Re: PATCH: 2.6.10 - Misrouted IRQ recovery for review

[Bill Davidsen <davidsen@tmr.com>]

Alan Cox wrote:
> Ported to the new kernel/irq code.

	[snip]

>  	} else {
> -		printk(KERN_ERR "irq %d: nobody cared!\n", irq);
> +		printk(KERN_ERR "irq %d: nobody cared (try booting with the \"irqpoll\" option.\n", irq);
>  	}
>  	dump_stack();
>  	printk(KERN_ERR "handlers:\n");
	[snip]

I saw this message coming out of ac2 with my runaway IRQ 18 problem, so 
I tried irqpoll, and it just "went away" beyond sysreq or other gentle 
recovery.

I suspect that the problem lies in sharing the shared IRQ, and that 
polling doesn't solve the problem, just changes it to a hang witing for 
the misrouted IRQ. Still poking for the real cause, no patch or 
anything, but acpi={off,ht}, noapic, pci=routeirq, etc have no benefit 
(for me).


-- 
bill davidsen <davidsen@tmr.com>
   CTO TMR Associates, Inc
   Doing interesting things with small computers since 1979