linux-kernel - [PATCH 3/3] drbd: set QUEUE_FLAG_STABLE

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Message-Id: <20220406190445.1937206-4-christoph.boehmwalder@linbit.com>
Date:   Wed,  6 Apr 2022 21:04:45 +0200
From:   Christoph Böhmwalder 
        <christoph.boehmwalder@...bit.com>
To:     Jens Axboe <axboe@...nel.dk>
Cc:     drbd-dev@...ts.linbit.com, linux-kernel@...r.kernel.org,
        Lars Ellenberg <lars.ellenberg@...bit.com>,
        Philipp Reisner <philipp.reisner@...bit.com>,
        linux-block@...r.kernel.org,
        Christoph Böhmwalder <christoph@...hmwalder.at>,
        Christoph Böhmwalder 
        <christoph.boehmwalder@...bit.com>
Subject: [PATCH 3/3] drbd: set QUEUE_FLAG_STABLE_WRITES

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

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

Signed-off-by: Christoph Böhmwalder <christoph.boehmwalder@...bit.com>
---
 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 d6dfa286ddb3..4b0b25cc916e 100644
--- a/drivers/block/drbd/drbd_main.c
+++ b/drivers/block/drbd/drbd_main.c
@@ -2719,6 +2719,7 @@ 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