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.
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