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

Roland Dreier
2005-04-11T17:21:07Z

Troy> Is there a check in the kernel that the memory is actually
Troy> mlock()ed?

No.

Troy> What if a malicious (or broken) application does
Troy> ibv_reg_mr() but doesn't lock the memory? Does the IB card
Troy> get a physical address for a page that might get swapped
Troy> out?

No, the kernel does get_user_pages(). So the pages that the HCA gets
will not be swapped or used for anything else. The only thing a
malicious userspace app can do is screw itself up.

- R.