From df14d53dfecddc03240caf3e1fbf131116224ed3 Mon Sep 17 00:00:00 2001
From: Xiaodong Liu <xiaodong.liu@intel.com>
Date: Wed, 22 Nov 2017 22:31:27 -0500
Subject: [PATCH] nbd: add pthread_detach for created thread

Using pthead_detach to let system take back the resources owned
by SPDK created thread for nbd kernel module.

Change-Id: I39f3c0b60ecf57f3227a7b4733a0f144a6e169c5
Signed-off-by: Xiaodong Liu <xiaodong.liu@intel.com>
Reviewed-on: https://review.gerrithub.io/388722
Tested-by: SPDK Automated Test System <sys_sgsw@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Daniel Verkamp <daniel.verkamp@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
Reviewed-by: <shuhei.matsumoto.xt@hitachi.com>
---
 lib/nbd/nbd.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/lib/nbd/nbd.c b/lib/nbd/nbd.c
index cc96b4b08..a68725daa 100644
--- a/lib/nbd/nbd.c
+++ b/lib/nbd/nbd.c
@@ -455,6 +455,13 @@ spdk_nbd_start(struct spdk_bdev *bdev, const char *nbd_path)
 		goto err;
 	}
 
+	rc = pthread_detach(tid);
+	if (rc != 0) {
+		spdk_strerror_r(rc, buf, sizeof(buf));
+		SPDK_ERRLOG("could not detach thread for nbd kernel: %s\n", buf);
+		goto err;
+	}
+
 	fcntl(nbd->spdk_sp_fd, F_SETFL, O_NONBLOCK);
 
 	to_be32(&nbd->io.resp.magic, NBD_REPLY_MAGIC);