From: Kundan Kumar <kundan.kumar@xxxxxxxxxxx>
Even if BLK_CGROUP is enabled, it does not work for passthrough io.
So skip setting up blkg for passthrough bio.
Reduced processing gives ~5% hike in peak-performance workload.
Signed-off-by: Kundan Kumar <kundan.kumar@xxxxxxxxxxx>
Signed-off-by: Kanchan Joshi <joshi.k@xxxxxxxxxxx>
---
block/blk-cgroup.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/block/blk-cgroup.c b/block/blk-cgroup.c
index 4b48c2c44098..58b13ef23821 100644
--- a/block/blk-cgroup.c
+++ b/block/blk-cgroup.c
@@ -2064,6 +2064,9 @@ void bio_associate_blkg(struct bio *bio)
{
struct cgroup_subsys_state *css;
+ if (blk_op_is_passthrough(bio->bi_opf))
+ return;
+
rcu_read_lock();
if (bio->bi_blkg)
--
2.25.1
