Re: linux interrupt handling problem
Alan Cox (alan@lxorguk.ukuu.org.uk)
Tue, 9 Nov 1999 16:11:51 +0000 (GMT)
> The requirement for a sti() in interrupts makes it impossible to utilize
> these priorities to achieve better interrupt perfomance. What other people
> sometimes would like to have - the ability to preempt slow interrupts -
> get we for free implemented in hardware, but we can't use it because of
> the above requirement. :(
I can find no requirement that sti() in interrupts actually does anything.
It seems quite permissible for it to be a non inside of an IRQ handler or
to only lower the level to the current irq level
Alan
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