Oops with PREEMPT-RT on 126.96.36.199
scottwood at freescale.com
Tue May 20 07:38:44 EST 2008
Rune Torgersen wrote:
> Scott Wood wrote:
>> Almost certainly the latter. Is the disk interrupt shared with any
>> other interrupts, that are marked IRQF_NODELAY? The -rt
>> patch doesn't seem to handle mixing the two well.
> Disk is on a muxed PCI interrupt. None of the other interrupts on the
> mux is fireing at the time.
Regardless of whether they're firing, any request_irq with IRQF_NODELAY
will turn off threading for all handlers.
> Is is possible that the demuxer is not set up right? It is based loosely
> on pq2-pci-pic.c
Try calling irq_set_chip_and_handler() with handle_level_irq, rather
than irq_set_chip(). The -rt patch doesn't seem to have threadified the
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