Re: 4k stacks in 2.6

[Andrea Arcangeli]

On Thu, May 27, 2004 at 02:45:51PM +0200, Ingo Molnar wrote:
> are a bit belated. I only reacted to Andrea's mail to clear up apparent
> misunderstandings about the impact and implementation of this feature.

note that there is something relevant to improve in the implementation,
that is the per-cpu irq stack size should be bigger than 4k, we use 16k
on x86-64, on x86 it should be 8k. Currently you're decreasing _both_
the normal kernel context and even the irq stack in some condition.
There's no good reason to decrease the irq stack too, that's cheap, it's
per-cpu.
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