linux-kernel - [PATCH 2/6] block: don't pass BIOSET_NEED_BVECS for q->bio

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Message-Id: <20201230003255.3450874-3-ming.lei@redhat.com>
Date:   Wed, 30 Dec 2020 08:32:51 +0800
From:   Ming Lei <ming.lei@...hat.com>
To:     Jens Axboe <axboe@...nel.dk>
Cc:     linux-block@...r.kernel.org, Christoph Hellwig <hch@....de>,
        linux-kernel@...r.kernel.org, Ming Lei <ming.lei@...hat.com>
Subject: [PATCH 2/6] block: don't pass BIOSET_NEED_BVECS for q->bio_split

q->bio_split is only used by bio_split() for fast cloning bio, and no
need to allocate bvecs, so remove this flag.

Signed-off-by: Ming Lei <ming.lei@...hat.com>
---
 block/blk-core.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/block/blk-core.c b/block/blk-core.c
index 96e5fcd7f071..3480ca037d3f 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -530,7 +530,7 @@ struct request_queue *blk_alloc_queue(int node_id)
 	if (q->id < 0)
 		goto fail_q;
 
-	ret = bioset_init(&q->bio_split, BIO_POOL_SIZE, 0, BIOSET_NEED_BVECS);
+	ret = bioset_init(&q->bio_split, BIO_POOL_SIZE, 0, 0);
 	if (ret)
 		goto fail_id;
 
-- 
2.28.0