From b73cd4d344a028c82d734749b0053974803d00be Mon Sep 17 00:00:00 2001
From: Konstantin Belousov <kib@FreeBSD.org>
Date: Wed, 5 Apr 2017 17:20:31 +0000
Subject: [PATCH] Handle nfs IO_ASYNC write requests asynchronously.

Reviewed by:	markj, rmacklem
Tested by:	pho
Sponsored by:	The FreeBSD Foundation
MFC after:	2 weeks
X-Differential revision:	https://reviews.freebsd.org/D10241
---
 sys/fs/nfsclient/nfs_clbio.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sys/fs/nfsclient/nfs_clbio.c b/sys/fs/nfsclient/nfs_clbio.c
index 9845cca1845..b987698480b 100644
--- a/sys/fs/nfsclient/nfs_clbio.c
+++ b/sys/fs/nfsclient/nfs_clbio.c
@@ -1275,7 +1275,7 @@ again:
 					error = error1;
 				break;
 			}
-		} else if ((n + on) == biosize) {
+		} else if ((n + on) == biosize || (ioflag & IO_ASYNC) != 0) {
 			bp->b_flags |= B_ASYNC;
 			(void) ncl_writebp(bp, 0, NULL);
 		} else {