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SubjectRe: [PATCH] cache colour task_structs
On 1 Nov 2001, Andi Kleen wrote:

> Alan Cox <alan@lxorguk.ukuu.org.uk> writes:
> >
> > We need to perturb esp colour too. It might be the right way to do this
> > is slab based kernel stacks, it might be that your code is cheaper than
> > the cost of getting current the really hard way and we should just add
> > random numbers to the initial esp of a task ?
>
> You could do that even today (without slab task_struct) by using a
> random/coloured at fork time value for esp0. This could just be a static
> colour counter that is subtracted.

Hey, ... I do that in userspace at thread creation time with a random
alloca(), ... but it's to prevent stack pointer guessing in case of buffer
overflows :)




- Davide


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