diff --git a/jemalloc/Makefile.in b/jemalloc/Makefile.in
index 0795d3aa..f2a64539 100644
--- a/jemalloc/Makefile.in
+++ b/jemalloc/Makefile.in
@@ -58,7 +58,8 @@ DSOS := @objroot@lib/libjemalloc@install_suffix@.$(SO).$(REV) \
 	@objroot@lib/libjemalloc@install_suffix@.$(SO) \
 	@objroot@lib/libjemalloc@install_suffix@_pic.a
 MAN3 := @objroot@doc/jemalloc@install_suffix@.3
-CTESTS := @srcroot@test/posix_memalign.c @srcroot@test/thread_arena.c
+CTESTS := @srcroot@test/allocm.c @srcroot@test/posix_memalign.c \
+	@srcroot@test/rallocm.c @srcroot@test/thread_arena.c
 
 .PHONY: all dist install check clean distclean relclean
 
diff --git a/jemalloc/doc/jemalloc.3.in b/jemalloc/doc/jemalloc.3.in
index 138234ae..9dc4b250 100644
--- a/jemalloc/doc/jemalloc.3.in
+++ b/jemalloc/doc/jemalloc.3.in
@@ -38,7 +38,7 @@
 .\"     @(#)malloc.3	8.1 (Berkeley) 6/4/93
 .\" $FreeBSD: head/lib/libc/stdlib/malloc.3 182225 2008-08-27 02:00:53Z jasone $
 .\"
-.Dd September 11, 2010
+.Dd September 17, 2010
 .Dt JEMALLOC 3
 .Os
 .Sh NAME
@@ -51,13 +51,18 @@
 .Nm @jemalloc_prefix@malloc_stats_print ,
 .Nm @jemalloc_prefix@mallctl ,
 .Nm @jemalloc_prefix@mallctlnametomib ,
-.Nm @jemalloc_prefix@mallctlbymib
+.Nm @jemalloc_prefix@mallctlbymib ,
+.Nm @jemalloc_prefix@allocm ,
+.Nm @jemalloc_prefix@rallocm ,
+.Nm @jemalloc_prefix@sallocm ,
+.Nm @jemalloc_prefix@dallocm
 .Nd general purpose memory allocation functions
 .Sh LIBRARY
 .Sy libjemalloc@install_suffix@
 .Sh SYNOPSIS
 .In stdlib.h
 .In jemalloc/jemalloc@install_suffix@.h
+.Ss Standard API
 .Ft void *
 .Fn @jemalloc_prefix@malloc "size_t size"
 .Ft void *
@@ -68,6 +73,7 @@
 .Fn @jemalloc_prefix@realloc "void *ptr" "size_t size"
 .Ft void
 .Fn @jemalloc_prefix@free "void *ptr"
+.Ss Non-standard API
 .Ft size_t
 .Fn @jemalloc_prefix@malloc_usable_size "const void *ptr"
 .Ft void
@@ -82,7 +88,17 @@
 .Va @jemalloc_prefix@malloc_options ;
 .Ft void
 .Fn \*(lp*@jemalloc_prefix@malloc_message\*(rp "void *cbopaque" "const char *s"
+.Ss Experimental API
+.Ft int
+.Fn @jemalloc_prefix@allocm "void **ptr" "size_t *rsize" "size_t size" "int flags"
+.Ft int
+.Fn @jemalloc_prefix@rallocm "void **ptr" "size_t *rsize" "size_t size" "size_t extra" "int flags"
+.Ft int
+.Fn @jemalloc_prefix@sallocm "const void *ptr" "size_t *rsize" "int flags"
+.Ft int
+.Fn @jemalloc_prefix@dallocm "void *ptr" "int flags"
 .Sh DESCRIPTION
+.Ss Standard API
 The
 .Fn @jemalloc_prefix@malloc
 function allocates
@@ -158,7 +174,7 @@ If
 is
 .Dv NULL ,
 no action occurs.
-.Pp
+.Ss Non-standard API
 The
 .Fn @jemalloc_prefix@malloc_usable_size
 function returns the usable size of the allocation pointed to by
@@ -289,6 +305,102 @@ for (i = 0; i < nbins; i++) {
 	/* Do something with bin_size... */
 }
 .Ed
+.Ss Experimental API
+The experimental API is subject to change or removal without regard for
+backward compatibility.
+.Pp
+The
+.Fn @jemalloc_prefix@allocm ,
+.Fn @jemalloc_prefix@rallocm ,
+.Fn @jemalloc_prefix@sallocm ,
+and
+.Fn @jemalloc_prefix@dallocm
+functions all have a
+.Fa flags
+argument that can be used to specify options.
+The functions only check the options that are contextually relevant.
+Use bitwise or (|) operations to specify one or more of the following:
+.Bl -tag -width ".Dv ALLOCM_LG_ALIGN(la)"
+.It ALLOCM_LG_ALIGN(la)
+Align the memory allocation to start at an address that is a multiple of
+(1 <<
+.Fa la ) .
+This macro does not validate that
+.Fa la
+is within the valid range.
+.It ALLOCM_ALIGN(a)
+Align the memory allocation to start at an address that is a multiple of
+.Fa a ,
+where
+.Fa a
+is a power of two.
+This macro does not validate that
+.Fa a
+is a power of 2.
+.It ALLOCM_ZERO
+Initialize newly allocated memory to contain zero bytes.
+In the growing reallocation case, the real size prior to reallocation defines
+the boundary between untouched bytes and those that are initialized to contain
+zero bytes.
+If this option is absent, newly allocated memory is uninitialized.
+.It ALLOCM_NO_MOVE
+For reallocation, fail rather than moving the object.
+This constraint can apply to both growth and shrinkage.
+.El
+.Pp
+The
+.Fn @jemalloc_prefix@allocm
+function allocates at least
+.Fa size
+bytes of memory, sets
+.Fa *ptr
+to the base address of the allocation, and sets
+.Fa *rsize
+to the real size of the allocation if
+.Fa rsize
+is not
+.Dv NULL .
+.Pp
+The
+.Fn @jemalloc_prefix@rallocm
+function resizes the allocation at
+.Fa *ptr
+to be at least
+.Fa size
