Re: 4k stacks in 2.6

[Linus Torvalds]

On Thu, 27 May 2004, Andrea Arcangeli wrote:
>
> On Thu, May 27, 2004 at 10:18:40AM -0400, Brian Gerst wrote:
> > The problem on i386 (unlike x86-64) is that the thread_info struct sits 
> > at the bottom of the stack and is referenced by masking bits off %esp. 
> > So the stack size must be constant whether in process context or IRQ 
> > context.
> 
> so what, that's a minor implementation detail, pda is a software thing.

"minor implementation detail"?

You need to get to the thread info _some_ way, and you need to get to it
_fast_. There are really no sane alternatives. I certainly do not want to
play games with segments.

		Linus
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