[openib-general] Re: RDMA memory registration

[Roland Dreier]

    Bill> Are you suggesting making the partial pages their own VMA,
    Bill> or marking the entire buffer with this flag? I originally
    Bill> thought the entire buffer should be copy on fork (instead of
    Bill> copy on write), and I believe this is the path Mellanox was
    Bill> pursing with the VM_NO_COW flag.  However, if applications
    Bill> are registering gigs of ram, it would be very bad to have
    Bill> the entire area copied on fork.

It's up to userspace really but I would expect that the partial pages
would be in a vma by themselves.

 - R.