>> And how do you handle a per CPU stack?
>
>How? (I'm not sure if I follow you here)
>
>Just use smp_processor_id() to select the right stack, just like
>do_IRQ already does to update the per-CPU interrupt statistics.
OK. Just implemented. To make my patch safe now I only need to align the
per interrupt stack with the memory page and memcpy from current to
irq_stack the task struct everytime there is an interrupt (I also need to
enlarge the per interrupt stack to 8kbyte due get_current()
implementation). Probably the memcpy will cause an high overhead... but
just to try...
And for the race I think that we could fix it.
Andrea[s] Arcangeli
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