Merge branch 'kn/the-repository' into kn/midx-wo-the-repository

* kn/the-repository:
  packfile.c: remove unnecessary prepare_packed_git() call
  midx: add repository to `multi_pack_index` struct
  config: make `packed_git_(limit|window_size)` non-global variables
  config: make `delta_base_cache_limit` a non-global variable
  packfile: pass down repository to `for_each_packed_object`
  packfile: pass down repository to `has_object[_kept]_pack`
  packfile: pass down repository to `odb_pack_name`
  packfile: pass `repository` to static function in the file
  packfile: use `repository` from `packed_git` directly
  packfile: add repository to struct `packed_git`

builtin/cat-file.c

@@ -827,15 +827,16 @@ static int batch_objects(struct batch_options *opt)
 			cb.seen = &seen;
 
 			for_each_loose_object(batch_unordered_loose, &cb, 0);
-			for_each_packed_object(batch_unordered_packed, &cb,
+			for_each_packed_object(the_repository, batch_unordered_packed,
-					       FOR_EACH_OBJECT_PACK_ORDER);
+					       &cb, FOR_EACH_OBJECT_PACK_ORDER);
 
 			oidset_clear(&seen);
 		} else {
 			struct oid_array sa = OID_ARRAY_INIT;
 
 			for_each_loose_object(collect_loose_object, &sa, 0);
-			for_each_packed_object(collect_packed_object, &sa, 0);
+			for_each_packed_object(the_repository, collect_packed_object,
+					       &sa, 0);
 
 			oid_array_for_each_unique(&sa, batch_object_cb, &cb);
 

builtin/count-objects.c

@@ -67,7 +67,7 @@ static int count_loose(const struct object_id *oid, const char *path,
 	else {
 		loose_size += on_disk_bytes(st);
 		loose++;
-		if (verbose && has_object_pack(oid))
+		if (verbose && has_object_pack(the_repository, oid))
 			packed_loose++;
 	}
 	return 0;

builtin/fast-import.c

@@ -765,6 +765,7 @@ static void start_packfile(void)
 
 	p->pack_fd = pack_fd;
 	p->do_not_close = 1;
+	p->repo = the_repository;
 	pack_file = hashfd(pack_fd, p->pack_name);
 
 	pack_data = p;
@@ -805,7 +806,7 @@ static char *keep_pack(const char *curr_index_name)
 	struct strbuf name = STRBUF_INIT;
 	int keep_fd;
 
-	odb_pack_name(&name, pack_data->hash, "keep");
+	odb_pack_name(pack_data->repo, &name, pack_data->hash, "keep");
 	keep_fd = odb_pack_keep(name.buf);
 	if (keep_fd < 0)
 		die_errno("cannot create keep file");
@@ -813,11 +814,11 @@ static char *keep_pack(const char *curr_index_name)
 	if (close(keep_fd))
 		die_errno("failed to write keep file");
 
-	odb_pack_name(&name, pack_data->hash, "pack");
+	odb_pack_name(pack_data->repo, &name, pack_data->hash, "pack");
 	if (finalize_object_file(pack_data->pack_name, name.buf))
 		die("cannot store pack file");
 
-	odb_pack_name(&name, pack_data->hash, "idx");
+	odb_pack_name(pack_data->repo, &name, pack_data->hash, "idx");
 	if (finalize_object_file(curr_index_name, name.buf))
 		die("cannot store index file");
 	free((void *)curr_index_name);
@@ -831,7 +832,7 @@ static void unkeep_all_packs(void)
 
 	for (k = 0; k < pack_id; k++) {
 		struct packed_git *p = all_packs[k];
-		odb_pack_name(&name, p->hash, "keep");
+		odb_pack_name(p->repo, &name, p->hash, "keep");
 		unlink_or_warn(name.buf);
 	}
 	strbuf_release(&name);
@@ -888,7 +889,7 @@ static void end_packfile(void)
 		idx_name = keep_pack(create_index());
 
 		/* Register the packfile with core git's machinery. */
-		new_p = add_packed_git(idx_name, strlen(idx_name), 1);
+		new_p = add_packed_git(pack_data->repo, idx_name, strlen(idx_name), 1);
 		if (!new_p)
 			die("core git rejected index %s", idx_name);
 		all_packs[pack_id] = new_p;
@@ -3538,7 +3539,7 @@ static void parse_argv(void)
 int cmd_fast_import(int argc,
 		    const char **argv,
 		    const char *prefix,
-		    struct repository *repo UNUSED)
+		    struct repository *repo)
 {
 	unsigned int i;
 
@@ -3659,7 +3660,7 @@ int cmd_fast_import(int argc,
 		fprintf(stderr, "       pools:    %10lu KiB\n", (unsigned long)((tree_entry_allocd + fi_mem_pool.pool_alloc) /1024));
 		fprintf(stderr, "     objects:    %10" PRIuMAX " KiB\n", (alloc_count*sizeof(struct object_entry))/1024);
 		fprintf(stderr, "---------------------------------------------------------------------\n");
-		pack_report();
+		pack_report(repo);
 		fprintf(stderr, "---------------------------------------------------------------------\n");
 		fprintf(stderr, "\n");
 	}

builtin/fsck.c

@@ -150,7 +150,7 @@ static int mark_object(struct object *obj, enum object_type type,
 		return 0;
 	obj->flags |= REACHABLE;
 
-	if (is_promisor_object(&obj->oid))
+	if (is_promisor_object(the_repository, &obj->oid))
 		/*
 		 * Further recursion does not need to be performed on this
 		 * object since it is a promisor object (so it does not need to
@@ -270,9 +270,9 @@ static void check_reachable_object(struct object *obj)
 	 * do a full fsck
 	 */
 	if (!(obj->flags & HAS_OBJ)) {
-		if (is_promisor_object(&obj->oid))
+		if (is_promisor_object(the_repository, &obj->oid))
 			return;
-		if (has_object_pack(&obj->oid))
+		if (has_object_pack(the_repository, &obj->oid))
 			return; /* it is in pack - forget about it */
 		printf_ln(_("missing %s %s"),
 			  printable_type(&obj->oid, obj->type),
@@ -391,7 +391,10 @@ static void check_connectivity(void)
 		 * traversal.
 		 */
 		for_each_loose_object(mark_loose_unreachable_referents, NULL, 0);
-		for_each_packed_object(mark_packed_unreachable_referents, NULL, 0);
+		for_each_packed_object(the_repository,
+				       mark_packed_unreachable_referents,
+				       NULL,
+				       0);
 	}
 
 	/* Look up all the requirements, warn about missing objects.. */
@@ -488,7 +491,7 @@ static void fsck_handle_reflog_oid(const char *refname, struct object_id *oid,
 						     refname, timestamp);
 			obj->flags |= USED;
 			mark_object_reachable(obj);
-		} else if (!is_promisor_object(oid)) {
+		} else if (!is_promisor_object(the_repository, oid)) {
 			error(_("%s: invalid reflog entry %s"),
 			      refname, oid_to_hex(oid));
 			errors_found |= ERROR_REACHABLE;
@@ -531,7 +534,7 @@ static int fsck_handle_ref(const char *refname, const char *referent UNUSED, con
 
 	obj = parse_object(the_repository, oid);
 	if (!obj) {
-		if (is_promisor_object(oid)) {
+		if (is_promisor_object(the_repository, oid)) {
 			/*
 			 * Increment default_refs anyway, because this is a
 			 * valid ref.
@@ -966,7 +969,8 @@ int cmd_fsck(int argc,
 
 	if (connectivity_only) {
 		for_each_loose_object(mark_loose_for_connectivity, NULL, 0);
-		for_each_packed_object(mark_packed_for_connectivity, NULL, 0);
+		for_each_packed_object(the_repository,
+				       mark_packed_for_connectivity, NULL, 0);
 	} else {
 		prepare_alt_odb(the_repository);
 		for (odb = the_repository->objects->odb; odb; odb = odb->next)
@@ -1011,7 +1015,7 @@ int cmd_fsck(int argc,
 							   &oid);
 
 			if (!obj || !(obj->flags & HAS_OBJ)) {
-				if (is_promisor_object(&oid))
+				if (is_promisor_object(the_repository, &oid))
 					continue;
 				error(_("%s: object missing"), oid_to_hex(&oid));
 				errors_found |= ERROR_OBJECT;

builtin/gc.c

@@ -138,6 +138,11 @@ struct gc_config {
 	char *repack_filter_to;
 	unsigned long big_pack_threshold;
 	unsigned long max_delta_cache_size;
+	/*
+	 * Remove this member from gc_config once repo_settings is passed
+	 * through the callchain.
+	 */
+	size_t delta_base_cache_limit;
 };
 
