From: Yu Kuai <yukuai3@xxxxxxxxxx>
wbt can never be enabled or disabled while io is still inflight.
Signed-off-by: Yu Kuai <yukuai3@xxxxxxxxxx>
---
block/blk-wbt.c | 16 ----------------
1 file changed, 16 deletions(-)
diff --git a/block/blk-wbt.c b/block/blk-wbt.c
index 2d5a2f4ee8bc..247f27a15062 100644
--- a/block/blk-wbt.c
+++ b/block/blk-wbt.c
@@ -200,15 +200,6 @@ static void wbt_rqw_done(struct rq_wb *rwb, struct rq_wait *rqw,
inflight = atomic_dec_return(&rqw->inflight);
- /*
- * wbt got disabled with IO in flight. Wake up any potential
- * waiters, we don't have to do more than that.
- */
- if (unlikely(!rwb_enabled(rwb))) {
- rwb_wake_all(rwb);
- return;
- }
-
/*
* For discards, our limit is always the background. For writes, if
* the device does write back caching, drop further down before we
@@ -544,13 +535,6 @@ static inline unsigned int get_limit(struct rq_wb *rwb, blk_opf_t opf)
{
unsigned int limit;
- /*
- * If we got disabled, just return UINT_MAX. This ensures that
- * we'll properly inc a new IO, and dec+wakeup at the end.
- */
- if (!rwb_enabled(rwb))
- return UINT_MAX;
-
if ((opf & REQ_OP_MASK) == REQ_OP_DISCARD)
return rwb->wb_background;
--
2.31.1