+bytes, sets
+.Fa *ptr
+to the base address of the allocation if it moved, and sets
+.Fa *rsize
+to the real size of the allocation if
+.Fa rsize
+is not
+.Dv NULL .
+If
+.Fa extra
+is non-zero, an attempt is made to resize the allocation to be at least
+.Fa ( size
++
+.Fa extra )
+bytes, though an inability to allocate the extra byte(s) will not by itself
+result in failure.
+Behavior is undefined if
+.Fa ( size
++
+.Fa extra
+>
+.Dv SIZE_T_MAX ) .
+.Pp
+The
+.Fn @jemalloc_prefix@sallocm
+function sets
+.Fa *rsize
+to the real size of the allocation.
+.Pp
+The
+.Fn @jemalloc_prefix@dallocm
+function causes the memory referenced by
+.Fa ptr
+to be made available for future allocations.
 .Sh TUNING
 Once, when the first call is made to one of these memory allocation
 routines, various flags will be set or reset, which affects the
@@ -646,11 +758,10 @@ LsR
 ^^R
 ^^R
 LsR
-^^R
-^^R
 ^^R.
 Category;Subcategory;Size
-Small;Tiny;8
+@roff_tiny@Small;Tiny;8
+@roff_no_tiny@Small;Tiny;[disabled]
 ;Quantum-spaced;16
 ;;32
 ;;48
@@ -681,7 +792,7 @@ Allocations are packed tightly together, which can be an issue for
 multi-threaded applications.
 If you need to assure that allocations do not suffer from cacheline sharing,
 round your allocation requests up to the nearest multiple of the cacheline
-size.
+size, or specify cacheline alignment when allocating.
 .Sh MALLCTL NAMESPACE
 The following names are defined in the namespace accessible via the
 .Fn @jemalloc_prefix@mallctl*
@@ -1412,6 +1523,7 @@ is likely to result in a crash or deadlock.
 All messages are prefixed by
 .Dq <jemalloc>: .
 .Sh RETURN VALUES
+.Ss Standard API
 The
 .Fn @jemalloc_prefix@malloc
 and
@@ -1460,7 +1572,7 @@ when an error occurs.
 The
 .Fn @jemalloc_prefix@free
 function returns no value.
-.Pp
+.Ss Non-standard API
 The
 .Fn @jemalloc_prefix@malloc_usable_size
 function returns the usable size of the allocation pointed to by
@@ -1502,6 +1614,47 @@ An interface with side effects failed in some way not directly related to
 .Fn @jemalloc_prefix@mallctl*
 read/write processing.
 .El
+.Ss Experimental API
+The
+.Fn @jemalloc_prefix@allocm ,
+.Fn @jemalloc_prefix@rallocm ,
+.Fn @jemalloc_prefix@sallocm ,
+and
+.Fn @jemalloc_prefix@dallocm
+functions return
+.Dv ALLOCM_SUCCESS
+on success; otherwise they return an error value.
+The
+.Fn @jemalloc_prefix@allocm
+and
+.Fn @jemalloc_prefix@rallocm
+functions will fail if:
+.Bl -tag -width ".Dv ALLOCM_ERR_OOM"
+.It ALLOCM_ERR_OOM
+Out of memory.
+Insufficient contiguous memory was available to service the allocation request.
+The
+.Fn @jemalloc_prefix@allocm
+function additionally sets
+.Fa *ptr
+to
+.Dv NULL ,
+whereas the
+.Fn @jemalloc_prefix@rallocm
+function leaves
+.Fa *ptr
+unmodified.
+.El
+.Pp
+The
+.Fn @jemalloc_prefix@rallocm
+function will also fail if:
+.Bl -tag -width ".Dv ALLOCM_ERR_NOT_MOVED"
+.It ALLOCM_ERR_NOT_MOVED
+.Dv ALLOCM_NO_MOVE
+was specified, but the reallocation request could not be serviced without
+moving the object.
+.El
 .Sh ENVIRONMENT
 The following environment variables affect the execution of the allocation
 functions:
diff --git a/jemalloc/include/jemalloc/internal/arena.h b/jemalloc/include/jemalloc/internal/arena.h
index c1955f19..73ebb00a 100644
--- a/jemalloc/include/jemalloc/internal/arena.h
+++ b/jemalloc/include/jemalloc/internal/arena.h
@@ -432,8 +432,8 @@ void	arena_prof_accum(arena_t *arena, uint64_t accumbytes);
 void	*arena_malloc_small(arena_t *arena, size_t size, bool zero);
 void	*arena_malloc_large(arena_t *arena, size_t size, bool zero);
 void	*arena_malloc(size_t size, bool zero);
-void	*arena_palloc(arena_t *arena, size_t alignment, size_t size,
-    size_t alloc_size);
+void	*arena_palloc(arena_t *arena, size_t size, size_t alloc_size,
+    size_t alignment, bool zero);
 size_t	arena_salloc(const void *ptr);
 #ifdef JEMALLOC_PROF
 void	arena_prof_promoted(const void *ptr, size_t size);
@@ -449,7 +449,10 @@ void	arena_stats_merge(arena_t *arena, size_t *nactive, size_t *ndirty,
     arena_stats_t *astats, malloc_bin_stats_t *bstats,
     malloc_large_stats_t *lstats);
 #endif
-void	*arena_ralloc(void *ptr, size_t size, size_t oldsize);
+void	*arena_ralloc_no_move(void *ptr, size_t oldsize, size_t size,
+    size_t extra, bool zero);
+void	*arena_ralloc(void *ptr, size_t oldsize, size_t size, size_t extra,
+    size_t alignment, bool zero);
 bool	arena_new(arena_t *arena, unsigned ind);
 bool	arena_boot(void);
 
