[openib-general] Re: [PATCH][RFC][0/4] InfiniBand userspace verbs implementation

[Andrew Morton]

Arjan van de Ven <arjan at infradead.org> wrote:
>
> > Why do you call mlock() and get_user_pages()?  In our code, we only call mlock(), and the 
> > memory is pinned. 
> 
> this is a myth; linux is free to move the page about in physical memory
> even if it's mlock()ed!!

eh?  I guess the kernel _is_ free to move the page about, but it doesn't.

We might do at some time in the future for memory hotplug, I guess.