[openib-general] Re: [PATCH] Ref count user doorbell pages in mthca

[Roland Dreier]

    Michael> Looking at code under mm/, it seems that when you mmap
    Michael> something, get_file is called on the descriptor (and fput
    Michael> on close).  So it seems to me the driver's release wont
    Michael> get called until the app actually unmaps the memory.  If
    Michael> thats right, there's no issue since the context wont get
    Michael> closed.

You may be right.  I need to investigate what happens if a process
with a UAR mapped forks though.

 - R.