diff --git a/jemalloc/include/jemalloc/internal/huge.h b/jemalloc/include/jemalloc/internal/huge.h
index 0c0582f2..bf231274 100644
--- a/jemalloc/include/jemalloc/internal/huge.h
+++ b/jemalloc/include/jemalloc/internal/huge.h
@@ -20,8 +20,11 @@ extern size_t		huge_allocated;
 extern malloc_mutex_t	huge_mtx;
 
 void	*huge_malloc(size_t size, bool zero);
-void	*huge_palloc(size_t alignment, size_t size);
-void	*huge_ralloc(void *ptr, size_t size, size_t oldsize);
+void	*huge_palloc(size_t size, size_t alignment, bool zero);
+void	*huge_ralloc_no_move(void *ptr, size_t oldsize, size_t size,
+    size_t extra);
+void	*huge_ralloc(void *ptr, size_t oldsize, size_t size, size_t extra,
+    size_t alignment, bool zero);
 void	huge_dalloc(void *ptr);
 size_t	huge_salloc(const void *ptr);
 #ifdef JEMALLOC_PROF
diff --git a/jemalloc/include/jemalloc/internal/jemalloc_internal.h.in b/jemalloc/include/jemalloc/internal/jemalloc_internal.h.in
index a8d27fa7..04bc56fa 100644
--- a/jemalloc/include/jemalloc/internal/jemalloc_internal.h.in
+++ b/jemalloc/include/jemalloc/internal/jemalloc_internal.h.in
@@ -84,6 +84,8 @@ extern void	(*JEMALLOC_P(malloc_message))(void *wcbopaque, const char *s);
 /******************************************************************************/
 #define JEMALLOC_H_TYPES
 
