [] ? unmap_region+0xbd/0xcc [42882.428016] [] snd_pcm_playback_ioctl+0x2a/0x2e [42882.428016] [] vfs_ioctl+0x31/0xa2 [42882.428016] [] do_vfs_ioctl+0x496/0x4c9 [42882.428016] [] sys_ioctl+0x57/0x96 [42882.428016] [] ? unlink_file_vma+0x2d/0x4d [42882.428016] [] system_call_fastpath+0x16/0x1b [42882.428016] ---[ end trace 23d666d936caf58a ]--- [42884.623327] IN=wlan0 OUT= MAC=ff:ff:ff:ff:ff:ff:94:44:52:1a:8f:57:08:00 SRC=192.168.2.1 DST=192.168.2.255 LEN=37 TOS=0x00 PREC=0x00 TTL=64 ID=0 DF PROTO=UDP SPT=32769 DPT=10111 LEN=17 [42914.070946] IN=wlan0 OUT= MAC=ff:ff:ff:ff:ff:ff:94:44:52:1a:8f:57:08:00 SRC=192.168.2.1 DST=192.168.2.255 LEN=37 TOS=0x00 PREC=0x00 TTL=64 ID=0 DF PROTO=UDP SPT=32769 DPT=10111 LEN=17