From: Mike Marciniszyn <mike.marciniszyn@qlogic.com>
Date: Tue, 11 Jan 2011 01:42:22 +0000 (-0800)
Subject: IB/qib: RDMA lkey/rkey validation is inefficient for large MRs
X-Git-Tag: v2.6.38-rc1~406^2^7~4
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=2a600f14d25fda341b5633c75cc50a7574fc1007;p=pandora-kernel.git

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>
---

Reading git-diff-tree failed