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authorTejun Heo <tj@kernel.org>2012-03-05 13:15:28 -0800
committerJens Axboe <axboe@kernel.dk>2012-03-06 21:27:24 +0100
commit4f85cb96d9d2fbbb7160db855a6beee1baced5e5 (patch)
tree5472bba04490da05fa6ca8f780431b37bd7375cb /block/blk-throttle.c
parent852c788f8365062c8a383c5a93f7f7289977cb50 (diff)
downloadlwn-4f85cb96d9d2fbbb7160db855a6beee1baced5e5.tar.gz
lwn-4f85cb96d9d2fbbb7160db855a6beee1baced5e5.zip
block: make block cgroup policies follow bio task association
Implement bio_blkio_cgroup() which returns the blkcg associated with the bio if exists or %current's blkcg, and use it in blk-throttle and cfq-iosched propio. This makes both cgroup policies honor task association for the bio instead of always assuming %current. As nobody is using bio_set_task() yet, this doesn't introduce any behavior change. 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-throttle.c')
-rw-r--r--block/blk-throttle.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/block/blk-throttle.c b/block/blk-throttle.c
index bfa5168249eb..08b7ab292a80 100644
--- a/block/blk-throttle.c
+++ b/block/blk-throttle.c
@@ -900,7 +900,7 @@ bool blk_throtl_bio(struct request_queue *q, struct bio *bio)
* just update the dispatch stats in lockless manner and return.
*/
rcu_read_lock();
- blkcg = task_blkio_cgroup(current);
+ blkcg = bio_blkio_cgroup(bio);
tg = throtl_lookup_tg(td, blkcg);
if (tg) {
if (tg_no_rule_group(tg, rw)) {