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

[Pavel Machek]

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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