Messages in this thread | | | Date | Wed, 13 Dec 2006 22:22:13 +0100 (MET) | From | Jan Engelhardt <> | Subject | Re: [GIT PATCH] more Driver core patches for 2.6.19 |
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>You can simply mask it, have it handled by userspace and re-enable it >when that's done. Though say hello to horrible interrupt latencies and >hope you aren't sharing it with anything critical...
For the sharing case, some sort of softirq should be created. That is, when a hard interrupt is generated and the irq handler is executed, set a flag that at some other point in time, the irq is delivered to userspace. Like you do with signals in userspace:
void sighandler(int s) { exit_main_loop_soon = 1; }
something similar could be done in kernelspace without interrupting important devices/irq_handlers sharing the same IRQ.
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