Re: Wanted: simple, safe x86 stack overflow detection

[Arjan van de Ven]

> I'm certainly in favor of the move; IRQ stacks could be made
> rather deep and cheaply at that. I may get around to writing it this
> week if no one else does it first.

the irq stacks aren't the problem; RH at some point accidentally shipped
a kernel with 4k *shared* irq/user context stack and even that gave
almost no issues.

irq's really shouldn't actually nest; it's bad for just about everything
to do that (but that's another story, I would *love* to get rid of the
"enable irqs" thing in the x86 irq path, it hurts just about anything in
reality)

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