 #define GC_CONFIG_INIT { \
@@ -153,6 +158,7 @@ struct gc_config {
 	.prune_expire = xstrdup("2.weeks.ago"), \
 	.prune_worktrees_expire = xstrdup("3.months.ago"), \
 	.max_delta_cache_size = DEFAULT_DELTA_CACHE_SIZE, \
+	.delta_base_cache_limit = DEFAULT_DELTA_BASE_CACHE_LIMIT, \
 }
 
 static void gc_config_release(struct gc_config *cfg)
@@ -168,6 +174,7 @@ static void gc_config(struct gc_config *cfg)
 {
 	const char *value;
 	char *owned = NULL;
+	unsigned long ulongval;
 
 	if (!git_config_get_value("gc.packrefs", &value)) {
 		if (value && !strcmp(value, "notbare"))
@@ -206,6 +213,9 @@ static void gc_config(struct gc_config *cfg)
 	git_config_get_ulong("gc.bigpackthreshold", &cfg->big_pack_threshold);
 	git_config_get_ulong("pack.deltacachesize", &cfg->max_delta_cache_size);
 
+	if (!git_config_get_ulong("core.deltabasecachelimit", &ulongval))
+		cfg->delta_base_cache_limit = ulongval;
+
 	if (!git_config_get_string("gc.repackfilter", &owned)) {
 		free(cfg->repack_filter);
 		cfg->repack_filter = owned;
@@ -416,7 +426,7 @@ static uint64_t estimate_repack_memory(struct gc_config *cfg,
 	 * read_sha1_file() (either at delta calculation phase, or
 	 * writing phase) also fills up the delta base cache
 	 */
-	heap += delta_base_cache_limit;
+	heap += cfg->delta_base_cache_limit;
 	/* and of course pack-objects has its own delta cache */
 	heap += cfg->max_delta_cache_size;
 

builtin/index-pack.c

@@ -1291,7 +1291,7 @@ static void parse_pack_objects(unsigned char *hash)
  *   recursively checking if the resulting object is used as a base
  *   for some more deltas.
  */
-static void resolve_deltas(void)
+static void resolve_deltas(struct pack_idx_option *opts)
 {
 	int i;
 
@@ -1307,7 +1307,7 @@ static void resolve_deltas(void)
 					  nr_ref_deltas + nr_ofs_deltas);
 
 	nr_dispatched = 0;
-	base_cache_limit = delta_base_cache_limit * nr_threads;
+	base_cache_limit = opts->delta_base_cache_limit * nr_threads;
 	if (nr_threads > 1 || getenv("GIT_FORCE_THREADS")) {
 		init_thread();
 		work_lock();
@@ -1532,7 +1532,7 @@ static void write_special_file(const char *suffix, const char *msg,
 	if (pack_name)
 		filename = derive_filename(pack_name, "pack", suffix, &name_buf);
 	else
-		filename = odb_pack_name(&name_buf, hash, suffix);
+		filename = odb_pack_name(the_repository, &name_buf, hash, suffix);
 
 	fd = odb_pack_keep(filename);
 	if (fd < 0) {
@@ -1560,7 +1560,7 @@ static void rename_tmp_packfile(const char **final_name,
 {
 	if (!*final_name || strcmp(*final_name, curr_name)) {
 		if (!*final_name)
-			*final_name = odb_pack_name(name, hash, ext);
+			*final_name = odb_pack_name(the_repository, name, hash, ext);
 		if (finalize_object_file(curr_name, *final_name))
 			die(_("unable to rename temporary '*.%s' file to '%s'"),
 			    ext, *final_name);
@@ -1605,7 +1605,8 @@ static void final(const char *final_pack_name, const char *curr_pack_name,
 
 	if (do_fsck_object) {
 		struct packed_git *p;
-		p = add_packed_git(final_index_name, strlen(final_index_name), 0);
+		p = add_packed_git(the_repository, final_index_name,
+				   strlen(final_index_name), 0);
 		if (p)
 			install_packed_git(the_repository, p);
 	}
@@ -1656,6 +1657,10 @@ static int git_index_pack_config(const char *k, const char *v,
 		else
 			opts->flags &= ~WRITE_REV;
 	}
+	if (!strcmp(k, "core.deltabasecachelimit")) {
+		opts->delta_base_cache_limit = git_config_ulong(k, v, ctx->kvi);
+		return 0;
+	}
 	return git_default_config(k, v, ctx, cb);
 }
 
@@ -1703,7 +1708,8 @@ static void read_v2_anomalous_offsets(struct packed_git *p,
 
 static void read_idx_option(struct pack_idx_option *opts, const char *pack_name)
 {
-	struct packed_git *p = add_packed_git(pack_name, strlen(pack_name), 1);
+	struct packed_git *p = add_packed_git(the_repository, pack_name,
+					      strlen(pack_name), 1);
 
 	if (!p)
 		die(_("Cannot open existing pack file '%s'"), pack_name);
@@ -2033,7 +2039,7 @@ int cmd_index_pack(int argc,
 	parse_pack_objects(pack_hash);
 	if (report_end_of_input)
 		write_in_full(2, "\0", 1);
-	resolve_deltas();
+	resolve_deltas(&opts);
 	conclude_pack(fix_thin_pack, curr_pack, pack_hash);
 	free(ofs_deltas);
 	free(ref_deltas);

builtin/pack-objects.c

@@ -1530,7 +1530,7 @@ static int want_found_object(const struct object_id *oid, int exclude,
 			return 0;
 		if (ignore_packed_keep_in_core && p->pack_keep_in_core)
 			return 0;
-		if (has_object_kept_pack(oid, flags))
+		if (has_object_kept_pack(p->repo, oid, flags))
 			return 0;
 	}
 
@@ -3628,7 +3628,7 @@ static void show_cruft_commit(struct commit *commit, void *data)
 
 static int cruft_include_check_obj(struct object *obj, void *data UNUSED)
 {
-	return !has_object_kept_pack(&obj->oid, IN_CORE_KEEP_PACKS);
+	return !has_object_kept_pack(to_pack.repo, &obj->oid, IN_CORE_KEEP_PACKS);
 }
 
 static int cruft_include_check(struct commit *commit, void *data)
@@ -3859,7 +3859,8 @@ static void show_object__ma_allow_promisor(struct object *obj, const char *name,
 	 * Quietly ignore EXPECTED missing objects.  This avoids problems with
 	 * staging them now and getting an odd error later.
 	 */
-	if (!has_object(the_repository, &obj->oid, 0) && is_promisor_object(&obj->oid))
+	if (!has_object(the_repository, &obj->oid, 0) &&
+	    is_promisor_object(to_pack.repo, &obj->oid))
 		return;
 
 	show_object(obj, name, data);
@@ -3928,7 +3929,9 @@ static int add_object_in_unpacked_pack(const struct object_id *oid,
 
 static void add_objects_in_unpacked_packs(void)
 {
-	if (for_each_packed_object(add_object_in_unpacked_pack, NULL,
+	if (for_each_packed_object(to_pack.repo,
+				   add_object_in_unpacked_pack,
+				   NULL,
 				   FOR_EACH_OBJECT_PACK_ORDER |
 				   FOR_EACH_OBJECT_LOCAL_ONLY |
 				   FOR_EACH_OBJECT_SKIP_IN_CORE_KEPT_PACKS |

builtin/pack-redundant.c

@@ -690,7 +690,7 @@ int cmd_pack_redundant(int argc, const char **argv, const char *prefix UNUSED, s
 	pl = red = pack_list_difference(local_packs, min);
 	while (pl) {
 		printf("%s\n%s\n",
-		       odb_pack_name(&idx_name, pl->pack->hash, "idx"),
+		       odb_pack_name(pl->pack->repo, &idx_name, pl->pack->hash, "idx"),
 		       pl->pack->pack_name);
 		pl = pl->next;
 	}

builtin/repack.c

@@ -404,7 +404,7 @@ static void repack_promisor_objects(const struct pack_objects_args *args,
 	 * {type -> existing pack order} ordering when computing deltas instead
 	 * of a {type -> size} ordering, which may produce better deltas.
 	 */
-	for_each_packed_object(write_oid, &cmd,
+	for_each_packed_object(the_repository, write_oid, &cmd,
 			       FOR_EACH_OBJECT_PROMISOR_ONLY);
 
 	if (cmd.in == -1) {

builtin/rev-list.c

@@ -121,7 +121,7 @@ static inline void finish_object__ma(struct object *obj)
 		return;
 
 	case MA_ALLOW_PROMISOR:
-		if (is_promisor_object(&obj->oid))
+		if (is_promisor_object(the_repository, &obj->oid))
 			return;
 		die("unexpected missing %s object '%s'",
 		    type_name(obj->type), oid_to_hex(&obj->oid));

commit-graph.c

@@ -1914,7 +1914,7 @@ static int fill_oids_from_packs(struct write_commit_graph_context *ctx,
 		struct packed_git *p;
 		strbuf_setlen(&packname, dirlen);
 		strbuf_addstr(&packname, pack_indexes->items[i].string);
-		p = add_packed_git(packname.buf, packname.len, 1);
+		p = add_packed_git(ctx->r, packname.buf, packname.len, 1);
 		if (!p) {
 			ret = error(_("error adding pack %s"), packname.buf);
 			goto cleanup;
@@ -1960,7 +1960,7 @@ static void fill_oids_from_all_packs(struct write_commit_graph_context *ctx)
 		ctx->progress = start_delayed_progress(
 			_("Finding commits for commit graph among packed objects"),
 			ctx->approx_nr_objects);
-	for_each_packed_object(add_packed_commits, ctx,
+	for_each_packed_object(ctx->r, add_packed_commits, ctx,
 			       FOR_EACH_OBJECT_PACK_ORDER);
 	if (ctx->progress_done < ctx->approx_nr_objects)
 		display_progress(ctx->progress, ctx->approx_nr_objects);

config.c

@@ -1493,33 +1493,11 @@ static int git_default_core_config(const char *var, const char *value,
 		return 0;
 	}
 
