zpool import speedup

@@ -631,11 +631,11 @@
         zilog_t *zilog;
         zil_header_t *zh;
         objset_t *os;
         int error;
 
-        error = dmu_objset_own(osname, DMU_OST_ANY, B_FALSE, FTAG, &os);
+        error = dmu_objset_own_nolock(osname, DMU_OST_ANY, B_FALSE, FTAG, &os);
         if (error != 0) {
                 cmn_err(CE_WARN, "can't open objset for %s", osname);
                 return (0);
         }
 

@@ -689,11 +689,11 @@
         blkptr_t *bp;
         int error;
 
         ASSERT(tx == NULL);
 
-        error = dmu_objset_hold(osname, FTAG, &os);
+        error = dmu_objset_hold_nolock(osname, FTAG, &os);
         if (error != 0) {
                 cmn_err(CE_WARN, "can't open objset for %s", osname);
                 return (0);
         }