From: Christoph Hellwig <hch@lst.de>
Date: Fri, 9 Dec 2016 13:19:06 +0000 (+0100)
Subject: blk-wbt: don't throttle discard or write zeroes
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=be07e14f96e3121483339a64d917fddb3b86ba98;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

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 d500e43da5d9..6e82769f4042 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;
 
 	/*