Hi all,
When some kernel context disables interrupts in a CPU core (which maybe
the only core in non-SMP), how does the kernel take care of lost interrupts ?
Reading the local_irq_save() code to try to understand, it just saves the
%eflags reg, no more no less:
(old kernel version to avoid paravirtualization complexities):
#define local_irq_save(x) \
__asm__ __volatile__("pushfl ; popl %0 ; cli":"=g" (x): :"memory")
Do devices reemit interrupts if first ones was ignored ?.
Thanks,
--
Ahmed S. Darwish
http://darwish.07.googlepages.com
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