Klaus Schmidinger wrote:
After letting it run for a while suddenly this happened:
Feb 18 15:19:42 video kernel: irq 5: nobody cared! Feb 18 15:19:42 video kernel: [<c010868c>] __report_bad_irq+0x1c/0x70 Feb 18 15:19:42 video kernel: [<c010875b>] note_interrupt+0x5b/0x80 Feb 18 15:19:42 video kernel: [<c010894c>] do_IRQ+0xdc/0x120 Feb 18 15:19:42 video kernel: [<c0106cd8>] common_interrupt+0x18/0x20 Feb 18 15:19:42 video kernel: [<c0104030>] default_idle+0x0/0x30 Feb 18 15:19:42 video kernel: [<c0104054>] default_idle+0x24/0x30 Feb 18 15:19:42 video kernel: [<c01040bc>] cpu_idle+0x1c/0x40 Feb 18 15:19:42 video kernel: [<c03ce6bd>] start_kernel+0x16d/0x1d0 Feb 18 15:19:42 video kernel: handlers: Feb 18 15:19:42 video kernel: [<d8d58eb0>] (kfir_irq+0x0/0x2f0 [kfir]) Feb 18 15:19:42 video kernel: Disabling IRQ #5
IRQ #5 is apparently the one assigned to the kfir card:
CPU0 0: 2748867 XT-PIC timer 2: 0 XT-PIC cascade 5: 100474 XT-PIC kfir 10: 140526 XT-PIC saa7146 (2) 11: 394979 XT-PIC saa7146 (1) 12: 7825916 XT-PIC eth0, saa7146 (0) 14: 8249 XT-PIC ide0 15: 0 XT-PIC ide1 NMI: 0 LOC: 0 ERR: 0 MIS: 0
Do you have any idea what might be the problem here?
"irq #: nobody cared" is triggered when 99000 of 100000 IRQs are not handled, e.g. kfir_irq returns IRQ_NONE instead of IRQ_HANDLED. There was a "return 0" where should've been IRQ_NONE, but AFAIK that couldn't have been the cause of this error. Try this patch with debug=1 and test it with 100000+ interrupts. I added some debug printk's around return IRQ_NONE ("unhandled irq", "was audio irq", "was video irq").
Done - log attached.
CPU0 0: 2826587 XT-PIC timer 2: 0 XT-PIC cascade 5: 100000 XT-PIC kfir 10: 159051 XT-PIC saa7146 (2) 11: 446599 XT-PIC saa7146 (1) 12: 8611351 XT-PIC eth0, saa7146 (0) 14: 6674 XT-PIC ide0 15: 0 XT-PIC ide1 NMI: 0 LOC: 0 ERR: 0 MIS: 0
After IRQ #5 had been disabled, no more data came from /dev/video.
Klaus
kfir-26.log.gz
Description: GNU Zip compressed data
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