diff mbox series

[v2,2/2] blk-throttle: only enable blk-stat when BLK_DEV_THROTTLING_LOW

Message ID 20230413062805.2081970-2-chengming.zhou@linux.dev (mailing list archive)
State New, archived
Headers show
Series [v2,1/2] blk-stat: fix QUEUE_FLAG_STATS clear | expand

Commit Message

Chengming Zhou April 13, 2023, 6:28 a.m. UTC 
From: Chengming Zhou <zhouchengming@bytedance.com>

blk_throtl_register() will unconditionally enable blk-stat for gendisk
when register, even when we have no BLK_DEV_THROTTLING_LOW config.

Since the kernel always has only BLK_DEV_THROTTLING config and the
BLK_DEV_THROTTLING_LOW config is still in EXPERIMENTAL state, we can
just skip blk-stat when !BLK_DEV_THROTTLING_LOW.

Signed-off-by: Chengming Zhou <zhouchengming@bytedance.com>
Acked-by: Tejun Heo <tj@kernel.org>
---
 block/blk-throttle.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/block/blk-throttle.c b/block/blk-throttle.c
index 47e9d8be68f3..3c07c9cfa70a 100644
--- a/block/blk-throttle.c
+++ b/block/blk-throttle.c
@@ -2439,11 +2439,12 @@  void blk_throtl_register(struct gendisk *disk)
 #ifndef CONFIG_BLK_DEV_THROTTLING_LOW
 	/* if no low limit, use previous default */
 	td->throtl_slice = DFL_THROTL_SLICE_HD;
-#endif
 
+#else
 	td->track_bio_latency = !queue_is_mq(q);
 	if (!td->track_bio_latency)
 		blk_stat_enable_accounting(q);
+#endif
 }
 
 #ifdef CONFIG_BLK_DEV_THROTTLING_LOW