linux-kernel - [PATCH v11 3/3] scsi: set max_bio

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Date:   Wed,  2 Jun 2021 21:10:37 +0900
From:   Changheun Lee <nanich.lee@...sung.com>
To:     hch@...radead.org, Johannes.Thumshirn@....com, alex_y_xu@...oo.ca,
        asml.silence@...il.com, axboe@...nel.dk, bgoncalv@...hat.com,
        bvanassche@....org, damien.lemoal@....com,
        gregkh@...uxfoundation.org, jaegeuk@...nel.org,
        linux-block@...r.kernel.org, linux-kernel@...r.kernel.org,
        ming.lei@...hat.com, osandov@...com, patchwork-bot@...nel.org,
        tj@...nel.org, tom.leiming@...il.com, yi.zhang@...hat.com
Cc:     jisoo2146.oh@...sung.com, junho89.kim@...sung.com,
        mj0123.lee@...sung.com, seunghwan.hyun@...sung.com,
        sookwan7.kim@...sung.com, woosung2.lee@...sung.com,
        yt0928.kim@...sung.com, Changheun Lee <nanich.lee@...sung.com>
Subject: [PATCH v11 3/3] scsi: set max_bio_bytes with queue max sectors

Set max_bio_bytes same with queue max sectors. It will lead to fast bio
submit when bio size is over than queue max sectors. And it might be helpful
to align submit bio size in some case.

Signed-off-by: Changheun Lee <nanich.lee@...sung.com>
---
 drivers/scsi/scsi_lib.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c
index 532304d42f00..f6269268b0e0 100644
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -1837,6 +1837,8 @@ void __scsi_init_queue(struct Scsi_Host *shost, struct request_queue *q)
 	blk_queue_virt_boundary(q, shost->virt_boundary_mask);
 	dma_set_max_seg_size(dev, queue_max_segment_size(q));
 
+	blk_queue_max_bio_bytes(q, queue_max_sectors(q));
+
 	/*
 	 * Set a reasonable default alignment:  The larger of 32-byte (dword),
 	 * which is a common minimum for HBAs, and the minimum DMA alignment,
-- 
2.29.0