+#define	ALLOCM_LG_ALIGN_MASK	((int)0x3f)
+
 #define	ZU(z)	((size_t)z)
 
 #ifndef __DECONST
@@ -391,12 +393,13 @@ choose_arena(void)
 #ifndef JEMALLOC_ENABLE_INLINE
 void	*imalloc(size_t size);
 void	*icalloc(size_t size);
-void	*ipalloc(size_t alignment, size_t size);
+void	*ipalloc(size_t size, size_t alignment, bool zero);
 size_t	isalloc(const void *ptr);
 #  ifdef JEMALLOC_IVSALLOC
 size_t	ivsalloc(const void *ptr);
 #  endif
-void	*iralloc(void *ptr, size_t size);
+void	*iralloc(void *ptr, size_t size, size_t extra, size_t alignment,
+    bool zero, bool no_move);
 void	idalloc(void *ptr);
 #endif
 
@@ -424,7 +427,7 @@ icalloc(size_t size)
 }
 
 JEMALLOC_INLINE void *
-ipalloc(size_t alignment, size_t size)
+ipalloc(size_t size, size_t alignment, bool zero)
 {
 	void *ret;
 	size_t ceil_size;
@@ -459,7 +462,7 @@ ipalloc(size_t alignment, size_t size)
 
 	if (ceil_size <= PAGE_SIZE || (alignment <= PAGE_SIZE
 	    && ceil_size <= arena_maxclass))
-		ret = arena_malloc(ceil_size, false);
+		ret = arena_malloc(ceil_size, zero);
 	else {
 		size_t run_size;
 
@@ -506,12 +509,12 @@ ipalloc(size_t alignment, size_t size)
 		}
 
 		if (run_size <= arena_maxclass) {
-			ret = arena_palloc(choose_arena(), alignment, ceil_size,
-			    run_size);
+			ret = arena_palloc(choose_arena(), ceil_size, run_size,
+			    alignment, zero);
 		} else if (alignment <= chunksize)
-			ret = huge_malloc(ceil_size, false);
+			ret = huge_malloc(ceil_size, zero);
 		else
-			ret = huge_palloc(alignment, ceil_size);
+			ret = huge_palloc(ceil_size, alignment, zero);
 	}
 
 	assert(((uintptr_t)ret & (alignment - 1)) == 0);
@@ -556,8 +559,10 @@ ivsalloc(const void *ptr)
 #endif
 
 JEMALLOC_INLINE void *
-iralloc(void *ptr, size_t size)
+iralloc(void *ptr, size_t size, size_t extra, size_t alignment, bool zero,
+    bool no_move)
 {
+	void *ret;
 	size_t oldsize;
 
 	assert(ptr != NULL);
@@ -565,10 +570,53 @@ iralloc(void *ptr, size_t size)
 
 	oldsize = isalloc(ptr);
 
-	if (size <= arena_maxclass)
-		return (arena_ralloc(ptr, size, oldsize));
-	else
-		return (huge_ralloc(ptr, size, oldsize));
+	if (alignment != 0 && ((uintptr_t)ptr & ((uintptr_t)alignment-1))
+	    != 0) {
+		size_t copysize;
+
+		/*
+		 * Existing object alignment is inadquate; allocate new space
+		 * and copy.
+		 */
+		if (no_move)
+			return (NULL);
+		ret = ipalloc(size + extra, alignment, zero);
+		if (ret == NULL) {
+			if (extra == 0)
+				return (NULL);
+			/* Try again, without extra this time. */
+			ret = ipalloc(size, alignment, zero);
+			if (ret == NULL)
+				return (NULL);
+		}
+		/*
+		 * Copy at most size bytes (not size+extra), since the caller
+		 * has no expectation that the extra bytes will be reliably
+		 * preserved.
+		 */
+		copysize = (size < oldsize) ? size : oldsize;
+		memcpy(ret, ptr, copysize);
+		idalloc(ptr);
+		return (ret);
+	}
+
+	if (no_move) {
+		if (size <= arena_maxclass) {
+			return (arena_ralloc_no_move(ptr, oldsize, size,
+			    extra, zero));
+		} else {
+			return (huge_ralloc_no_move(ptr, oldsize, size,
+			    extra));
+		}
+	} else {
+		if (size + extra <= arena_maxclass) {
+			return (arena_ralloc(ptr, oldsize, size, extra,
+			    alignment, zero));
+		} else {
+			return (huge_ralloc(ptr, oldsize, size, extra,
+			    alignment, zero));
+		}
+	}
 }
 