-	if (!strcmp(var, "core.packedgitwindowsize")) {
-		int pgsz_x2 = getpagesize() * 2;
-		packed_git_window_size = git_config_ulong(var, value, ctx->kvi);
-
-		/* This value must be multiple of (pagesize * 2) */
-		packed_git_window_size /= pgsz_x2;
-		if (packed_git_window_size < 1)
-			packed_git_window_size = 1;
-		packed_git_window_size *= pgsz_x2;
-		return 0;
-	}
-
 	if (!strcmp(var, "core.bigfilethreshold")) {
 		big_file_threshold = git_config_ulong(var, value, ctx->kvi);
 		return 0;
 	}
 
-	if (!strcmp(var, "core.packedgitlimit")) {
-		packed_git_limit = git_config_ulong(var, value, ctx->kvi);
-		return 0;
-	}
-
-	if (!strcmp(var, "core.deltabasecachelimit")) {
-		delta_base_cache_limit = git_config_ulong(var, value, ctx->kvi);
-		return 0;
-	}
-
 	if (!strcmp(var, "core.autocrlf")) {
 		if (value && !strcasecmp(value, "input")) {
 			auto_crlf = AUTO_CRLF_INPUT;

connected.c

@@ -54,7 +54,8 @@ int check_connected(oid_iterate_fn fn, void *cb_data,
 		strbuf_add(&idx_file, transport->pack_lockfiles.items[0].string,
 			   base_len);
 		strbuf_addstr(&idx_file, ".idx");
-		new_pack = add_packed_git(idx_file.buf, idx_file.len, 1);
+		new_pack = add_packed_git(the_repository, idx_file.buf,
+					  idx_file.len, 1);
 		strbuf_release(&idx_file);
 	}
 

diff.c

@@ -4041,7 +4041,8 @@ static int reuse_worktree_file(struct index_state *istate,
 	 * objects however would tend to be slower as they need
 	 * to be individually opened and inflated.
 	 */
-	if (!FAST_WORKING_DIRECTORY && !want_file && has_object_pack(oid))
+	if (!FAST_WORKING_DIRECTORY && !want_file &&
+	    has_object_pack(istate->repo, oid))
 		return 0;
 
 	/*

environment.c

@@ -49,9 +49,6 @@ int fsync_object_files = -1;
 int use_fsync = -1;
 enum fsync_method fsync_method = FSYNC_METHOD_DEFAULT;
 enum fsync_component fsync_components = FSYNC_COMPONENTS_DEFAULT;
-size_t packed_git_window_size = DEFAULT_PACKED_GIT_WINDOW_SIZE;
-size_t packed_git_limit = DEFAULT_PACKED_GIT_LIMIT;
-size_t delta_base_cache_limit = 96 * 1024 * 1024;
 unsigned long big_file_threshold = 512 * 1024 * 1024;
 char *editor_program;
 char *askpass_program;

environment.h

@@ -165,7 +165,6 @@ extern int zlib_compression_level;
 extern int pack_compression_level;
 extern size_t packed_git_window_size;
 extern size_t packed_git_limit;
-extern size_t delta_base_cache_limit;
 extern unsigned long big_file_threshold;
 extern unsigned long pack_size_limit_cfg;
 extern int max_allowed_tree_depth;

fsck.c

@@ -1295,7 +1295,7 @@ static int fsck_blobs(struct oidset *blobs_found, struct oidset *blobs_done,
 
 		buf = repo_read_object_file(the_repository, oid, &type, &size);
 		if (!buf) {
-			if (is_promisor_object(oid))
+			if (is_promisor_object(the_repository, oid))
 				continue;
 			ret |= report(options,
 				      oid, OBJ_BLOB, msg_missing,

http.c

@@ -2439,7 +2439,7 @@ static int fetch_and_setup_pack_index(struct packed_git **packs_head,
 	if (!tmp_idx)
 		return -1;
 
-	new_pack = parse_pack_index(sha1, tmp_idx);
+	new_pack = parse_pack_index(the_repository, sha1, tmp_idx);
 	if (!new_pack) {
 		unlink(tmp_idx);
 		free(tmp_idx);
@@ -2581,7 +2581,7 @@ struct http_pack_request *new_direct_http_pack_request(
 
 	preq->url = url;
 
-	odb_pack_name(&preq->tmpfile, packed_git_hash, "pack");
+	odb_pack_name(the_repository, &preq->tmpfile, packed_git_hash, "pack");
 	strbuf_addstr(&preq->tmpfile, ".temp");
 	preq->packfile = fopen(preq->tmpfile.buf, "a");
 	if (!preq->packfile) {

list-objects.c

@@ -41,7 +41,8 @@ static void show_object(struct traversal_context *ctx,
 {
 	if (!ctx->show_object)
 		return;
-	if (ctx->revs->unpacked && has_object_pack(&object->oid))
+	if (ctx->revs->unpacked && has_object_pack(ctx->revs->repo,
+						   &object->oid))
 		return;
 
 	ctx->show_object(object, name, ctx->show_data);
@@ -74,7 +75,7 @@ static void process_blob(struct traversal_context *ctx,
 	 */
 	if (ctx->revs->exclude_promisor_objects &&
 	    !repo_has_object_file(the_repository, &obj->oid) &&
-	    is_promisor_object(&obj->oid))
+	    is_promisor_object(ctx->revs->repo, &obj->oid))
 		return;
 
 	pathlen = path->len;
@@ -179,7 +180,7 @@ static void process_tree(struct traversal_context *ctx,
 		 * an incomplete list of missing objects.
 		 */
 		if (revs->exclude_promisor_objects &&
-		    is_promisor_object(&obj->oid))
+		    is_promisor_object(revs->repo, &obj->oid))
 			return;
 
 		if (!revs->do_not_die_on_missing_objects)

midx-write.c

@@ -154,7 +154,7 @@ static void add_pack_to_midx(const char *full_path, size_t full_path_len,
 			return;
 
 		ALLOC_GROW(ctx->info, ctx->nr + 1, ctx->alloc);
-		p = add_packed_git(full_path, full_path_len, 0);
+		p = add_packed_git(the_repository, full_path, full_path_len, 0);
 		if (!p) {
 			warning(_("failed to add packfile '%s'"),
 				full_path);

midx.c

@@ -131,6 +131,7 @@ static struct multi_pack_index *load_multi_pack_index_one(const char *object_dir
 	m->data = midx_map;
 	m->data_len = midx_size;
 	m->local = local;
+	m->repo = the_repository;
 
 	m->signature = get_be32(m->data);
 	if (m->signature != MIDX_SIGNATURE)
@@ -464,7 +465,7 @@ int prepare_midx_pack(struct repository *r, struct multi_pack_index *m,
 					strhash(key.buf), key.buf,
 					struct packed_git, packmap_ent);
 	if (!p) {
-		p = add_packed_git(pack_name.buf, pack_name.len, m->local);
+		p = add_packed_git(r, pack_name.buf, pack_name.len, m->local);
 		if (p) {
 			install_packed_git(r, p);
 			list_add_tail(&p->mru, &r->objects->packed_git_mru);

midx.h

@@ -71,6 +71,9 @@ struct multi_pack_index {
 
 	const char **pack_names;
 	struct packed_git **packs;
+
+	struct repository *repo;
+
 	char object_dir[FLEX_ARRAY];
 };
 

object-store-ll.h

@@ -10,6 +10,7 @@
 struct oidmap;
 struct oidtree;
 struct strbuf;
+struct repository;
 
 struct object_directory {
 	struct object_directory *next;
@@ -135,6 +136,10 @@ struct packed_git {
 	 */
 	const uint32_t *mtimes_map;
 	size_t mtimes_size;
+
+	/* repo denotes the repository this packfile belongs to */
+	struct repository *repo;
+
 	/* something like ".git/objects/pack/xxxxx.pack" */
 	char pack_name[FLEX_ARRAY]; /* more */
 };
@@ -545,7 +550,7 @@ typedef int each_packed_object_fn(const struct object_id *oid,
 int for_each_object_in_pack(struct packed_git *p,
 			    each_packed_object_fn, void *data,
 			    enum for_each_object_flags flags);
-int for_each_packed_object(each_packed_object_fn, void *,
+int for_each_packed_object(struct repository *repo, each_packed_object_fn cb,
-			   enum for_each_object_flags flags);
+			   void *data, enum for_each_object_flags flags);
 
