Re: mbind and alignment

[Andi Kleen]

> 
> So one of those should probably be done to free people from headaches:
> 
> - document "start" requirement in the manual page
> - require len to be aligned too, and document the requirements in the
>   manual page
> - drop the "start" requirement and just round down the page + adjust
>   size automatically.

This annoyed me in the past too. The kernel should have done that alignment
by itself. But changing it now would be a bad idea because it would
produce programs that run on newer kernels but break on olders.
Documenting it is the only sane option left.

-Andi
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