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[SRU,Xenial,1/1] NVMe: Allow request merges

Message ID 20190619043402.6221-2-matthew.ruffell@canonical.com
State New
Headers show
Series Performance degradation when copying from LVM snapshot backed by NVMe disk | expand

Commit Message

Matthew Ruffell June 19, 2019, 4:34 a.m. UTC 
From: Keith Busch <keith.busch@intel.com>

BugLink: https://bugs.launchpad.net/bugs/1833319

It is generally more efficient to submit larger IO.

Signed-off-by: Keith Busch <keith.busch@intel.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Reviewed-by: Sagi Grimberg <sagig@mellanox.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
(cherry picked from commit ef2d4615c59efb312e531a5e949970f37ca1c841)
Signed-off-by: Matthew Ruffell <matthew.ruffell@canonical.com>
---
 drivers/nvme/host/core.c | 1 -
 1 file changed, 1 deletion(-)
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Patch

diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c
index 680f57ada425..654136416d16 100644
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -1391,7 +1391,6 @@  static void nvme_alloc_ns(struct nvme_ctrl *ctrl, unsigned nsid)
 	ns->queue = blk_mq_init_queue(ctrl->tagset);
 	if (IS_ERR(ns->queue))
 		goto out_free_ns;
-	queue_flag_set_unlocked(QUEUE_FLAG_NOMERGES, ns->queue);
 	queue_flag_set_unlocked(QUEUE_FLAG_NONROT, ns->queue);
 	ns->queue->queuedata = ns;
 	ns->ctrl = ctrl;