From cfe5d18823aaadedf999c4ce2f05335a1d4abefd Mon Sep 17 00:00:00 2001
From: "Simon A. F. Lund" <simon.lund@samsung.com>
Date: Mon, 26 Sep 2022 17:26:45 +0200
Subject: [PATCH] bdev/xnvme: enable polling on io_uring_cmd

Fixes #2708 for io_uring_cmd.

This is a minimal approach to enabling polling for bdev_xnvme. Ideally,
more would be done, however, there are several blockers to remove when
doing so. Thus, this commit only enables polling on
io_mechanism=io_uring_cmd.

Signed-off-by: Simon A. F. Lund <simon.lund@samsung.com>
Change-Id: Ifa604b52bb2b924fab4b559fae06f26a3574db42
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/14679
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Community-CI: Mellanox Build Bot
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
---
 module/bdev/xnvme/bdev_xnvme.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/module/bdev/xnvme/bdev_xnvme.c b/module/bdev/xnvme/bdev_xnvme.c
index f71df0ede..645ff0779 100644
--- a/module/bdev/xnvme/bdev_xnvme.c
+++ b/module/bdev/xnvme/bdev_xnvme.c
@@ -320,6 +320,10 @@ create_xnvme_bdev(const char *name, const char *filename, const char *io_mechani
 		goto error_return;
 	}
 
+	if (!strcmp(xnvme->io_mechanism, "io_uring_cmd")) {
+		opts.poll_sq = 1;
+	}
+
 	xnvme->filename = strdup(filename);
 	if (!xnvme->filename) {
 		goto error_return;