INFO: task khubd:271 blocked for more than 120 seconds.

[roma1390]

Hello,


We got this on our production system. Kernel: 2.6.26-2-amd64.
This seems to be related with http://bugzilla.kernel.org/show_bug.cgi?id=13316 and still is open. Sadly to have such long standing bugs in common used subsystems like USB.

Jun 15 06:25:01 accelerator57 kernel: imklog 3.18.6, log source = /proc/kmsg started.
Jun 16 00:36:55 accelerator57 kernel: [600606.885265] usb 6-1: USB disconnect, address 3
Jun 16 00:39:02 accelerator57 kernel: [600738.152638] INFO: task khubd:271 blocked for more than 120 seconds.
Jun 16 00:39:02 accelerator57 kernel: [600738.152682] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
Jun 16 00:39:02 accelerator57 kernel: [600738.155993] khubd         D ffff810916ca1400     0   271      2
Jun 16 00:39:02 accelerator57 kernel: [600738.156038]  ffff810919523d50 0000000000000046 363030365b3e363c 36323538382e3630
Jun 16 00:39:02 accelerator57 kernel: [600738.156118]  ffff810919521470 ffff810916dad220 ffff8109195216f8 00000000a00745a2
Jun 16 00:39:02 accelerator57 kernel: [600738.156197]  ffff810919523da4 ffff810916ca1600 0000000000000286 ffff8109148851c0
Jun 16 00:39:02 accelerator57 kernel: [600738.156245] Call Trace:
Jun 16 00:39:02 accelerator57 kernel: [600738.156308]  [<ffffffff8039035a>] usb_kill_urb+0xa8/0xdb
Jun 16 00:39:02 accelerator57 kernel: [600738.156612]  [<ffffffff80246111>] autoremove_wake_function+0x0/0x2e
Jun 16 00:39:02 accelerator57 kernel: [600738.156660]  [<ffffffff8038fa32>] usb_hcd_flush_endpoint+0xd4/0xeb
Jun 16 00:39:02 accelerator57 kernel: [600738.156707]  [<ffffffff80390a8e>] usb_disable_endpoint+0x5b/0x6d
Jun 16 00:39:02 accelerator57 kernel: [600738.156752]  [<ffffffff80390ac5>] usb_disable_device+0x25/0xe8
Jun 16 00:39:02 accelerator57 kernel: [600738.156792]  [<ffffffff8038c9cd>] usb_disconnect+0x92/0x142
Jun 16 00:39:02 accelerator57 kernel: [600738.156830]  [<ffffffff8038dc07>] hub_thread+0x3f9/0xcfd
Jun 16 00:39:02 accelerator57 kernel: [600738.156868]  [<ffffffff80246111>] autoremove_wake_function+0x0/0x2e
Jun 16 00:39:02 accelerator57 kernel: [600738.156910]  [<ffffffff8038d80e>] hub_thread+0x0/0xcfd
Jun 16 00:39:02 accelerator57 kernel: [600738.156952]  [<ffffffff80245feb>] kthread+0x47/0x74
Jun 16 00:39:02 accelerator57 kernel: [600738.156993]  [<ffffffff8023008d>] schedule_tail+0x27/0x5c
Jun 16 00:39:02 accelerator57 kernel: [600738.157036]  [<ffffffff8020cf38>] child_rip+0xa/0x12
Jun 16 00:39:02 accelerator57 kernel: [600738.157077]  [<ffffffff80245fa4>] kthread+0x0/0x74
Jun 16 00:39:02 accelerator57 kernel: [600738.157116]  [<ffffffff8020cf2e>] child_rip+0x0/0x12
Jun 16 00:39:02 accelerator57 kernel: [600738.157154]

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