Quoting r. Roland Dreier <[EMAIL PROTECTED]>: > Subject: Re: [PATCH 11/16] IB uverbs: add mthca mmap support > > Andrew> What's the thinking behind the VM_DONTCOPY there? > > As I said before, I don't think the thinking behind VM_DONTCOPY was > correct thinking. Let's take it out.
Roland, I think VM_DONTCOPY is needed here. If a process forks, we must prevent the child from accessing the parent's hardware page. Otherwise the child can corrupt the parent's queues since the hardware wont be able to distinguish between parent and child. Does this make sense? -- MST _______________________________________________ openib-general mailing list openib-general@openib.org http://openib.org/mailman/listinfo/openib-general To unsubscribe, please visit http://openib.org/mailman/listinfo/openib-general
