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SubjectRe: [PATCH] cache colour task_structs
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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.

Just don't forget to teach ptrace and proc WCHAN and oops printing about it;
they currently use hardcoded stack offsets. It'll also likely break kdb.

-Andi
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