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authorTejun Heo <tj@kernel.org>2012-03-19 15:10:56 -0700
committerJens Axboe <axboe@kernel.dk>2012-03-20 12:47:47 +0100
commit9a9e8a26da4c2c5ddc60999bdea957935fb22b6b (patch)
tree5a42ef29c2c34174390e4ccf9a2924c0ade6f340 /block/blk-cgroup.h
parentedf1b879e308d37b5b7c414476ab39f79650a253 (diff)
downloadop-kernel-dev-9a9e8a26da4c2c5ddc60999bdea957935fb22b6b.zip
op-kernel-dev-9a9e8a26da4c2c5ddc60999bdea957935fb22b6b.tar.gz
blkcg: add blkcg->id
Add 64bit unique id to blkcg. This will be used by policies which want blkcg identity test to tell whether the associated blkcg has changed. Signed-off-by: Tejun Heo <tj@kernel.org> Cc: Vivek Goyal <vgoyal@redhat.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/blk-cgroup.h')
-rw-r--r--block/blk-cgroup.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/block/blk-cgroup.h b/block/blk-cgroup.h
index 9df5ab0..1cb8f76 100644
--- a/block/blk-cgroup.h
+++ b/block/blk-cgroup.h
@@ -116,6 +116,9 @@ struct blkio_cgroup {
unsigned int weight;
spinlock_t lock;
struct hlist_head blkg_list;
+
+ /* for policies to test whether associated blkcg has changed */
+ uint64_t id;
};
struct blkio_group_stats {
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