[openib-general] [PATCH] mthca: fix registration for giant MRs

[Roland Dreier]

    Grant> There is a limit on some platforms: IO Virtual Address
    Grant> (IOVA) space

You're right -- I wasn't precise in my previous email.  All my patch
tries to do is remove arbitrary limitations caused by mthca insisting
on allocating contiguous memory for no good reason.

As you alluded to, some pSeries machines have extremely limited IOMMU
resources and the amount of memory that can be registered at any one
time may be severely limited.

 - R.