From: Mike Marciniszyn <mike.marciniszyn@intel.com>
Date: Wed, 27 Jun 2012 22:33:19 +0000 (-0400)
Subject: IB/qib: RCU locking for MR validation
X-Git-Tag: v3.6-rc1~115^2^7~6
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8aac4cc3a9d7;p=pandora-kernel.git

IB/qib: RCU locking for MR validation

Profiling indicates that MR validation locking is expensive.  The MR
table is largely read-only and is a suitable candidate for RCU locking.

The patch uses RCU locking during validation to eliminate one
lock/unlock during that validation.

Reviewed-by: Mike Heinz <michael.william.heinz@intel.com>
Signed-off-by: Mike Marciniszyn <mike.marciniszyn@intel.com>
Signed-off-by: Roland Dreier <roland@purestorage.com>
---

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