 JEMALLOC_INLINE void
diff --git a/jemalloc/include/jemalloc/jemalloc.h.in b/jemalloc/include/jemalloc/jemalloc.h.in
index 8ef81836..c28fb6d3 100644
--- a/jemalloc/include/jemalloc/jemalloc.h.in
+++ b/jemalloc/include/jemalloc/jemalloc.h.in
@@ -4,6 +4,8 @@
 extern "C" {
 #endif
 
+#include <strings.h>
+
 #define	JEMALLOC_VERSION "@jemalloc_version@"
 #define	JEMALLOC_VERSION_MAJOR @jemalloc_version_major@
 #define	JEMALLOC_VERSION_MINOR @jemalloc_version_minor@
@@ -16,6 +18,19 @@ extern "C" {
 #  define JEMALLOC_P(s) s
 #endif
 
+#define	ALLOCM_LG_ALIGN	((int)0x3f)
+#if LG_SIZEOF_PTR == 2
+#define	ALLOCM_ALIGN(a)	(ffs(a)-1)
+#else
+#define	ALLOCM_ALIGN(a)	((a < (size_t)MAX_INT) ? ffs(a)-1 : ffs(a>>32)+31)
+#endif
+#define	ALLOCM_ZERO	((int)0x40)
+#define	ALLOCM_NO_MOVE	((int)0x80)
+
+#define	ALLOCM_SUCCESS		0
+#define	ALLOCM_ERR_OOM		1
+#define	ALLOCM_ERR_NOT_MOVED	2
+
 extern const char	*JEMALLOC_P(malloc_options);
 extern void		(*JEMALLOC_P(malloc_message))(void *, const char *);
 
@@ -36,6 +51,12 @@ int	JEMALLOC_P(mallctlnametomib)(const char *name, size_t *mibp,
 int	JEMALLOC_P(mallctlbymib)(const size_t *mib, size_t miblen, void *oldp,
     size_t *oldlenp, void *newp, size_t newlen);
 
+int	JEMALLOC_P(allocm)(void **ptr, size_t *rsize, size_t size, int flags);
+int	JEMALLOC_P(rallocm)(void **ptr, size_t *rsize, size_t size,
+    size_t extra, int flags);
+int	JEMALLOC_P(sallocm)(const void *ptr, size_t *rsize, int flags);
+int	JEMALLOC_P(dallocm)(void *ptr, int flags);
+
 #ifdef __cplusplus
 };
 #endif
diff --git a/jemalloc/src/arena.c b/jemalloc/src/arena.c
index db3d4010..0c2f4a35 100644
--- a/jemalloc/src/arena.c
+++ b/jemalloc/src/arena.c
@@ -177,10 +177,11 @@ static size_t	arena_bin_run_size_calc(arena_bin_t *bin, size_t min_run_size);
 static void	arena_dalloc_bin_run(arena_t *arena, arena_chunk_t *chunk,
     arena_run_t *run, arena_bin_t *bin);
 static void	arena_ralloc_large_shrink(arena_t *arena, arena_chunk_t *chunk,
-    void *ptr, size_t size, size_t oldsize);
+    void *ptr, size_t oldsize, size_t size);
 static bool	arena_ralloc_large_grow(arena_t *arena, arena_chunk_t *chunk,
-    void *ptr, size_t size, size_t oldsize);
-static bool	arena_ralloc_large(void *ptr, size_t size, size_t oldsize);
+    void *ptr, size_t oldsize, size_t size, size_t extra, bool zero);
+static bool	arena_ralloc_large(void *ptr, size_t oldsize, size_t size,
+    size_t extra, bool zero);
 static bool	small_size2bin_init(void);
 #ifdef JEMALLOC_DEBUG
 static void	small_size2bin_validate(void);
@@ -1438,7 +1439,8 @@ arena_malloc(size_t size, bool zero)
 
 /* Only handles large allocations that require more than page alignment. */
 void *
-arena_palloc(arena_t *arena, size_t alignment, size_t size, size_t alloc_size)
+arena_palloc(arena_t *arena, size_t size, size_t alloc_size, size_t alignment,
+    bool zero)
 {
 	void *ret;
 	size_t offset;
@@ -1448,7 +1450,7 @@ arena_palloc(arena_t *arena, size_t alignment, size_t size, size_t alloc_size)
 	assert((alignment & PAGE_MASK) == 0);
 
 	malloc_mutex_lock(&arena->lock);
-	ret = (void *)arena_run_alloc(arena, alloc_size, true, false);
+	ret = (void *)arena_run_alloc(arena, alloc_size, true, zero);
 	if (ret == NULL) {
 		malloc_mutex_unlock(&arena->lock);
 		return (NULL);
@@ -1496,10 +1498,12 @@ arena_palloc(arena_t *arena, size_t alignment, size_t size, size_t alloc_size)
 	malloc_mutex_unlock(&arena->lock);
 
