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authorTejun Heo <tj@kernel.org>2015-05-23 00:13:36 +0300
committerJens Axboe <axboe@fb.com>2015-06-02 17:33:35 +0300
commit89e9b9e07a390c50980d10aa37a04631db5a23ab (patch)
tree194810fa9bd85a9d0e3145eeafc4a305057757f8 /block
parent4aa9c692e052cf6db99db62a8fe0543e5c455da7 (diff)
downloadlinux-89e9b9e07a390c50980d10aa37a04631db5a23ab.tar.xz
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 'block')
-rw-r--r--block/blk-core.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/block/blk-core.c b/block/blk-core.c
index c3ba9c3b08d4..c114a61590bc 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -621,7 +621,7 @@ struct request_queue *blk_alloc_queue_node(gfp_t gfp_mask, int node_id)
q->backing_dev_info.ra_pages =
(VM_MAX_READAHEAD * 1024) / PAGE_CACHE_SIZE;
- q->backing_dev_info.capabilities = 0;
+ q->backing_dev_info.capabilities = BDI_CAP_CGROUP_WRITEBACK;
q->backing_dev_info.name = "block";
q->node = node_id;