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authorVivek Goyal <vgoyal@redhat.com>2010-04-26 13:27:56 -0400
committerJens Axboe <jens.axboe@oracle.com>2010-04-26 13:27:56 -0400
commitafc24d49c1e5dbeef745c1c1246f5ae6ebd97c71 (patch)
treec936676ed21d032bf1d27f9ff1451f6242c8b3b6 /init
parente5ff082e8a68d9a6874990597497c7e6a96ad752 (diff)
blk-cgroup: config options re-arrangement
This patch fixes few usability and configurability issues. o All the cgroup based controller options are configurable from "Genral Setup/Control Group Support/" menu. blkio is the only exception. Hence make this option visible in above menu and make it configurable from there to bring it inline with rest of the cgroup based controllers. o Get rid of CONFIG_DEBUG_CFQ_IOSCHED. This option currently does two things. - Enable printing of cgroup paths in blktrace - Enables CONFIG_DEBUG_BLK_CGROUP, which in turn displays additional stat files in cgroup. If we are using group scheduling, blktrace data is of not really much use if cgroup information is not present. To get this data, currently one has to also enable CONFIG_DEBUG_CFQ_IOSCHED, which in turn brings the overhead of all the additional debug stat files which is not desired. Hence, this patch moves printing of cgroup paths under CONFIG_CFQ_GROUP_IOSCHED. This allows us to get rid of CONFIG_DEBUG_CFQ_IOSCHED completely. Now all the debug stat files are controlled only by CONFIG_DEBUG_BLK_CGROUP which can be enabled through config menu. Signed-off-by: Vivek Goyal <vgoyal@redhat.com> Acked-by: Divyesh Shah <dpshah@google.com> Reviewed-by: Gui Jianfeng <guijianfeng@cn.fujitsu.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'init')
-rw-r--r--init/Kconfig27
1 files changed, 27 insertions, 0 deletions
diff --git a/init/Kconfig b/init/Kconfig
index eb77e8ccde1c..087c14f3c595 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -612,6 +612,33 @@ config RT_GROUP_SCHED
612 612
613endif #CGROUP_SCHED 613endif #CGROUP_SCHED
614 614
615config BLK_CGROUP
616 tristate "Block IO controller"
617 depends on CGROUPS && BLOCK
618 default n
619 ---help---
620 Generic block IO controller cgroup interface. This is the common
621 cgroup interface which should be used by various IO controlling
622 policies.
623
624 Currently, CFQ IO scheduler uses it to recognize task groups and
625 control disk bandwidth allocation (proportional time slice allocation)
626 to such task groups.
627
628 This option only enables generic Block IO controller infrastructure.
629 One needs to also enable actual IO controlling logic in CFQ for it
630 to take effect. (CONFIG_CFQ_GROUP_IOSCHED=y).
631
632 See Documentation/cgroups/blkio-controller.txt for more information.
633
634config DEBUG_BLK_CGROUP
635 bool "Enable Block IO controller debugging"
636 depends on BLK_CGROUP
637 default n
638 ---help---
639 Enable some debugging help. Currently it exports additional stat
640 files in a cgroup which can be useful for debugging.
641
615endif # CGROUPS 642endif # CGROUPS
616 643
617config MM_OWNER 644config MM_OWNER