IB/ehca: Activate scaling code by default

Change ehca's Kconfig to activates scaling code as default.  After
several measurements we saw that this feature prevents dropped packets
(UD) in stress situation. Thus, enabling it helps to improve ehca's
bandwidth through IPoIB.

Signed-off-by: Hoang-Nam Nguyen <hnguyen@de.ibm.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>

diff --git a/drivers/infiniband/hw/ehca/Kconfig b/drivers/infiniband/hw/ehca/Kconfig
index 922389b643940f8d9dd11faae23ed82cf5714fd6..727b10d896868516e1776938ef5fdbafedd0cba7 100644 (file)
--- a/drivers/infiniband/hw/ehca/Kconfig
+++ b/drivers/infiniband/hw/ehca/Kconfig
@@ -10,6 +10,7 @@ config INFINIBAND_EHCA
 config INFINIBAND_EHCA_SCALING
        bool "Scaling support (EXPERIMENTAL)"
        depends on IBMEBUS && INFINIBAND_EHCA && HOTPLUG_CPU && EXPERIMENTAL
+       default y
        ---help---
        eHCA scaling support schedules the CQ callbacks to different CPUs.