linux-kernel - [PATCH AUTOSEL 5.15 32/41] drbd: set QUEUE_FLAG_STABLE

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Date:   Mon, 11 Apr 2022 20:46:44 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Christoph Böhmwalder <christoph@...hmwalder.at>,
        Christoph Böhmwalder 
        <christoph.boehmwalder@...bit.com>, Jens Axboe <axboe@...nel.dk>,
        Sasha Levin <sashal@...nel.org>, philipp.reisner@...bit.com,
        lars.ellenberg@...bit.com, drbd-dev@...ts.linbit.com,
        linux-block@...r.kernel.org
Subject: [PATCH AUTOSEL 5.15 32/41] drbd: set QUEUE_FLAG_STABLE_WRITES

From: Christoph Böhmwalder <christoph@...hmwalder.at>

[ Upstream commit 286901941fd18a52b2138fddbbf589ad3639eb00 ]

We want our pages not to change while they are being written.

Signed-off-by: Christoph Böhmwalder <christoph.boehmwalder@...bit.com>
Signed-off-by: Jens Axboe <axboe@...nel.dk>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/block/drbd/drbd_main.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/block/drbd/drbd_main.c b/drivers/block/drbd/drbd_main.c
index 55234a558e98..548e0dd53528 100644
--- a/drivers/block/drbd/drbd_main.c
+++ b/drivers/block/drbd/drbd_main.c
@@ -2737,6 +2737,7 @@ enum drbd_ret_code drbd_create_device(struct drbd_config_context *adm_ctx, unsig
 	sprintf(disk->disk_name, "drbd%d", minor);
 	disk->private_data = device;
 
+	blk_queue_flag_set(QUEUE_FLAG_STABLE_WRITES, disk->queue);
 	blk_queue_write_cache(disk->queue, true, true);
 	/* Setting the max_hw_sectors to an odd value of 8kibyte here
 	   This triggers a max_bio_size message upon first attach or connect */
-- 
2.35.1