 #ifdef JEMALLOC_FILL
-	if (opt_junk)
-		memset(ret, 0xa5, size);
-	else if (opt_zero)
-		memset(ret, 0, size);
+	if (zero == false) {
+		if (opt_junk)
+			memset(ret, 0xa5, size);
+		else if (opt_zero)
+			memset(ret, 0, size);
+	}
 #endif
 	return (ret);
 }
@@ -1944,7 +1948,7 @@ arena_dalloc_large(arena_t *arena, arena_chunk_t *chunk, void *ptr)
 
 static void
 arena_ralloc_large_shrink(arena_t *arena, arena_chunk_t *chunk, void *ptr,
-    size_t size, size_t oldsize)
+    size_t oldsize, size_t size)
 {
 
 	assert(size < oldsize);
@@ -1979,27 +1983,29 @@ arena_ralloc_large_shrink(arena_t *arena, arena_chunk_t *chunk, void *ptr,
 
 static bool
 arena_ralloc_large_grow(arena_t *arena, arena_chunk_t *chunk, void *ptr,
-    size_t size, size_t oldsize)
+    size_t oldsize, size_t size, size_t extra, bool zero)
 {
 	size_t pageind = ((uintptr_t)ptr - (uintptr_t)chunk) >> PAGE_SHIFT;
 	size_t npages = oldsize >> PAGE_SHIFT;
+	size_t followsize;
 
 	assert(oldsize == (chunk->map[pageind].bits & ~PAGE_MASK));
 
 	/* Try to extend the run. */
-	assert(size > oldsize);
+	assert(size + extra > oldsize);
 	malloc_mutex_lock(&arena->lock);
 	if (pageind + npages < chunk_npages && (chunk->map[pageind+npages].bits
-	    & CHUNK_MAP_ALLOCATED) == 0 && (chunk->map[pageind+npages].bits &
-	    ~PAGE_MASK) >= size - oldsize) {
+	    & CHUNK_MAP_ALLOCATED) == 0 && (followsize =
+	    chunk->map[pageind+npages].bits & ~PAGE_MASK) >= size - oldsize) {
 		/*
 		 * The next run is available and sufficiently large.  Split the
 		 * following run, then merge the first part with the existing
 		 * allocation.
 		 */
+		size_t splitsize = (oldsize + followsize <= size + extra)
+		    ? followsize : size + extra - oldsize;
 		arena_run_split(arena, (arena_run_t *)((uintptr_t)chunk +
-		    ((pageind+npages) << PAGE_SHIFT)), size - oldsize, true,
-		    false);
+		    ((pageind+npages) << PAGE_SHIFT)), splitsize, true, zero);
 
 		chunk->map[pageind].bits = size | CHUNK_MAP_LARGE |
 		    CHUNK_MAP_ALLOCATED;
@@ -2037,11 +2043,12 @@ arena_ralloc_large_grow(arena_t *arena, arena_chunk_t *chunk, void *ptr,
  * always fail if growing an object, and the following run is already in use.
  */
 static bool
-arena_ralloc_large(void *ptr, size_t size, size_t oldsize)
+arena_ralloc_large(void *ptr, size_t oldsize, size_t size, size_t extra,
+    bool zero)
 {
 	size_t psize;
 
-	psize = PAGE_CEILING(size);
+	psize = PAGE_CEILING(size + extra);
 	if (psize == oldsize) {
 		/* Same size class. */
 #ifdef JEMALLOC_FILL
@@ -2067,14 +2074,15 @@ arena_ralloc_large(void *ptr, size_t size, size_t oldsize)
 				    oldsize - size);
 			}
 #endif
-			arena_ralloc_large_shrink(arena, chunk, ptr, psize,
-			    oldsize);
+			arena_ralloc_large_shrink(arena, chunk, ptr, oldsize,
+			    psize);
 			return (false);
 		} else {
 			bool ret = arena_ralloc_large_grow(arena, chunk, ptr,
-			    psize, oldsize);
+			    oldsize, PAGE_CEILING(size),
+			    psize - PAGE_CEILING(size), zero);
 #ifdef JEMALLOC_FILL
-			if (ret == false && opt_zero) {
+			if (ret == false && zero == false && opt_zero) {
 				memset((void *)((uintptr_t)ptr + oldsize), 0,
 				    size - oldsize);
 			}
@@ -2085,49 +2093,89 @@ arena_ralloc_large(void *ptr, size_t size, size_t oldsize)
 }
 
 void *
-arena_ralloc(void *ptr, size_t size, size_t oldsize)
+arena_ralloc_no_move(void *ptr, size_t oldsize, size_t size, size_t extra,
+    bool zero)
 {
-	void *ret;
-	size_t copysize;
 
