From: Fabio Checconi <fchecc...@gmail.com>
Add the CGROUP_BFQIO option to Kconfig.iosched. This option allows
full hierarchical support to be enabled in BFQ, and the bfqio
controller to be added to the cgroups interface.
Signed-off-by: Fabio Checconi <fchecc...@gmail.com>
Signed-off-by: Paolo Valente <paolo.vale...@unimore.it>
Signed-off-by: Arianna Avanzini <avanzini.aria...@gmail.com>
---
block/Kconfig.iosched | 13 ++++++++++++-
1 file changed, 12 insertions(+), 1 deletion(-)
diff --git a/block/Kconfig.iosched b/block/Kconfig.iosched
index 8f98cc7..a3675cb 100644
--- a/block/Kconfig.iosched
+++ b/block/Kconfig.iosched
@@ -46,7 +46,18 @@ config IOSCHED_BFQ
The BFQ I/O scheduler tries to distribute bandwidth among all
processes according to their weights.
It aims at distributing the bandwidth as desired, regardless
- of the disk parameters and with any workload.
+ of the disk parameters and with any workload. If compiled
+ built-in (saying Y here), BFQ can be configured to support
+ hierarchical scheduling.
+
+config CGROUP_BFQIO
+ bool "BFQ hierarchical scheduling support"
+ depends on CGROUPS && IOSCHED_BFQ=y
+ default n
+ ---help---
+ Enable hierarchical scheduling in BFQ, using the cgroups
+ filesystem interface. The name of the subsystem will be
+ bfqio.
choice
prompt "Default I/O scheduler"
--
1.9.2
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