LU-11372 o2iblnd: add clarifying comment to ko2iblnd.conf

The settings in ko2iblnd.conf are recommended only for
OPA but if other IB cards are present along with
OPA, then these settings are applied across all the
configured IB interfaces.

Change-Id: I6daf1f59a100db4e9c2cd12c255ad33fda274093
Test-Parameters: trivial
Signed-off-by: Sonia Sharma <sharmaso@whamcloud.com>
Reviewed-on: https://review.whamcloud.com/33163
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Amir Shehata <ashehata@whamcloud.com>
Reviewed-by: Doug Oucharek <dougso@me.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>

diff --git a/lustre/conf/ko2iblnd.conf b/lustre/conf/ko2iblnd.conf
index 3f0d28c..3d55009 100644 (file)
--- a/lustre/conf/ko2iblnd.conf
+++ b/lustre/conf/ko2iblnd.conf
@@ -1,8 +1,12 @@
 # Currently it isn't possible to auto-tune the o2iblnd parameters optimally
 # inside the kernel since the OFED API hides the details from us.
 # Unfortunately, there isn't a single set of parameters that provide optimal
-# performance on different HCA/HFI types, so this file provides optimized
-# tunables based on the installed IB interface cards.
+# performance on different HCA/HFI types. This file provides optimized
+# tunables for the OPA cards.
+#
+# ** Please note that the below settings are the recommended settings only for
+#    OPA cards. If other IB cards are also present along with OPA cards then
+#    these settings will be applied across all the configured IB interfaces.
 #
 # Card detection and tunable selection is handled via /usr/sbin/ko2iblnd-probe
 # at runtime when the ko2iblnd module is installed, either at boot or when