From: Liu Song <liusong@xxxxxxxxxxxxxxxxx>
BIO_WORKINGSET is rarer than read, so adjust to the first one to judge.
Signed-off-by: Liu Song <liusong@xxxxxxxxxxxxxxxxx>
---
block/blk-core.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/block/blk-core.c b/block/blk-core.c
index 06ff5bb..7b6809b 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -901,8 +901,8 @@ void submit_bio(struct bio *bio)
* the submitting cgroup IO-throttled, submission can be a significant
* part of overall IO time.
*/
- if (unlikely(bio_op(bio) == REQ_OP_READ &&
- bio_flagged(bio, BIO_WORKINGSET))) {
+ if (unlikely(bio_flagged(bio, BIO_WORKINGSET) &&
+ bio_op(bio) == REQ_OP_READ)) {
unsigned long pflags;
psi_memstall_enter(&pflags);
--
1.8.3.1
