4168 ztest assertion failure in dbuf_undirty
4169 verbatim import causes zdb to segfault
4170 zhack leaves pool in ACTIVE state
Reviewed by: Adam Leventhal <ahl@delphix.com>
Reviewed by: Eric Schrock <eric.schrock@delphix.com>
Reviewed by: Matthew Ahrens <mahrens@delphix.com>

@@ -1332,18 +1332,10 @@
         ASSERT(dr->dr_dbuf == db);
 
         DB_DNODE_ENTER(db);
         dn = DB_DNODE(db);
 
-        /*
-         * Note:  This code will probably work even if there are concurrent
-         * holders, but it is untested in that scenerio, as the ZPL and
-         * ztest have additional locking (the range locks) that prevents
-         * that type of concurrent access.
-         */
-        ASSERT3U(refcount_count(&db->db_holds), ==, db->db_dirtycnt);
-
         dprintf_dbuf(db, "size=%llx\n", (u_longlong_t)db->db.db_size);
 
         ASSERT(db->db.db_size != 0);
 
         /*