UBUNTU: Ubuntu-2.6.38-12.51

[linux-flexiantxendom0-natty.git] / block / Kconfig.iosched

diff --git a/block/Kconfig.iosched b/block/Kconfig.iosched
index baad3da..3199b76 100644 (file)
--- a/block/Kconfig.iosched
+++ b/block/Kconfig.iosched
@@ -23,13 +23,26 @@ config IOSCHED_DEADLINE
 
 config IOSCHED_CFQ
        tristate "CFQ I/O scheduler"
+       # If BLK_CGROUP is a module, CFQ has to be built as module.
+       depends on (BLK_CGROUP=m && m) || !BLK_CGROUP || BLK_CGROUP=y
        default y
        ---help---
          The CFQ I/O scheduler tries to distribute bandwidth equally
          among all processes in the system. It should provide a fair
-         working environment, suitable for desktop systems.
+         and low latency working environment, suitable for both desktop
+         and server systems.
+
          This is the default I/O scheduler.
 
+         Note: If BLK_CGROUP=m, then CFQ can be built only as module.
+
+config CFQ_GROUP_IOSCHED
+       bool "CFQ Group Scheduling support"
+       depends on IOSCHED_CFQ && BLK_CGROUP
+       default n
+       ---help---
+         Enable group IO scheduling in CFQ.
+
 choice
        prompt "Default I/O scheduler"
        default DEFAULT_CFQ