linux-kernel - [PATCH 1/2] nvme: set io-scheduler requirement for ZNS

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Message-Id: <20200818052936.10995-2-joshi.k@samsung.com>
Date:   Tue, 18 Aug 2020 10:59:35 +0530
From:   Kanchan Joshi <joshi.k@...sung.com>
To:     kbusch@...nel.org, hch@....de, Damien.LeMoal@....com,
        axboe@...nel.dk, sagi@...mberg.me
Cc:     linux-nvme@...ts.infradead.org, linux-kernel@...r.kernel.org,
        johannes.thumshirn@....com, Kanchan Joshi <joshi.k@...sung.com>
Subject: [PATCH 1/2] nvme: set io-scheduler requirement for ZNS

Set elevator feature ELEVATOR_F_ZBD_SEQ_WRITE required for ZNS.

Signed-off-by: Kanchan Joshi <joshi.k@...sung.com>
---
 drivers/nvme/host/zns.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/nvme/host/zns.c b/drivers/nvme/host/zns.c
index 57cfd78731fb..cabd870fb64e 100644
--- a/drivers/nvme/host/zns.c
+++ b/drivers/nvme/host/zns.c
@@ -96,6 +96,7 @@ int nvme_update_zone_info(struct gendisk *disk, struct nvme_ns *ns,
 
 	q->limits.zoned = BLK_ZONED_HM;
 	blk_queue_flag_set(QUEUE_FLAG_ZONE_RESETALL, q);
+	blk_queue_required_elevator_features(q, ELEVATOR_F_ZBD_SEQ_WRITE);
 	blk_queue_max_open_zones(q, le32_to_cpu(id->mor) + 1);
 	blk_queue_max_active_zones(q, le32_to_cpu(id->mar) + 1);
 free_data:
-- 
2.17.1