[openib-general] [PATCH 1/2] mthca support for max_map_per_fmr device attribute

[Roland Dreier]

    Or> When "requests" come fast enough, there's a window in time
    Or> when there's an unmapping of N FMRs running at batch, but out
    Or> of the remaining N FMRs some are already dirty and can't be
    Or> used to serve a credit. So the app fails temporally... So,
    Or> setting the watermark to 0.5N might solve this, but since
    Or> enlarging the number of remaps is trivial, i'd like to do it
    Or> first.

I don't quite understand how increasing the max remap count really
helps you that much.  Increasing it would just make this failure less
frequent, but it would still occur, right?

 - R.