[openib-general] Question about pinning memory

[Roland Dreier]

    Gleb> Can you elaborate on kernel upcalls mechanism?

Not sure what you mean by the question.  I was just trying to say that
in general when the kernel has some information it wants to push to
userspace, it's probably best for userspace to get it via a read() on
a file descriptor rather than for the kernel to queue a signal.

    Gleb> This is responsibility of the user to make sure he is not
    Gleb> unmaps or frees memory that is currently in use.

Any registration caching scheme has to deal with a user using memory
X, freeing memory X, and then allocating memory Y at the same virtual
address as X.

 - R.