blkio: Add more debug-only per-cgroup stats

[safe/jmp/linux-2.6] / block / Kconfig.iosched

diff --git a/block/Kconfig.iosched b/block/Kconfig.iosched
index fa95fa7..fc71cf0 100644 (file)
--- a/block/Kconfig.iosched
+++ b/block/Kconfig.iosched
@@ -23,6 +23,7 @@ config IOSCHED_DEADLINE
 
 config IOSCHED_CFQ
        tristate "CFQ I/O scheduler"
+       select BLK_CGROUP if CFQ_GROUP_IOSCHED
        default y
        ---help---
          The CFQ I/O scheduler tries to distribute bandwidth equally
@@ -35,11 +36,19 @@ config IOSCHED_CFQ
 config CFQ_GROUP_IOSCHED
        bool "CFQ Group Scheduling support"
        depends on IOSCHED_CFQ && CGROUPS
-       select BLK_CGROUP
        default n
        ---help---
          Enable group IO scheduling in CFQ.
 
+config DEBUG_CFQ_IOSCHED
+       bool "Debug CFQ Scheduling"
+       depends on CFQ_GROUP_IOSCHED
+       select DEBUG_BLK_CGROUP
+       default n
+       ---help---
+         Enable CFQ IO scheduling debugging in CFQ. Currently it makes
+         blktrace output more verbose.
+
 choice
        prompt "Default I/O scheduler"
        default DEFAULT_CFQ