 #endif /* OBJECT_STORE_LL_H */

pack-bitmap.c

@@ -1,5 +1,3 @@
-#define USE_THE_REPOSITORY_VARIABLE
-
 #include "git-compat-util.h"
 #include "commit.h"
 #include "gettext.h"
@@ -177,12 +175,21 @@ static uint32_t bitmap_num_objects(struct bitmap_index *index)
 	return index->pack->num_objects;
 }
 
+static struct repository *bitmap_repo(struct bitmap_index *bitmap_git)
+{
+	if (bitmap_is_midx(bitmap_git))
+		return bitmap_git->midx->repo;
+	return bitmap_git->pack->repo;
+}
+
 static int load_bitmap_header(struct bitmap_index *index)
 {
 	struct bitmap_disk_header *header = (void *)index->map;
-	size_t header_size = sizeof(*header) - GIT_MAX_RAWSZ + the_hash_algo->rawsz;
+	const struct git_hash_algo *hash_algo = bitmap_repo(index)->hash_algo;
 
-	if (index->map_size < header_size + the_hash_algo->rawsz)
+	size_t header_size = sizeof(*header) - GIT_MAX_RAWSZ + hash_algo->rawsz;
+
+	if (index->map_size < header_size + hash_algo->rawsz)
 		return error(_("corrupted bitmap index (too small)"));
 
 	if (memcmp(header->magic, BITMAP_IDX_SIGNATURE, sizeof(BITMAP_IDX_SIGNATURE)) != 0)
@@ -196,7 +203,7 @@ static int load_bitmap_header(struct bitmap_index *index)
 	{
 		uint32_t flags = ntohs(header->options);
 		size_t cache_size = st_mult(bitmap_num_objects(index), sizeof(uint32_t));
-		unsigned char *index_end = index->map + index->map_size - the_hash_algo->rawsz;
+		unsigned char *index_end = index->map + index->map_size - hash_algo->rawsz;
 
 		if ((flags & BITMAP_OPT_FULL_DAG) == 0)
 			BUG("unsupported options for bitmap index file "
@@ -409,7 +416,7 @@ static int open_midx_bitmap_1(struct bitmap_index *bitmap_git,
 	if (bitmap_git->pack || bitmap_git->midx) {
 		struct strbuf buf = STRBUF_INIT;
 		get_midx_filename(&buf, midx->object_dir);
-		trace2_data_string("bitmap", the_repository,
+		trace2_data_string("bitmap", bitmap_repo(bitmap_git),
 				   "ignoring extra midx bitmap file", buf.buf);
 		close(fd);
 		strbuf_release(&buf);
@@ -427,7 +434,7 @@ static int open_midx_bitmap_1(struct bitmap_index *bitmap_git,
 		goto cleanup;
 
 	if (!hasheq(get_midx_checksum(bitmap_git->midx), bitmap_git->checksum,
-		    the_repository->hash_algo)) {
+		    bitmap_repo(bitmap_git)->hash_algo)) {
 		error(_("checksum doesn't match in MIDX and bitmap"));
 		goto cleanup;
 	}
@@ -438,7 +445,9 @@ static int open_midx_bitmap_1(struct bitmap_index *bitmap_git,
 	}
 
 	for (i = 0; i < bitmap_git->midx->num_packs; i++) {
-		if (prepare_midx_pack(the_repository, bitmap_git->midx, i)) {
+		if (prepare_midx_pack(bitmap_repo(bitmap_git),
+				      bitmap_git->midx,
+				      i)) {
 			warning(_("could not open pack %s"),
 				bitmap_git->midx->pack_names[i]);
 			goto cleanup;
@@ -492,8 +501,9 @@ static int open_pack_bitmap_1(struct bitmap_index *bitmap_git, struct packed_git
 	}
 
 	if (bitmap_git->pack || bitmap_git->midx) {
-		trace2_data_string("bitmap", the_repository,
+		trace2_data_string("bitmap", bitmap_repo(bitmap_git),
-				   "ignoring extra bitmap file", packfile->pack_name);
+				   "ignoring extra bitmap file",
+				   packfile->pack_name);
 		close(fd);
 		return -1;
 	}
@@ -518,8 +528,8 @@ static int open_pack_bitmap_1(struct bitmap_index *bitmap_git, struct packed_git
 		return -1;
 	}
 
-	trace2_data_string("bitmap", the_repository, "opened bitmap file",
+	trace2_data_string("bitmap", bitmap_repo(bitmap_git),
-			   packfile->pack_name);
+			   "opened bitmap file", packfile->pack_name);
 	return 0;
 }
 
@@ -649,7 +659,7 @@ struct bitmap_index *prepare_bitmap_git(struct repository *r)
 
 struct bitmap_index *prepare_midx_bitmap_git(struct multi_pack_index *midx)
 {
-	struct repository *r = the_repository;
+	struct repository *r = midx->repo;
 	struct bitmap_index *bitmap_git = xcalloc(1, sizeof(*bitmap_git));
 
 	if (!open_midx_bitmap_1(bitmap_git, midx) && !load_bitmap(r, bitmap_git))
@@ -1213,6 +1223,7 @@ static struct bitmap *find_boundary_objects(struct bitmap_index *bitmap_git,
 {
 	struct bitmap_boundary_cb cb;
 	struct object_list *root;
+	struct repository *repo;
 	unsigned int i;
 	unsigned int tmp_blobs, tmp_trees, tmp_tags;
 	int any_missing = 0;
@@ -1222,6 +1233,8 @@ static struct bitmap *find_boundary_objects(struct bitmap_index *bitmap_git,
 	cb.base = bitmap_new();
 	object_array_init(&cb.boundary);
 
+	repo = bitmap_repo(bitmap_git);
+
 	revs->ignore_missing_links = 1;
 
 	if (bitmap_git->pseudo_merges.nr) {
@@ -1280,19 +1293,19 @@ static struct bitmap *find_boundary_objects(struct bitmap_index *bitmap_git,
 	 * revision walk to (a) OR in any bitmaps that are UNINTERESTING
 	 * between the tips and boundary, and (b) record the boundary.
 	 */
-	trace2_region_enter("pack-bitmap", "boundary-prepare", the_repository);
+	trace2_region_enter("pack-bitmap", "boundary-prepare", repo);
 	if (prepare_revision_walk(revs))
 		die("revision walk setup failed");
-	trace2_region_leave("pack-bitmap", "boundary-prepare", the_repository);
+	trace2_region_leave("pack-bitmap", "boundary-prepare", repo);
 
-	trace2_region_enter("pack-bitmap", "boundary-traverse", the_repository);
+	trace2_region_enter("pack-bitmap", "boundary-traverse", repo);
 	revs->boundary = 1;
 	traverse_commit_list_filtered(revs,
 				      show_boundary_commit,
 				      show_boundary_object,
 				      &cb, NULL);
 	revs->boundary = 0;
-	trace2_region_leave("pack-bitmap", "boundary-traverse", the_repository);
+	trace2_region_leave("pack-bitmap", "boundary-traverse", repo);
 
 	revs->blob_objects = tmp_blobs;
 	revs->tree_objects = tmp_trees;
@@ -1304,7 +1317,7 @@ static struct bitmap *find_boundary_objects(struct bitmap_index *bitmap_git,
 	/*
 	 * Then add the boundary commit(s) as fill-in traversal tips.
 	 */
-	trace2_region_enter("pack-bitmap", "boundary-fill-in", the_repository);
+	trace2_region_enter("pack-bitmap", "boundary-fill-in", repo);
 	for (i = 0; i < cb.boundary.nr; i++) {
 		struct object *obj = cb.boundary.objects[i].item;
 		if (bitmap_walk_contains(bitmap_git, cb.base, &obj->oid))
@@ -1314,7 +1327,7 @@ static struct bitmap *find_boundary_objects(struct bitmap_index *bitmap_git,
 	}
 	if (revs->pending.nr)
 		cb.base = fill_in_bitmap(bitmap_git, revs, cb.base, NULL);
-	trace2_region_leave("pack-bitmap", "boundary-fill-in", the_repository);
+	trace2_region_leave("pack-bitmap", "boundary-fill-in", repo);
 
 cleanup:
 	object_array_clear(&cb.boundary);
@@ -1718,7 +1731,8 @@ static unsigned long get_size_by_pos(struct bitmap_index *bitmap_git,
 			ofs = pack_pos_to_offset(pack, pos);
 		}
 
-		if (packed_object_info(the_repository, pack, ofs, &oi) < 0) {
+		if (packed_object_info(bitmap_repo(bitmap_git), pack, ofs,
+				       &oi) < 0) {
 			struct object_id oid;
 			nth_bitmap_object_oid(bitmap_git, &oid,
 					      pack_pos_to_index(pack, pos));
@@ -1727,7 +1741,8 @@ static unsigned long get_size_by_pos(struct bitmap_index *bitmap_git,
 	} else {
 		struct eindex *eindex = &bitmap_git->ext_index;
 		struct object *obj = eindex->objects[pos - bitmap_num_objects(bitmap_git)];
-		if (oid_object_info_extended(the_repository, &obj->oid, &oi, 0) < 0)
+		if (oid_object_info_extended(bitmap_repo(bitmap_git), &obj->oid,
+					     &oi, 0) < 0)
 			die(_("unable to get size of %s"), oid_to_hex(&obj->oid));
 	}
 
