aboutsummaryrefslogtreecommitdiffstats
path: root/block
diff options
context:
space:
mode:
authorRicky Benitez <rickyb@google.com>2010-04-05 18:22:17 +0200
committerJens Axboe <jens.axboe@oracle.com>2010-04-05 18:22:17 +0200
commita74b2adae06265b8cfa335d7d40d4a5abd11e977 (patch)
tree13f3204faa4fc4bef6270bfaa269ea45474c39f1 /block
parent144214537370b4f133a735446ebe86e90cfb2501 (diff)
downloadmrst-s0i3-test-a74b2adae06265b8cfa335d7d40d4a5abd11e977.tar.gz
mrst-s0i3-test-a74b2adae06265b8cfa335d7d40d4a5abd11e977.tar.xz
mrst-s0i3-test-a74b2adae06265b8cfa335d7d40d4a5abd11e977.zip
block: expose the statistics in blkio.time and blkio.sectors for the root cgroup
Currently, the io statistics for the root cgroup are maintained, but they are not shown because the device information is not available at the point that the root blkio cgroup is created. This patch updates the device information when the statistics are updated so that the statistics become visible. Signed-off-by: Ricky Benitez <rickyb@google.com> Acked-by: Vivek Goyal <vgoyal@redhat.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'block')
-rw-r--r--block/cfq-iosched.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c
index 2c7a0f4f3cd..7104ac816fb 100644
--- a/block/cfq-iosched.c
+++ b/block/cfq-iosched.c
@@ -948,6 +948,11 @@ cfq_find_alloc_cfqg(struct cfq_data *cfqd, struct cgroup *cgroup, int create)
unsigned int major, minor;
cfqg = cfqg_of_blkg(blkiocg_lookup_group(blkcg, key));
+ if (cfqg && !cfqg->blkg.dev && bdi->dev && dev_name(bdi->dev)) {
+ sscanf(dev_name(bdi->dev), "%u:%u", &major, &minor);
+ cfqg->blkg.dev = MKDEV(major, minor);
+ goto done;
+ }
if (cfqg || !create)
goto done;