Re: [patch 0/5] Support for sanitization flag in low-level pageallocator

[Alan Cox]

> > As for being swapped out - I do not believe that kernel stacks can 
> > ever be swapped out in Linux.
> 
> yes, i referred to that as an undesirable option - because it slows 
> down pthread_create() quite substantially.
> 
> This needs before/after pthread_create() benchmark results.

kernel stacks can end up places you don't expect on hypervisor based
systems.

In most respects the benchmarks are pretty irrelevant - wiping stuff has
a performance cost, but its the sort of thing you only want to do when
you have a security requirement that needs it. At that point the
performance is secondary.

Alan
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