-	/* Try to avoid moving the allocation. */
+	/*
+	 * Avoid moving the allocation if the size class can be left the same.
+	 */
 	if (oldsize <= arena_maxclass) {
 		if (oldsize <= small_maxclass) {
-			if (size <= small_maxclass && small_size2bin[size] ==
-			    small_size2bin[oldsize])
-				goto IN_PLACE;
+			assert(choose_arena()->bins[small_size2bin[
+			    oldsize]].reg_size == oldsize);
+			if ((size + extra <= small_maxclass &&
+			    small_size2bin[size + extra] ==
+			    small_size2bin[oldsize]) || (size <= oldsize &&
+			    size + extra >= oldsize)) {
+#ifdef JEMALLOC_FILL
+				if (opt_junk && size < oldsize) {
+					memset((void *)((uintptr_t)ptr + size),
+					    0x5a, oldsize - size);
+				}
+#endif
+				return (ptr);
+			}
 		} else {
 			assert(size <= arena_maxclass);
-			if (size > small_maxclass) {
-				if (arena_ralloc_large(ptr, size, oldsize) ==
-				    false)
+			if (size + extra > small_maxclass) {
+				if (arena_ralloc_large(ptr, oldsize, size,
+				    extra, zero) == false)
 					return (ptr);
 			}
 		}
 	}
 
-	/*
-	 * If we get here, then size and oldsize are different enough that we
-	 * need to move the object.  In that case, fall back to allocating new
-	 * space and copying.
-	 */
-	ret = arena_malloc(size, false);
-	if (ret == NULL)
-		return (NULL);
+	/* Reallocation would require a move. */
+	return (NULL);
+}
 
-	/* Junk/zero-filling were already done by arena_malloc(). */
+void *
+arena_ralloc(void *ptr, size_t oldsize, size_t size, size_t extra,
+    size_t alignment, bool zero)
+{
+	void *ret;
+	size_t copysize;
+
+	/* Try to avoid moving the allocation. */
+	ret = arena_ralloc_no_move(ptr, oldsize, size, extra, zero);
+	if (ret != NULL)
+		return (ret);
+
+
+	/*
+	 * size and oldsize are different enough that we need to move the
+	 * object.  In that case, fall back to allocating new space and
+	 * copying.
+	 */
+	if (alignment != 0)
+		ret = ipalloc(size + extra, alignment, zero);
+	else
+		ret = arena_malloc(size + extra, zero);
+
+	if (ret == NULL) {
+		if (extra == 0)
+			return (NULL);
+		/* Try again, this time without extra. */
+		if (alignment != 0)
+			ret = ipalloc(size, alignment, zero);
+		else
+			ret = arena_malloc(size, zero);
+
+		if (ret == NULL)
+			return (NULL);
+	}
+
+	/* Junk/zero-filling were already done by ipalloc()/arena_malloc(). */
+
+	/*
+	 * Copy at most size bytes (not size+extra), since the caller has no
+	 * expectation that the extra bytes will be reliably preserved.
+	 */
 	copysize = (size < oldsize) ? size : oldsize;
 	memcpy(ret, ptr, copysize);
 	idalloc(ptr);
 	return (ret);
-IN_PLACE:
-#ifdef JEMALLOC_FILL
-	if (opt_junk && size < oldsize)
-		memset((void *)((uintptr_t)ptr + size), 0x5a, oldsize - size);
-	else if (opt_zero && size > oldsize)
-		memset((void *)((uintptr_t)ptr + oldsize), 0, size - oldsize);
-#endif
-	return (ptr);
 }
 
