vfs_caches_init

Linux v6.6: fs/dcache.c
Linux v6.6: fs/inode.c
Linux v6.6: fs/file_table.c
Linux v6.6: fs/namespace.c

/* SLAB cache for __getname() consumers */
struct kmem_cache *names_cachep __read_mostly;
EXPORT_SYMBOL(names_cachep);

void __init vfs_caches_init_early(void)
{
	int i;

	for (i = 0; i < ARRAY_SIZE(in_lookup_hashtable); i++)
		INIT_HLIST_BL_HEAD(&in_lookup_hashtable[i]);

	dcache_init_early();
	inode_init_early();
}

void __init vfs_caches_init(void)
{
	names_cachep = kmem_cache_create_usercopy("names_cache", PATH_MAX, 0,
			SLAB_HWCACHE_ALIGN|SLAB_PANIC, 0, PATH_MAX, NULL);

	dcache_init();
	inode_init();
	files_init();
	files_maxfiles_init();
	mnt_init();
	bdev_cache_init();
	chrdev_init();
}

	dhash_entries = simple_strtoul(str, &str, 0);
	return 1;
}
__setup("dhash_entries=", set_dhash_entries);

static void __init dcache_init_early(void)
{
	/* If hashes are distributed across NUMA nodes, defer
	 * hash allocation until vmalloc space is available.
	 */
	if (hashdist)
		return;

	dentry_hashtable =
		alloc_large_system_hash("Dentry cache",
					sizeof(struct hlist_bl_head),
					dhash_entries,
					13,
					HASH_EARLY | HASH_ZERO,
					&d_hash_shift,
					NULL,
					0,
					0);
	d_hash_shift = 32 - d_hash_shift;
}

static void __init dcache_init(void)
{
	/*
	 * A constructor could be added for stable state like the lists,
	 * but it is probably not worth it because of the cache nature
	 * of the dcache.
	 */
	dentry_cache = KMEM_CACHE_USERCOPY(dentry,
		SLAB_RECLAIM_ACCOUNT|SLAB_PANIC|SLAB_MEM_SPREAD|SLAB_ACCOUNT,
		d_iname);

	/* Hash may have been set up in dcache_init_early */
	if (!hashdist)
		return;

	dentry_hashtable =
		alloc_large_system_hash("Dentry cache",
					sizeof(struct hlist_bl_head),
					dhash_entries,
					13,
					HASH_ZERO,
					&d_hash_shift,
					NULL,
					0,
					0);
	d_hash_shift = 32 - d_hash_shift;
}