linux-kernel - [PATCH 2.6.19 3/4] ehca: Kconfig: activate scaling code as default to prevent drop packets (UD)

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Message-Id: <200611052142.20577.hnguyen@de.ibm.com>
Date:	Sun, 5 Nov 2006 21:42:20 +0100
From:	Hoang-Nam Nguyen <hnguyen@...ibm.com>
To:	rolandd@...co.com
Cc:	linux-kernel@...r.kernel.org, linuxppc-dev@...abs.org,
	openib-general@...nib.org, raisch@...ibm.com
Subject: [PATCH 2.6.19 3/4] ehca: Kconfig: activate scaling code as default to prevent drop packets (UD)

Hello Roland!
Here is a small patch of ehca's Kconfig that activates scaling code as default.
After several measurements we saw that this feature prevents drop packets (UD)
in stress situation. Thus, enabling it helps to improve ehca's bandwidth through
ipoib.
Thanks!
Nam


Signed-off-by: Hoang-Nam Nguyen <hnguyen@...ibm.com>
---


 Kconfig |    1 +
 1 files changed, 1 insertion(+)


diff --git a/drivers/infiniband/hw/ehca/Kconfig b/drivers/infiniband/hw/ehca/Kconfig
index 922389b..727b10d 100644
--- 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.
 

View attachment "roland_svnehca_0018_kconfig.patch" of type "text/x-diff" (478 bytes)