Messages in this thread | | | Date | Tue, 9 Nov 1999 17:37:10 +0100 (MET) | From | Roman Zippel <> | Subject | Re: linux interrupt handling problem |
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Hi,
On Tue, 9 Nov 1999, Linus Torvalds wrote:
> That is in fact what Linux/SMP does in various situations: a "sti()" in an > interrupt handler on SMP/i386 will be just a "local" sti(), while ir in > normal situations will be a "global" sti().
That's the software version of priorities, on m68k this can be realized in hardware with 7 levels, but we can't use it if everyone is allowed to play with the interrupt mask.
bye, Roman
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