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authorTejun Heo <tj@kernel.org>2015-05-22 17:13:36 -0400
committerJens Axboe <axboe@fb.com>2015-06-02 08:33:35 -0600
commit89e9b9e07a390c50980d10aa37a04631db5a23ab (patch)
tree194810fa9bd85a9d0e3145eeafc4a305057757f8 /init
parent4aa9c692e052cf6db99db62a8fe0543e5c455da7 (diff)
downloadlinux-linaro-stable-89e9b9e07a390c50980d10aa37a04631db5a23ab.tar.gz
writeback: add {CONFIG|BDI_CAP|FS}_CGROUP_WRITEBACK
cgroup writeback requires support from both bdi and filesystem sides. Add BDI_CAP_CGROUP_WRITEBACK and FS_CGROUP_WRITEBACK to indicate support and enable BDI_CAP_CGROUP_WRITEBACK on block based bdi's by default. Also, define CONFIG_CGROUP_WRITEBACK which is enabled if both MEMCG and BLK_CGROUP are enabled. inode_cgwb_enabled() which determines whether a given inode's both bdi and fs support cgroup writeback is added. Signed-off-by: Tejun Heo <tj@kernel.org> Cc: Jens Axboe <axboe@kernel.dk> Cc: Jan Kara <jack@suse.cz> Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'init')
-rw-r--r--init/Kconfig5
1 files changed, 5 insertions, 0 deletions
diff --git a/init/Kconfig b/init/Kconfig
index dc24dec60232..d4f763332f9f 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -1141,6 +1141,11 @@ config DEBUG_BLK_CGROUP
Enable some debugging help. Currently it exports additional stat
files in a cgroup which can be useful for debugging.
+config CGROUP_WRITEBACK
+ bool
+ depends on MEMCG && BLK_CGROUP
+ default y
+
endif # CGROUPS
config CHECKPOINT_RESTORE