tree 02d0af0c74dc1e7ef99d2798d4b5e0a375b4deb8
parent 7c3edd3ff3098093e594dbcbc9dbeeae09b1b4a0
author Mike Marciniszyn <mike.marciniszyn@qlogic.com> 1294710142 -0800
committer Roland Dreier <rolandd@cisco.com> 1294710142 -0800

IB/qib: RDMA lkey/rkey validation is inefficient for large MRs

The current code loops during rkey/lkey validiation to isolate the MR
for the RDMA, which is expensive when the current operation is inside
a very large memory region.

This fix optimizes rkey/lkey validation routines for user memory
regions and fast memory regions.  The MR entry can be isolated by
shifts/mods instead of looping.  The existing loop is preserved for
phys memory regions for now.

Signed-off-by: Mike Marciniszyn <mike.marciniszyn@qlogic.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>