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-rw-r--r--block/blk-throttle.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/block/blk-throttle.c b/block/blk-throttle.c
index 847721dc2b2b..8e2349b17936 100644
--- a/block/blk-throttle.c
+++ b/block/blk-throttle.c
@@ -395,8 +395,9 @@ static void throtl_pd_init(struct blkg_policy_data *pd)
* If on the default hierarchy, we switch to properly hierarchical
* behavior where limits on a given throtl_grp are applied to the
* whole subtree rather than just the group itself. e.g. If 16M
- * read_bps limit is set on the root group, the whole system can't
- * exceed 16M for the device.
+ * read_bps limit is set on a parent group, summary bps of
+ * parent group and its subtree groups can't exceed 16M for the
+ * device.
*
* If not on the default hierarchy, the broken flat hierarchy
* behavior is retained where all throtl_grps are treated as if