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authorVivek Goyal2010-04-26 12:27:56 -0500
committerJens Axboe2010-04-26 12:27:56 -0500
commitafc24d49c1e5dbeef745c1c1246f5ae6ebd97c71 (patch)
treec936676ed21d032bf1d27f9ff1451f6242c8b3b6 /block/Kconfig
parente5ff082e8a68d9a6874990597497c7e6a96ad752 (diff)
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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 'block/Kconfig')
-rw-r--r--block/Kconfig23
1 files changed, 0 insertions, 23 deletions
diff --git a/block/Kconfig b/block/Kconfig
index f9e89f4d94b..9be0b56eaee 100644
--- a/block/Kconfig
+++ b/block/Kconfig
@@ -77,29 +77,6 @@ config BLK_DEV_INTEGRITY
77 T10/SCSI Data Integrity Field or the T13/ATA External Path 77 T10/SCSI Data Integrity Field or the T13/ATA External Path
78 Protection. If in doubt, say N. 78 Protection. If in doubt, say N.
79 79
80config BLK_CGROUP
81 tristate "Block cgroup support"
82 depends on CGROUPS
83 depends on CFQ_GROUP_IOSCHED
84 default n
85 ---help---
86 Generic block IO controller cgroup interface. This is the common
87 cgroup interface which should be used by various IO controlling
88 policies.
89
90 Currently, CFQ IO scheduler uses it to recognize task groups and
91 control disk bandwidth allocation (proportional time slice allocation)
92 to such task groups.
93
94config DEBUG_BLK_CGROUP
95 bool
96 depends on BLK_CGROUP
97 default n
98 ---help---
99 Enable some debugging help. Currently it stores the cgroup path
100 in the blk group which can be used by cfq for tracing various
101 group related activity.
102
103endif # BLOCK 80endif # BLOCK
104 81
105config BLOCK_COMPAT 82config BLOCK_COMPAT