@@ -1889,7 +1904,8 @@ static void filter_packed_objects_from_bitmap(struct bitmap_index *bitmap_git,
 		bitmap_unset(result, i);
 
 	for (i = 0; i < eindex->count; ++i) {
-		if (has_object_pack(&eindex->objects[i]->oid))
+		if (has_object_pack(bitmap_repo(bitmap_git),
+				    &eindex->objects[i]->oid))
 			bitmap_unset(result, objects_nr + i);
 	}
 }
@@ -1907,6 +1923,7 @@ struct bitmap_index *prepare_bitmap_walk(struct rev_info *revs,
 	struct bitmap *haves_bitmap = NULL;
 
 	struct bitmap_index *bitmap_git;
+	struct repository *repo;
 
 	/*
 	 * We can't do pathspec limiting with bitmaps, because we don't know
@@ -1980,18 +1997,20 @@ struct bitmap_index *prepare_bitmap_walk(struct rev_info *revs,
 	if (!use_boundary_traversal)
 		object_array_clear(&revs->pending);
 
+	repo = bitmap_repo(bitmap_git);
+
 	if (haves) {
 		if (use_boundary_traversal) {
-			trace2_region_enter("pack-bitmap", "haves/boundary", the_repository);
+			trace2_region_enter("pack-bitmap", "haves/boundary", repo);
 			haves_bitmap = find_boundary_objects(bitmap_git, revs, haves);
-			trace2_region_leave("pack-bitmap", "haves/boundary", the_repository);
+			trace2_region_leave("pack-bitmap", "haves/boundary", repo);
 		} else {
-			trace2_region_enter("pack-bitmap", "haves/classic", the_repository);
+			trace2_region_enter("pack-bitmap", "haves/classic", repo);
 			revs->ignore_missing_links = 1;
 			haves_bitmap = find_objects(bitmap_git, revs, haves, NULL);
 			reset_revision_walk();
 			revs->ignore_missing_links = 0;
-			trace2_region_leave("pack-bitmap", "haves/classic", the_repository);
+			trace2_region_leave("pack-bitmap", "haves/classic", repo);
 		}
 
 		if (!haves_bitmap)
@@ -2025,17 +2044,17 @@ struct bitmap_index *prepare_bitmap_walk(struct rev_info *revs,
 	object_list_free(&wants);
 	object_list_free(&haves);
 
-	trace2_data_intmax("bitmap", the_repository, "pseudo_merges_satisfied",
+	trace2_data_intmax("bitmap", repo, "pseudo_merges_satisfied",
 			   pseudo_merges_satisfied_nr);
-	trace2_data_intmax("bitmap", the_repository, "pseudo_merges_cascades",
+	trace2_data_intmax("bitmap", repo, "pseudo_merges_cascades",
 			   pseudo_merges_cascades_nr);
-	trace2_data_intmax("bitmap", the_repository, "bitmap/hits",
+	trace2_data_intmax("bitmap", repo, "bitmap/hits",
 			   existing_bitmaps_hits_nr);
-	trace2_data_intmax("bitmap", the_repository, "bitmap/misses",
+	trace2_data_intmax("bitmap", repo, "bitmap/misses",
 			   existing_bitmaps_misses_nr);
-	trace2_data_intmax("bitmap", the_repository, "bitmap/roots_with_bitmap",
+	trace2_data_intmax("bitmap", repo, "bitmap/roots_with_bitmap",
 			   roots_with_bitmaps_nr);
-	trace2_data_intmax("bitmap", the_repository, "bitmap/roots_without_bitmap",
+	trace2_data_intmax("bitmap", repo, "bitmap/roots_without_bitmap",
 			   roots_without_bitmaps_nr);
 
 	return bitmap_git;
@@ -2256,7 +2275,7 @@ void reuse_partial_packfile_from_bitmap(struct bitmap_index *bitmap_git,
 					struct bitmap **reuse_out,
 					int multi_pack_reuse)
 {
-	struct repository *r = the_repository;
+	struct repository *r = bitmap_repo(bitmap_git);
 	struct bitmapped_pack *packs = NULL;
 	struct bitmap *result = bitmap_git->result;
 	struct bitmap *reuse;
@@ -2792,7 +2811,7 @@ int rebuild_bitmap(const uint32_t *reposition,
 uint32_t *create_bitmap_mapping(struct bitmap_index *bitmap_git,
 				struct packing_data *mapping)
 {
-	struct repository *r = the_repository;
+	struct repository *r = bitmap_repo(bitmap_git);
 	uint32_t i, num_objects;
 	uint32_t *reposition;
 
@@ -2948,7 +2967,8 @@ static off_t get_disk_usage_for_extended(struct bitmap_index *bitmap_git)
 				st_add(bitmap_num_objects(bitmap_git), i)))
 			continue;
 
-		if (oid_object_info_extended(the_repository, &obj->oid, &oi, 0) < 0)
+		if (oid_object_info_extended(bitmap_repo(bitmap_git), &obj->oid,
+					     &oi, 0) < 0)
 			die(_("unable to get disk usage of '%s'"),
 			    oid_to_hex(&obj->oid));
 

pack-objects.h

@@ -7,7 +7,8 @@
 
 struct repository;
 
-#define DEFAULT_DELTA_CACHE_SIZE (256 * 1024 * 1024)
+#define DEFAULT_DELTA_CACHE_SIZE       (256 * 1024 * 1024)
+#define DEFAULT_DELTA_BASE_CACHE_LIMIT (96 * 1024 * 1024)
 
 #define OE_DFS_STATE_BITS	2
 #define OE_DEPTH_BITS		12

pack-write.c

@@ -21,6 +21,7 @@ void reset_pack_idx_option(struct pack_idx_option *opts)
 	memset(opts, 0, sizeof(*opts));
 	opts->version = 2;
 	opts->off32_limit = 0x7fffffff;
+	opts->delta_base_cache_limit = DEFAULT_DELTA_BASE_CACHE_LIMIT;
 }
 
 static int sha1_compare(const void *_a, const void *_b)

pack.h

@@ -58,6 +58,8 @@ struct pack_idx_option {
 	 */
 	int anomaly_alloc, anomaly_nr;
 	uint32_t *anomaly;
+
+	size_t delta_base_cache_limit;
 };
 
 void reset_pack_idx_option(struct pack_idx_option *);

packfile.c

@@ -1,4 +1,3 @@
-#define USE_THE_REPOSITORY_VARIABLE
 
 #include "git-compat-util.h"
 #include "environment.h"
@@ -25,13 +24,12 @@
 #include "pack-revindex.h"
 #include "promisor-remote.h"
 
-char *odb_pack_name(struct strbuf *buf,
+char *odb_pack_name(struct repository *r, struct strbuf *buf,
-		    const unsigned char *hash,
+		    const unsigned char *hash, const char *ext)
-		    const char *ext)
 {
 	strbuf_reset(buf);
-	strbuf_addf(buf, "%s/pack/pack-%s.%s", repo_get_object_directory(the_repository),
+	strbuf_addf(buf, "%s/pack/pack-%s.%s", repo_get_object_directory(r),
-		    hash_to_hex(hash), ext);
+		    hash_to_hex_algop(hash, r->hash_algo), ext);
 	return buf->buf;
 }
 
@@ -47,15 +45,15 @@ static size_t pack_mapped;
 #define SZ_FMT PRIuMAX
 static inline uintmax_t sz_fmt(size_t s) { return s; }
 
-void pack_report(void)
+void pack_report(struct repository *repo)
 {
 	fprintf(stderr,
 		"pack_report: getpagesize()            = %10" SZ_FMT "\n"
 		"pack_report: core.packedGitWindowSize = %10" SZ_FMT "\n"
 		"pack_report: core.packedGitLimit      = %10" SZ_FMT "\n",
 		sz_fmt(getpagesize()),
-		sz_fmt(packed_git_window_size),
+		sz_fmt(repo->settings.packed_git_window_size),
-		sz_fmt(packed_git_limit));
+		sz_fmt(repo->settings.packed_git_limit));
 	fprintf(stderr,
 		"pack_report: pack_used_ctr            = %10u\n"
 		"pack_report: pack_mmap_calls          = %10u\n"
@@ -79,7 +77,7 @@ static int check_packed_git_idx(const char *path, struct packed_git *p)
 	size_t idx_size;
 	int fd = git_open(path), ret;
 	struct stat st;
-	const unsigned int hashsz = the_hash_algo->rawsz;
+	const unsigned int hashsz = p->repo->hash_algo->rawsz;
 
 	if (fd < 0)
 		return -1;
@@ -217,11 +215,12 @@ uint32_t get_pack_fanout(struct packed_git *p, uint32_t value)
 	return ntohl(level1_ofs[value]);
 }
 
