Index: head/sys/fs/nfsserver/nfs_nfsdstate.c
===================================================================
--- head/sys/fs/nfsserver/nfs_nfsdstate.c
+++ head/sys/fs/nfsserver/nfs_nfsdstate.c
@@ -70,6 +70,11 @@
     &nfsrv_v4statelimit, 0,
     "High water limit for NFSv4 opens+locks+delegations");
 
+static int	nfsrv_writedelegifpos = 0;
+SYSCTL_INT(_vfs_nfsd, OID_AUTO, writedelegifpos, CTLFLAG_RW,
+    &nfsrv_writedelegifpos, 0,
+    "Issue a write delegation for read opens if possible");
+
 /*
  * Hash lists for nfs V4.
  */
@@ -80,7 +85,6 @@
 
 static u_int32_t nfsrv_openpluslock = 0, nfsrv_delegatecnt = 0;
 static time_t nfsrvboottime;
-static int nfsrv_writedelegifpos = 1;
 static int nfsrv_returnoldstateid = 0, nfsrv_clients = 0;
 static int nfsrv_clienthighwater = NFSRV_CLIENTHIGHWATER;
 static int nfsrv_nogsscallback = 0;