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| author |   Tejun Heo <tj@kernel.org> | 2012-03-05 13:15:11 -0800 |
|---|---|---|
| committer |   Jens Axboe <axboe@kernel.dk> | 2012-03-06 21:27:23 +0100 |
| commit | 7ee9c5620504906e98451dc9a1945b2b9e892cb8 (patch) | |
| tree | 1daf4d9fc8d03ebbc88ceedb7abeec46d8c71df3 /block/blk-cgroup.h | |
| parent | blkcg: skip blkg printing if q isn't associated with disk (diff) | |
| download | linux-dev-7ee9c5620504906e98451dc9a1945b2b9e892cb8.tar.xz linux-dev-7ee9c5620504906e98451dc9a1945b2b9e892cb8.zip | |
blkcg: let blkio_group point to blkio_cgroup directly
Currently, blkg points to the associated blkcg via its css_id. This
unnecessarily complicates dereferencing blkcg. Let blkg hold a
reference to the associated blkcg and point directly to it and disable
css_id on blkio_subsys.
This change requires splitting blkiocg_destroy() into
blkiocg_pre_destroy() and blkiocg_destroy() so that all blkg's can be
destroyed and all the blkcg references held by them dropped during
cgroup removal.
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.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/block/blk-cgroup.h b/block/blk-cgroup.h index 7ebecf6ea8f1..ca1fc637bd6e 100644 --- a/block/blk-cgroup.h +++ b/block/blk-cgroup.h @@ -163,7 +163,7 @@ struct blkio_group { /* Pointer to the associated request_queue, RCU protected */ struct request_queue __rcu *q; struct hlist_node blkcg_node; - unsigned short blkcg_id; + struct blkio_cgroup *blkcg; /* Store cgroup path */ char path[128]; /* policy which owns this blk group */ |