blk-wbt: don't throttle discard or write zeroes
Both of these are metadata only commands that are not issued by the
writeback code and not directly relevant to the writeback bandwith.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@fb.com>
diff --git a/block/blk-wbt.c b/block/blk-wbt.c
index d500e43..6e82769f 100644
--- a/block/blk-wbt.c
+++ b/block/blk-wbt.c
@@ -575,10 +575,9 @@ static inline bool wbt_should_throttle(struct rq_wb *rwb, struct bio *bio)
const int op = bio_op(bio);
/*
- * If not a WRITE (or a discard or write zeroes), do nothing
+ * If not a WRITE, do nothing
*/
- if (!(op == REQ_OP_WRITE || op == REQ_OP_DISCARD ||
- op == REQ_OP_WRITE_ZEROES))
+ if (op != REQ_OP_WRITE)
return false;
/*
