+ if (level > 1) {
+ /* It is writable only in a parent txn */
+ size_t sz = (size_t) psize * ovpages, off;
+ MDB_page *np = mdb_page_malloc(mc, ovpages);
+ MDB_ID2 id2;
+ if (!np)
+ return ENOMEM;
+ id2.mid = pg;
+ id2.mptr = np;
+ mdb_mid2l_insert(mc->mc_txn->mt_u.dirty_list, &id2);
+ if (!(flags & MDB_RESERVE)) {
+ /* Copy end of page, adjusting alignment so
+ * compiler may copy words instead of bytes.
+ */
+ off = (PAGEHDRSZ + data->mv_size) & -sizeof(size_t);
+ memcpy((size_t *)((char *)np + off),
+ (size_t *)((char *)omp + off), sz - off);
+ sz = PAGEHDRSZ;
+ }
+ memcpy(np, omp, sz); /* Copy beginning of page */
+ omp = np;
+ }