D27097.id79221.diff
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	Index: head/sys/kern/kern_malloc.c
	===================================================================
	--- head/sys/kern/kern_malloc.c
	+++ head/sys/kern/kern_malloc.c
	@@ -1031,6 +1031,23 @@
	}

	/*
	+ * malloc_size: returns the number of bytes allocated for a request of the
	+ * specified size
	+ */
	+size_t
	+malloc_size(size_t size)
	+{
	+ int indx;
	+
	+ if (size > kmem_zmax)
	+ return (0);
	+ if (size & KMEM_ZMASK)
	+ size = (size & ~KMEM_ZMASK) + KMEM_ZBASE;
	+ indx = kmemsize[size >> KMEM_ZSHIFT];
	+ return (kmemzones[indx].kz_size);
	+}
	+
	+/*
	* malloc_usable_size: returns the usable size of the allocation.
	*/
	size_t
	Index: head/sys/sys/malloc.h
	===================================================================
	--- head/sys/sys/malloc.h
	+++ head/sys/sys/malloc.h
	@@ -250,6 +250,7 @@
	void malloc_type_freed(struct malloc_type *type, unsigned long size);
	void malloc_type_list(malloc_type_list_func_t , void );
	void malloc_uninit(void *);
	+size_t malloc_size(size_t);
	size_t malloc_usable_size(const void *);
	void realloc(void addr, size_t size, struct malloc_type *type, int flags)
	__result_use_check __alloc_size(2);