usb_hcd_irq, irq nobody cared & threadirqs
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This problem does not seem to be particularly related to USB. It appears to be a bug in the threaded IRQ subsystem.
I don't know what I can do other than forward the message to people who might know more about it.
Alan Stern
Quoted 56 lines · kanyck
Hello Alan and everybody,
I apparently have the same problem but can't report it because the kernel.org is still not fully up. So I apologize if I've put my report in a wrong place...
I experienced very high iowait level during intensive disk I/O (up to 87% per CPU) on all the kernels I tried (2.6.32 and Debian backports' 2.6.38, 2.6.39) running on ASUS E35M1-M PRO (AMD e-350) platform
So I installed AVLinux's 3.0.3 kernel:
Linux version 3.0.3-avl-3-pae (trulan@avlinux) (gcc version 4.6.1 (Debian 4.6.1-4) ) #1 SMP PREEMPT Thu Aug 18 07:18:19 EDT 2011It worked much better but after a couple of hours my ethernet stops working and I see the following in my syslog:
Oct 16 21:31:43 localhost kernel: [14328.121907] irq 18: nobody cared (try booting with the "irqpoll" option) Oct 16 21:31:43 localhost kernel: [14328.125161] Pid: 658, comm: irq/18-ohci_hcd Not tainted 3.0.3-avl-3-pae #1 Oct 16 21:31:43 localhost kernel: [14328.128863] Call Trace: Oct 16 21:31:43 localhost kernel: [14328.132512] [<c1068fab>] ? __report_bad_irq+0x1c/0x8d Oct 16 21:31:43 localhost kernel: [14328.136168] [<c10692c3>] ? note_interrupt+0x11a/0x187 Oct 16 21:31:43 localhost kernel: [14328.139790] [<c10685df>] ? irq_thread+0xbf/0x15c Oct 16 21:31:43 localhost kernel: [14328.143373] [<c106869f>] ? irq_thread_fn+0x23/0x23 Oct 16 21:31:43 localhost kernel: [14328.146900] [<c1022289>] ? complete+0x28/0x36 Oct 16 21:31:43 localhost kernel: [14328.150385] [<c1068520>] ? irq_finalize_oneshot+0x9d/0x9d Oct 16 21:31:43 localhost kernel: [14328.153854] [<c1040587>] ? kthread+0x63/0x68 Oct 16 21:31:43 localhost kernel: [14328.157276] [<c1040524>] ? kthread_worker_fn+0x101/0x101 Oct 16 21:31:43 localhost kernel: [14328.160671] [<c1249a76>] ? kernel_thread_helper+0x6/0xd Oct 16 21:31:43 localhost kernel: [14328.164032] handlers: Oct 16 21:31:43 localhost kernel: [14328.167331] [<c1068080>] irq_default_primary_handler threaded [<ef7eccd5>] usb_hcd_irq Oct 16 21:31:43 localhost kernel: [14328.168325] [<c1068080>] irq_default_primary_handler threaded [<ef7eccd5>] usb_hcd_irq Oct 16 21:31:43 localhost kernel: [14328.168325] [<c1068080>] irq_default_primary_handler threaded [<ef7eccd5>] usb_hcd_irq Oct 16 21:31:43 localhost kernel: [14328.168325] [<c1068080>] irq_default_primary_handler threaded [<ef7eccd5>] usb_hcd_irq Oct 16 21:31:43 localhost kernel: [14328.168325] [<c1068080>] irq_default_primary_handler threaded [<ef9a54d9>] rtl8169_interrupt Oct 16 21:31:43 localhost kernel: [14328.183633] Disabling IRQ #18This happend repeatedly until I disabled threadirqs option. Now it is stable, however I returned to high latencies and terrific iowaits...
Please suggest how cold I get help?