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 <[email protected]> Signed-off-by: Jens Axboe <[email protected]>
ambv · Dec 9, 2016 · be07e14 · be07e14
1 parent a897b66
commit be07e14
Showing 1 changed file with 2 additions and 3 deletions.
diff --git 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;
 
 	/*