-static struct packed_git *alloc_packed_git(int extra)
+static struct packed_git *alloc_packed_git(struct repository *r, int extra)
 {
 	struct packed_git *p = xmalloc(st_add(sizeof(*p), extra));
 	memset(p, 0, sizeof(*p));
 	p->pack_fd = -1;
+	p->repo = r;
 	return p;
 }
 
@@ -233,15 +232,16 @@ static char *pack_path_from_idx(const char *idx_path)
 	return xstrfmt("%.*s.pack", (int)len, idx_path);
 }
 
-struct packed_git *parse_pack_index(unsigned char *sha1, const char *idx_path)
+struct packed_git *parse_pack_index(struct repository *r, unsigned char *sha1,
+				    const char *idx_path)
 {
 	char *path = pack_path_from_idx(idx_path);
 	size_t alloc = st_add(strlen(path), 1);
-	struct packed_git *p = alloc_packed_git(alloc);
+	struct packed_git *p = alloc_packed_git(r, alloc);
 
 	memcpy(p->pack_name, path, alloc); /* includes NUL */
 	free(path);
-	hashcpy(p->hash, sha1, the_repository->hash_algo);
+	hashcpy(p->hash, sha1, p->repo->hash_algo);
 	if (check_packed_git_idx(idx_path, p)) {
 		free(p);
 		return NULL;
@@ -276,7 +276,7 @@ static int unuse_one_window(struct packed_git *current)
 
 	if (current)
 		scan_windows(current, &lru_p, &lru_w, &lru_l);
-	for (p = the_repository->objects->packed_git; p; p = p->next)
+	for (p = current->repo->objects->packed_git; p; p = p->next)
 		scan_windows(p, &lru_p, &lru_w, &lru_l);
 	if (lru_p) {
 		munmap(lru_w->base, lru_w->len);
@@ -458,13 +458,13 @@ static void find_lru_pack(struct packed_git *p, struct packed_git **lru_p, struc
 	*accept_windows_inuse = has_windows_inuse;
 }
 
-static int close_one_pack(void)
+static int close_one_pack(struct repository *r)
 {
 	struct packed_git *p, *lru_p = NULL;
 	struct pack_window *mru_w = NULL;
 	int accept_windows_inuse = 1;
 
-	for (p = the_repository->objects->packed_git; p; p = p->next) {
+	for (p = r->objects->packed_git; p; p = p->next) {
 		if (p->pack_fd == -1)
 			continue;
 		find_lru_pack(p, &lru_p, &mru_w, &accept_windows_inuse);
@@ -538,7 +538,7 @@ static int open_packed_git_1(struct packed_git *p)
 	unsigned char hash[GIT_MAX_RAWSZ];
 	unsigned char *idx_hash;
 	ssize_t read_result;
-	const unsigned hashsz = the_hash_algo->rawsz;
+	const unsigned hashsz = p->repo->hash_algo->rawsz;
 
 	if (open_pack_index(p))
 		return error("packfile %s index unavailable", p->pack_name);
@@ -553,7 +553,7 @@ static int open_packed_git_1(struct packed_git *p)
 			pack_max_fds = 1;
 	}
 
-	while (pack_max_fds <= pack_open_fds && close_one_pack())
+	while (pack_max_fds <= pack_open_fds && close_one_pack(p->repo))
 		; /* nothing */
 
 	p->pack_fd = git_open(p->pack_name);
@@ -595,7 +595,7 @@ static int open_packed_git_1(struct packed_git *p)
 	if (read_result != hashsz)
 		return error("packfile %s signature is unavailable", p->pack_name);
 	idx_hash = ((unsigned char *)p->index_data) + p->index_size - hashsz * 2;
-	if (!hasheq(hash, idx_hash, the_repository->hash_algo))
+	if (!hasheq(hash, idx_hash, p->repo->hash_algo))
 		return error("packfile %s does not match index", p->pack_name);
 	return 0;
 }
@@ -608,7 +608,8 @@ static int open_packed_git(struct packed_git *p)
 	return -1;
 }
 
-static int in_window(struct pack_window *win, off_t offset)
+static int in_window(struct repository *r, struct pack_window *win,
+		     off_t offset)
 {
 	/* We must promise at least one full hash after the
 	 * offset is available from this window, otherwise the offset
@@ -618,7 +619,7 @@ static int in_window(struct pack_window *win, off_t offset)
 	 */
 	off_t win_off = win->offset;
 	return win_off <= offset
-		&& (offset + the_hash_algo->rawsz) <= (win_off + win->len);
+		&& (offset + r->hash_algo->rawsz) <= (win_off + win->len);
 }
 
 unsigned char *use_pack(struct packed_git *p,
@@ -635,21 +636,28 @@ unsigned char *use_pack(struct packed_git *p,
 	 */
 	if (!p->pack_size && p->pack_fd == -1 && open_packed_git(p))
 		die("packfile %s cannot be accessed", p->pack_name);
-	if (offset > (p->pack_size - the_hash_algo->rawsz))
+	if (offset > (p->pack_size - p->repo->hash_algo->rawsz))
 		die("offset beyond end of packfile (truncated pack?)");
 	if (offset < 0)
 		die(_("offset before end of packfile (broken .idx?)"));
 
-	if (!win || !in_window(win, offset)) {
+	if (!win || !in_window(p->repo, win, offset)) {
 		if (win)
 			win->inuse_cnt--;
 		for (win = p->windows; win; win = win->next) {
-			if (in_window(win, offset))
+			if (in_window(p->repo, win, offset))
 				break;
 		}
 		if (!win) {
-			size_t window_align = packed_git_window_size / 2;
+			size_t window_align;
 			off_t len;
+			struct repo_settings *settings;
+
+			/* lazy load the settings in case it hasn't been setup */
+			prepare_repo_settings(p->repo);
+			settings = &p->repo->settings;
+
+			window_align = settings->packed_git_window_size / 2;
 
 			if (p->pack_fd == -1 && open_packed_git(p))
 				die("packfile %s cannot be accessed", p->pack_name);
@@ -657,11 +665,12 @@ unsigned char *use_pack(struct packed_git *p,
 			CALLOC_ARRAY(win, 1);
 			win->offset = (offset / window_align) * window_align;
 			len = p->pack_size - win->offset;
-			if (len > packed_git_window_size)
+			if (len > settings->packed_git_window_size)
-				len = packed_git_window_size;
+				len = settings->packed_git_window_size;
 			win->len = (size_t)len;
 			pack_mapped += win->len;
-			while (packed_git_limit < pack_mapped
+
+			while (settings->packed_git_limit < pack_mapped
 				&& unuse_one_window(p))
 				; /* nothing */
 			win->base = xmmap_gently(NULL, win->len,
@@ -703,11 +712,13 @@ void unuse_pack(struct pack_window **w_cursor)
 	}
 }
 
-struct packed_git *add_packed_git(const char *path, size_t path_len, int local)
+struct packed_git *add_packed_git(struct repository *r, const char *path,
+				  size_t path_len, int local)
 {
 	struct stat st;
 	size_t alloc;
 	struct packed_git *p;
+	struct object_id oid;
 
 	/*
 	 * Make sure a corresponding .pack file exists and that
@@ -721,7 +732,7 @@ struct packed_git *add_packed_git(const char *path, size_t path_len, int local)
 	 * the use xsnprintf double-checks that)
 	 */
 	alloc = st_add3(path_len, strlen(".promisor"), 1);
-	p = alloc_packed_git(alloc);
+	p = alloc_packed_git(r, alloc);
 	memcpy(p->pack_name, path, path_len);
 
 	xsnprintf(p->pack_name + path_len, alloc - path_len, ".keep");
@@ -748,9 +759,13 @@ struct packed_git *add_packed_git(const char *path, size_t path_len, int local)
 	p->pack_size = st.st_size;
 	p->pack_local = local;
 	p->mtime = st.st_mtime;
-	if (path_len < the_hash_algo->hexsz ||
+	if (path_len < r->hash_algo->hexsz ||
-	    get_hash_hex(path + path_len - the_hash_algo->hexsz, p->hash))
+	    get_oid_hex_algop(path + path_len - r->hash_algo->hexsz, &oid,
-		hashclr(p->hash, the_repository->hash_algo);
+			      r->hash_algo))
+		hashclr(p->hash, r->hash_algo);
+	else
+		hashcpy(p->hash, oid.hash, r->hash_algo);
+
 	return p;
 }
 
@@ -877,7 +892,7 @@ static void prepare_pack(const char *full_name, size_t full_name_len,
 
