> > It's trivial to calculate for DAGs -- directed acyclic graphs. It's
> > when the "acyclic" constraint is violated that you have problems!
>
> It may well be that interrupt stacks are a win anyway. If we can get the kernel
> struct out of the stack pages (which would fix some very unpleasant cache
> colour problems) and take the non irq stack down to 4K then irq stacks would
> pay off once you had 25 or so processes on a system
For what it is worth, we are using interrupt stack on x86-64. And it
was not *that* painfull.
Pavel
-- I'm pavel@ucw.cz. "In my country we have almost anarchy and I don't care." Panos Katsaloulis describing me w.r.t. patents at discuss@linmodems.org - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/