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

Timur Tabi
2005-04-18T16:10:38Z

Roland Dreier wrote:
> Troy> How is memory pinning handled? (I haven't had time to read
> Troy> all the code, so please excuse my ignorance of something
> Troy> obvious).
>
> The userspace library calls mlock() and then the kernel does
> get_user_pages().

Why do you call mlock() and get_user_pages()? In our code, we only call mlock(), and the
memory is pinned. We have a test case that fails if only get_user_pages() is called, but
it passes if only mlock() is called.

--
Timur Tabi
Staff Software Engineer
timur.tabi@ammasso.com