hashmap: add API to disable item counting when threaded
[git/git.git] / name-hash.c
index bd8dc7a..45c98db 100644 (file)
@@ -584,9 +584,15 @@ static void lazy_init_name_hash(struct index_state *istate)
        hashmap_init(&istate->dir_hash, dir_entry_cmp, NULL, istate->cache_nr);
 
        if (lookup_lazy_params(istate)) {
-               hashmap_disallow_rehash(&istate->dir_hash, 1);
+               /*
+                * Disable item counting and automatic rehashing because
+                * we do per-chain (mod n) locking rather than whole hashmap
+                * locking and we need to prevent the table-size from changing
+                * and bucket items from being redistributed.
+                */
+               hashmap_disable_item_counting(&istate->dir_hash);
                threaded_lazy_init_name_hash(istate);
-               hashmap_disallow_rehash(&istate->dir_hash, 0);
+               hashmap_enable_item_counting(&istate->dir_hash);
        } else {
                int nr;
                for (nr = 0; nr < istate->cache_nr; nr++)