drbd: set QUEUE_FLAG_STABLE_WRITES

[ Upstream commit 286901941fd18a52b2138fddbbf589ad3639eb00 ]

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

Signed-off-by: Christoph Böhmwalder <christoph.boehmwalder@linbit.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/block/drbd/drbd_main.c b/drivers/block/drbd/drbd_main.c
index 55234a5..548e0dd 100644 (file)
--- 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 */