Messages in this thread | | | Subject | Re: [PATCH][RFC][0/4] InfiniBand userspace verbs implementation | From | Roland Dreier <> | Date | Mon, 11 Apr 2005 09:56:53 -0700 |
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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.
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