config IOSCHED_CFQ
tristate "CFQ I/O scheduler"
- select BLK_CGROUP if CFQ_GROUP_IOSCHED
+ # 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
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 && CGROUPS
+ depends on IOSCHED_CFQ && 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