 		/* Don't reopen a pack we already have. */
 		if (!hashmap_get(&data->r->objects->pack_map, &hent, pack_name)) {
-			p = add_packed_git(full_name, full_name_len, data->local);
+			p = add_packed_git(data->r, full_name, full_name_len, data->local);
 			if (p)
 				install_packed_git(data->r, p);
 		}
@@ -1240,9 +1255,9 @@ off_t get_delta_base(struct packed_git *p,
 	} else if (type == OBJ_REF_DELTA) {
 		/* The base entry _must_ be in the same pack */
 		struct object_id oid;
-		oidread(&oid, base_info, the_repository->hash_algo);
+		oidread(&oid, base_info, p->repo->hash_algo);
 		base_offset = find_pack_entry_one(&oid, p);
-		*curpos += the_hash_algo->rawsz;
+		*curpos += p->repo->hash_algo->rawsz;
 	} else
 		die("I am totally screwed");
 	return base_offset;
@@ -1263,7 +1278,7 @@ static int get_delta_base_oid(struct packed_git *p,
 {
 	if (type == OBJ_REF_DELTA) {
 		unsigned char *base = use_pack(p, w_curs, curpos, NULL);
-		oidread(oid, base, the_repository->hash_algo);
+		oidread(oid, base, p->repo->hash_algo);
 		return 0;
 	} else if (type == OBJ_OFS_DELTA) {
 		uint32_t base_pos;
@@ -1488,7 +1503,9 @@ void clear_delta_base_cache(void)
 }
 
 static void add_delta_base_cache(struct packed_git *p, off_t base_offset,
-	void *base, unsigned long base_size, enum object_type type)
+				 void *base, unsigned long base_size,
+				 unsigned long delta_base_cache_limit,
+				 enum object_type type)
 {
 	struct delta_base_cache_entry *ent;
 	struct list_head *lru, *tmp;
@@ -1605,7 +1622,7 @@ int packed_object_info(struct repository *r, struct packed_git *p,
 				goto out;
 			}
 		} else
-			oidclr(oi->delta_base_oid, the_repository->hash_algo);
+			oidclr(oi->delta_base_oid, p->repo->hash_algo);
 	}
 
 	oi->whence = in_delta_base_cache(p, obj_offset) ? OI_DBCACHED :
@@ -1690,6 +1707,8 @@ void *unpack_entry(struct repository *r, struct packed_git *p, off_t obj_offset,
 	int delta_stack_nr = 0, delta_stack_alloc = UNPACK_ENTRY_STACK_PREALLOC;
 	int base_from_cache = 0;
 
+	prepare_repo_settings(p->repo);
+
 	write_pack_access_log(p, obj_offset);
 
 	/* PHASE 1: drill down to the innermost base object */
@@ -1870,7 +1889,9 @@ void *unpack_entry(struct repository *r, struct packed_git *p, off_t obj_offset,
 		 * before we are done using it.
 		 */
 		if (!external_base)
-			add_delta_base_cache(p, base_obj_offset, base, base_size, type);
+			add_delta_base_cache(p, base_obj_offset, base, base_size,
+					     p->repo->settings.delta_base_cache_limit,
+					     type);
 
 		free(delta_data);
 		free(external_base);
@@ -1894,7 +1915,7 @@ int bsearch_pack(const struct object_id *oid, const struct packed_git *p, uint32
 {
 	const unsigned char *index_fanout = p->index_data;
 	const unsigned char *index_lookup;
-	const unsigned int hashsz = the_hash_algo->rawsz;
+	const unsigned int hashsz = p->repo->hash_algo->rawsz;
 	int index_lookup_width;
 
 	if (!index_fanout)
@@ -1919,7 +1940,7 @@ int nth_packed_object_id(struct object_id *oid,
 			 uint32_t n)
 {
 	const unsigned char *index = p->index_data;
-	const unsigned int hashsz = the_hash_algo->rawsz;
+	const unsigned int hashsz = p->repo->hash_algo->rawsz;
 	if (!index) {
 		if (open_pack_index(p))
 			return -1;
@@ -1930,11 +1951,10 @@ int nth_packed_object_id(struct object_id *oid,
 	index += 4 * 256;
 	if (p->index_version == 1) {
 		oidread(oid, index + st_add(st_mult(hashsz + 4, n), 4),
-			the_repository->hash_algo);
+			p->repo->hash_algo);
 	} else {
 		index += 8;
-		oidread(oid, index + st_mult(hashsz, n),
+		oidread(oid, index + st_mult(hashsz, n), p->repo->hash_algo);
-			the_repository->hash_algo);
 	}
 	return 0;
 }
@@ -1956,7 +1976,7 @@ void check_pack_index_ptr(const struct packed_git *p, const void *vptr)
 off_t nth_packed_object_offset(const struct packed_git *p, uint32_t n)
 {
 	const unsigned char *index = p->index_data;
-	const unsigned int hashsz = the_hash_algo->rawsz;
+	const unsigned int hashsz = p->repo->hash_algo->rawsz;
 	index += 4 * 256;
 	if (p->index_version == 1) {
 		return ntohl(*((uint32_t *)(index + st_mult(hashsz + 4, n))));
@@ -2136,16 +2156,17 @@ int find_kept_pack_entry(struct repository *r,
 	return 0;
 }
 
-int has_object_pack(const struct object_id *oid)
+int has_object_pack(struct repository *r, const struct object_id *oid)
 {
 	struct pack_entry e;
-	return find_pack_entry(the_repository, oid, &e);
+	return find_pack_entry(r, oid, &e);
 }
 
-int has_object_kept_pack(const struct object_id *oid, unsigned flags)
+int has_object_kept_pack(struct repository *r, const struct object_id *oid,
+			 unsigned flags)
 {
 	struct pack_entry e;
-	return find_kept_pack_entry(the_repository, oid, flags, &e);
+	return find_kept_pack_entry(r, oid, flags, &e);
 }
 
 int for_each_object_in_pack(struct packed_git *p,
@@ -2156,7 +2177,7 @@ int for_each_object_in_pack(struct packed_git *p,
 	int r = 0;
 
 	if (flags & FOR_EACH_OBJECT_PACK_ORDER) {
-		if (load_pack_revindex(the_repository, p))
+		if (load_pack_revindex(p->repo, p))
 			return -1;
 	}
 
@@ -2192,15 +2213,14 @@ int for_each_object_in_pack(struct packed_git *p,
 	return r;
 }
 
-int for_each_packed_object(each_packed_object_fn cb, void *data,
+int for_each_packed_object(struct repository *repo, each_packed_object_fn cb,
-			   enum for_each_object_flags flags)
+			   void *data, enum for_each_object_flags flags)
 {
 	struct packed_git *p;
 	int r = 0;
 	int pack_errors = 0;
 
-	prepare_packed_git(the_repository);
+	for (p = get_all_packs(repo); p; p = p->next) {
-	for (p = get_all_packs(the_repository); p; p = p->next) {
 		if ((flags & FOR_EACH_OBJECT_LOCAL_ONLY) && !p->pack_local)
 			continue;
 		if ((flags & FOR_EACH_OBJECT_PROMISOR_ONLY) &&
@@ -2224,7 +2244,7 @@ int for_each_packed_object(each_packed_object_fn cb, void *data,
 }
 
 static int add_promisor_object(const struct object_id *oid,
-			       struct packed_git *pack UNUSED,
+			       struct packed_git *pack,
 			       uint32_t pos UNUSED,
 			       void *set_)
 {
@@ -2232,12 +2252,12 @@ static int add_promisor_object(const struct object_id *oid,
 	struct object *obj;
 	int we_parsed_object;
 
-	obj = lookup_object(the_repository, oid);
+	obj = lookup_object(pack->repo, oid);
 	if (obj && obj->parsed) {
 		we_parsed_object = 0;
 	} else {
 		we_parsed_object = 1;
-		obj = parse_object(the_repository, oid);
+		obj = parse_object(pack->repo, oid);
 	}
 
 	if (!obj)
@@ -2278,14 +2298,14 @@ static int add_promisor_object(const struct object_id *oid,
 	return 0;
 }
 
-int is_promisor_object(const struct object_id *oid)
+int is_promisor_object(struct repository *r, const struct object_id *oid)
 {
 	static struct oidset promisor_objects;
 	static int promisor_objects_prepared;
 
 	if (!promisor_objects_prepared) {
-		if (repo_has_promisor_remote(the_repository)) {
+		if (repo_has_promisor_remote(r)) {
-			for_each_packed_object(add_promisor_object,
+			for_each_packed_object(r, add_promisor_object,
 					       &promisor_objects,
 					       FOR_EACH_OBJECT_PROMISOR_ONLY |
 					       FOR_EACH_OBJECT_PACK_ORDER);

packfile.h

@@ -29,7 +29,8 @@ struct pack_entry {
  *
  * Example: odb_pack_name(out, sha1, "idx") => ".git/objects/pack/pack-1234..idx"
  */
-char *odb_pack_name(struct strbuf *buf, const unsigned char *sha1, const char *ext);
+char *odb_pack_name(struct repository *r, struct strbuf *buf,
+		    const unsigned char *hash, const char *ext);
 
 /*
  * Return the basename of the packfile, omitting any containing directory
@@ -46,7 +47,8 @@ const char *pack_basename(struct packed_git *p);
  * and does not add the resulting packed_git struct to the internal list of
  * packs. You probably want add_packed_git() instead.
  */
-struct packed_git *parse_pack_index(unsigned char *sha1, const char *idx_path);
+struct packed_git *parse_pack_index(struct repository *r, unsigned char *sha1,
+				    const char *idx_path);
 
 typedef void each_file_in_pack_dir_fn(const char *full_path, size_t full_path_len,
 				      const char *file_name, void *data);
@@ -87,7 +89,7 @@ unsigned long repo_approximate_object_count(struct repository *r);
 struct packed_git *find_oid_pack(const struct object_id *oid,
 				 struct packed_git *packs);
 
