[openib-general] ib_unmap_fmr

[Roland Dreier]

    Sean> Got it.  I guess I need to look closer at the
    Sean> implementation.  Does the flushing occur when unmapped is
    Sean> called, or is the flushing done at some later point?  I was
    Sean> under the impression that it was the latter, but I could be
    Sean> wrong.

unmap is the flush operation.  One can also call map again on an fmr
without unmap it again, but the remap operation might leave the old
mapping in the HCA's context.

That's the tradeoff with this style of FMR: higher performance but
less protection.

 - R.