dm mpath: add queue length load balancer

[mv-sheeva.git] / drivers / md / Kconfig

diff --git a/drivers/md/Kconfig b/drivers/md/Kconfig
index 36e0675be9f72fe5793687c85c3ed0d7db67efae..3b311d273346b8ba258951d3c5afe3f957b671f6 100644 (file)
--- a/drivers/md/Kconfig
+++ b/drivers/md/Kconfig
@@ -249,6 +249,15 @@ config DM_MULTIPATH
        ---help---
          Allow volume managers to support multipath hardware.
 
+config DM_MULTIPATH_QL
+       tristate "I/O Path Selector based on the number of in-flight I/Os"
+       depends on DM_MULTIPATH
+       ---help---
+         This path selector is a dynamic load balancer which selects
+         the path with the least number of in-flight I/Os.
+
+         If unsure, say N.
+
 config DM_DELAY
        tristate "I/O delaying target (EXPERIMENTAL)"
        depends on BLK_DEV_DM && EXPERIMENTAL