Re: [2.6 patch] i386: always use 4k stacks

From: Andi Kleen
Date: Thu Nov 17 2005 - 09:42:12 EST

On Wednesday 16 November 2005 20:03, Benjamin LaHaise wrote:
> On Wed, Nov 16, 2005 at 07:45:08PM +0100, Adrian Bunk wrote:
> > The problem is similar no matter whether you have 4k or 8k stacks, but
> > with 4k stacks you have the additional benefits of order 0 allocations
> > and less memory usage.
> We could implement a stack guard page for the transition period, so that
> any stack overflows would end up generating a fault. That's easy enough
> to do by using vmalloc()

And would add considerable overhead in TLB flushes and locking ...

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