-void pack_report(void);
+void pack_report(struct repository *repo);
 
 /*
  * mmap the index file for the specified packfile (if it is not
@@ -113,7 +115,8 @@ void close_pack(struct packed_git *);
 void close_object_store(struct raw_object_store *o);
 void unuse_pack(struct pack_window **);
 void clear_delta_base_cache(void);
-struct packed_git *add_packed_git(const char *path, size_t path_len, int local);
+struct packed_git *add_packed_git(struct repository *r, const char *path,
+				  size_t path_len, int local);
 
 /*
  * Unlink the .pack and associated extension files.
@@ -190,14 +193,15 @@ const struct packed_git *has_packed_and_bad(struct repository *, const struct ob
 int find_pack_entry(struct repository *r, const struct object_id *oid, struct pack_entry *e);
 int find_kept_pack_entry(struct repository *r, const struct object_id *oid, unsigned flags, struct pack_entry *e);
 
-int has_object_pack(const struct object_id *oid);
+int has_object_pack(struct repository *r, const struct object_id *oid);
-int has_object_kept_pack(const struct object_id *oid, unsigned flags);
+int has_object_kept_pack(struct repository *r, const struct object_id *oid,
+			 unsigned flags);
 
 /*
  * Return 1 if an object in a promisor packfile is or refers to the given
  * object, 0 otherwise.
  */
-int is_promisor_object(const struct object_id *oid);
+int is_promisor_object(struct repository *r, const struct object_id *oid);
 
 /*
  * Expose a function for fuzz testing.

promisor-remote.c

@@ -283,7 +283,7 @@ void promisor_remote_get_direct(struct repository *repo,
 	}
 
 	for (i = 0; i < remaining_nr; i++) {
-		if (is_promisor_object(&remaining_oids[i]))
+		if (is_promisor_object(repo, &remaining_oids[i]))
 			die(_("could not fetch %s from promisor remote"),
 			    oid_to_hex(&remaining_oids[i]));
 	}

prune-packed.c

@@ -24,7 +24,7 @@ static int prune_object(const struct object_id *oid, const char *path,
 {
 	int *opts = data;
 
-	if (!has_object_pack(oid))
+	if (!has_object_pack(the_repository, oid))
 		return 0;
 
 	if (*opts & PRUNE_PACKED_DRY_RUN)

reachable.c

@@ -239,7 +239,7 @@ static int want_recent_object(struct recent_data *data,
 			      const struct object_id *oid)
 {
 	if (data->ignore_in_core_kept_packs &&
-	    has_object_kept_pack(oid, IN_CORE_KEEP_PACKS))
+	    has_object_kept_pack(data->revs->repo, oid, IN_CORE_KEEP_PACKS))
 		return 0;
 	return 1;
 }
@@ -324,7 +324,7 @@ int add_unseen_recent_objects_to_traversal(struct rev_info *revs,
 	if (ignore_in_core_kept_packs)
 		flags |= FOR_EACH_OBJECT_SKIP_IN_CORE_KEPT_PACKS;
 
-	r = for_each_packed_object(add_recent_packed, &data, flags);
+	r = for_each_packed_object(revs->repo, add_recent_packed, &data, flags);
 
 done:
 	oidset_clear(&data.extra_recent_oids);

repo-settings.c

@@ -3,6 +3,7 @@
 #include "repo-settings.h"
 #include "repository.h"
 #include "midx.h"
+#include "pack-objects.h"
 
 static void repo_cfg_bool(struct repository *r, const char *key, int *dest,
 			  int def)
@@ -26,6 +27,7 @@ void prepare_repo_settings(struct repository *r)
 	const char *strval;
 	int manyfiles;
 	int read_changed_paths;
+	unsigned long ulongval;
 
 	if (!r->gitdir)
 		BUG("Cannot add settings for uninitialized repository");
@@ -123,6 +125,22 @@ void prepare_repo_settings(struct repository *r)
 	 * removed.
 	 */
 	r->settings.command_requires_full_index = 1;
+
+	if (!repo_config_get_ulong(r, "core.deltabasecachelimit", &ulongval))
+		r->settings.delta_base_cache_limit = ulongval;
+
+	if (!repo_config_get_ulong(r, "core.packedgitwindowsize", &ulongval)) {
+		int pgsz_x2 = getpagesize() * 2;
+
+		/* This value must be multiple of (pagesize * 2) */
+		ulongval /= pgsz_x2;
+		if (ulongval < 1)
+			ulongval = 1;
+		r->settings.packed_git_window_size = ulongval * pgsz_x2;
+	}
+
+	if (!repo_config_get_ulong(r, "core.packedgitlimit", &ulongval))
+		r->settings.packed_git_limit = ulongval;
 }
 
 enum log_refs_config repo_settings_get_log_all_ref_updates(struct repository *repo)

repo-settings.h

@@ -57,12 +57,19 @@ struct repo_settings {
 
 	int core_multi_pack_index;
 	int warn_ambiguous_refs; /* lazily loaded via accessor */
+
+	size_t delta_base_cache_limit;
+	size_t packed_git_window_size;
+	size_t packed_git_limit;
 };
 #define REPO_SETTINGS_INIT { \
 	.index_version = -1, \
 	.core_untracked_cache = UNTRACKED_CACHE_KEEP, \
 	.fetch_negotiation_algorithm = FETCH_NEGOTIATION_CONSECUTIVE, \
 	.warn_ambiguous_refs = -1, \
+	.delta_base_cache_limit = DEFAULT_DELTA_BASE_CACHE_LIMIT, \
+	.packed_git_window_size = DEFAULT_PACKED_GIT_WINDOW_SIZE, \
+	.packed_git_limit = DEFAULT_PACKED_GIT_LIMIT, \
 }
 
 void prepare_repo_settings(struct repository *r);

revision.c

@@ -390,7 +390,8 @@ static struct object *get_reference(struct rev_info *revs, const char *name,
 	if (!object) {
 		if (revs->ignore_missing)
 			return NULL;
-		if (revs->exclude_promisor_objects && is_promisor_object(oid))
+		if (revs->exclude_promisor_objects &&
+		    is_promisor_object(revs->repo, oid))
 			return NULL;
 		if (revs->do_not_die_on_missing_objects) {
 			oidset_insert(&revs->missing_commits, oid);
@@ -432,7 +433,7 @@ static struct commit *handle_commit(struct rev_info *revs,
 			if (revs->ignore_missing_links || (flags & UNINTERESTING))
 				return NULL;
 			if (revs->exclude_promisor_objects &&
-			    is_promisor_object(&tag->tagged->oid))
+			    is_promisor_object(revs->repo, &tag->tagged->oid))
 				return NULL;
 			if (revs->do_not_die_on_missing_objects && oid) {
 				oidset_insert(&revs->missing_commits, oid);
@@ -1211,7 +1212,7 @@ static int process_parents(struct rev_info *revs, struct commit *commit,
 			     revs->do_not_die_on_missing_objects;
 		if (repo_parse_commit_gently(revs->repo, p, gently) < 0) {
 			if (revs->exclude_promisor_objects &&
-			    is_promisor_object(&p->object.oid)) {
+			    is_promisor_object(revs->repo, &p->object.oid)) {
 				if (revs->first_parent_only)
 					break;
 				continue;
@@ -3920,7 +3921,7 @@ int prepare_revision_walk(struct rev_info *revs)
 		revs->treesame.name = "treesame";
 
 	if (revs->exclude_promisor_objects) {
-		for_each_packed_object(mark_uninteresting, revs,
+		for_each_packed_object(revs->repo, mark_uninteresting, revs,
 				       FOR_EACH_OBJECT_PROMISOR_ONLY);
 	}
 
@@ -4108,10 +4109,10 @@ enum commit_action get_commit_action(struct rev_info *revs, struct commit *commi
 {
 	if (commit->object.flags & SHOWN)
 		return commit_ignore;
-	if (revs->unpacked && has_object_pack(&commit->object.oid))
+	if (revs->unpacked && has_object_pack(revs->repo, &commit->object.oid))
 		return commit_ignore;
 	if (revs->no_kept_objects) {
-		if (has_object_kept_pack(&commit->object.oid,
+		if (has_object_kept_pack(revs->repo, &commit->object.oid,
 					 revs->keep_pack_cache_flags))
 			return commit_ignore;
 	}

tag.c

@@ -84,7 +84,7 @@ struct object *deref_tag(struct repository *r, struct object *o, const char *war
 			o = NULL;
 		}
 	if (!o && warn) {
-		if (last_oid && is_promisor_object(last_oid))
+		if (last_oid && is_promisor_object(r, last_oid))
 			return NULL;
 		if (!warnlen)
 			warnlen = strlen(warn);