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

Pavel Machek
2005-04-22T08:19:44Z

Hi!

> > Timur> Why do you call mlock() and get_user_pages()? In our
> > code,
> > Timur> we only call mlock(), and the memory is pinned. We have a
> > Timur> test case that fails if only get_user_pages() is called,
> > Timur> but it passes if only mlock() is called.
> >
> >What if a buggy/malicious userspace program doesn't call mlock()?
>
> Our library calls mlock() when the apps requests memory to be
> "registered". We then call munlock() when the app requests the
> memory to be unregistered. All apps talk to our library for all
> services. No apps talk to the driver directly.

That does not cover "malicious" part.
Pavel
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