 bool
diff --git a/jemalloc/src/ckh.c b/jemalloc/src/ckh.c
index a0c4162a..95c09678 100644
--- a/jemalloc/src/ckh.c
+++ b/jemalloc/src/ckh.c
@@ -263,13 +263,12 @@ ckh_grow(ckh_t *ckh)
 	lg_curcells = ckh->lg_curbuckets + LG_CKH_BUCKET_CELLS;
 	while (true) {
 		lg_curcells++;
-		tab = (ckhc_t *) ipalloc((ZU(1) << LG_CACHELINE),
-		    sizeof(ckhc_t) << lg_curcells);
+		tab = (ckhc_t *)ipalloc(sizeof(ckhc_t) << lg_curcells,
+		    ZU(1) << LG_CACHELINE, true);
 		if (tab == NULL) {
 			ret = true;
 			goto RETURN;
 		}
-		memset(tab, 0, sizeof(ckhc_t) << lg_curcells);
 		/* Swap in new table. */
 		ttab = ckh->tab;
 		ckh->tab = tab;
@@ -305,8 +304,8 @@ ckh_shrink(ckh_t *ckh)
 	 */
 	lg_prevbuckets = ckh->lg_curbuckets;
 	lg_curcells = ckh->lg_curbuckets + LG_CKH_BUCKET_CELLS - 1;
-	tab = (ckhc_t *)ipalloc((ZU(1) << LG_CACHELINE),
-	    sizeof(ckhc_t) << lg_curcells);
+	tab = (ckhc_t *)ipalloc(sizeof(ckhc_t) << lg_curcells,
+	    ZU(1) << LG_CACHELINE, true);
 	if (tab == NULL) {
 		/*
 		 * An OOM error isn't worth propagating, since it doesn't
@@ -314,7 +313,6 @@ ckh_shrink(ckh_t *ckh)
 		 */
 		return;
 	}
-	memset(tab, 0, sizeof(ckhc_t) << lg_curcells);
 	/* Swap in new table. */
 	ttab = ckh->tab;
 	ckh->tab = tab;
@@ -377,13 +375,12 @@ ckh_new(ckh_t *ckh, size_t minitems, ckh_hash_t *hash, ckh_keycomp_t *keycomp)
 	ckh->hash = hash;
 	ckh->keycomp = keycomp;
 
-	ckh->tab = (ckhc_t *)ipalloc((ZU(1) << LG_CACHELINE),
-	    sizeof(ckhc_t) << lg_mincells);
+	ckh->tab = (ckhc_t *)ipalloc(sizeof(ckhc_t) << lg_mincells,
+	    (ZU(1) << LG_CACHELINE), true);
 	if (ckh->tab == NULL) {
 		ret = true;
 		goto RETURN;
 	}
-	memset(ckh->tab, 0, sizeof(ckhc_t) << lg_mincells);
 
 #ifdef JEMALLOC_DEBUG
 	ckh->magic = CKH_MAGIG;
diff --git a/jemalloc/src/huge.c b/jemalloc/src/huge.c
index be35d16f..a0351975 100644
--- a/jemalloc/src/huge.c
+++ b/jemalloc/src/huge.c
@@ -69,12 +69,11 @@ huge_malloc(size_t size, bool zero)
 
 /* Only handles large allocations that require more than chunk alignment. */
 void *
-huge_palloc(size_t alignment, size_t size)
+huge_palloc(size_t size, size_t alignment, bool zero)
 {
 	void *ret;
 	size_t alloc_size, chunk_size, offset;
 	extent_node_t *node;
-	bool zero;
 
 	/*
 	 * This allocation requires alignment that is even larger than chunk
@@ -98,7 +97,6 @@ huge_palloc(size_t alignment, size_t size)
 	if (node == NULL)
 		return (NULL);
 
-	zero = false;
 	ret = chunk_alloc(alloc_size, false, &zero);
 	if (ret == NULL) {
 		base_node_dealloc(node);
@@ -142,45 +140,80 @@ huge_palloc(size_t alignment, size_t size)
 	malloc_mutex_unlock(&huge_mtx);
 
 #ifdef JEMALLOC_FILL
-	if (opt_junk)
-		memset(ret, 0xa5, chunk_size);
-	else if (opt_zero)
-		memset(ret, 0, chunk_size);
+	if (zero == false) {
+		if (opt_junk)
+			memset(ret, 0xa5, chunk_size);
+		else if (opt_zero)
+			memset(ret, 0, chunk_size);
+	}
 #endif
 
 	return (ret);
 }
 
 void *
-huge_ralloc(void *ptr, size_t size, size_t oldsize)
+huge_ralloc_no_move(void *ptr, size_t oldsize, size_t size, size_t extra)
 {
-	void *ret;
-	size_t copysize;
 
-	/* Avoid moving the allocation if the size class would not change. */
-	if (oldsize > arena_maxclass &&
-	    CHUNK_CEILING(size) == CHUNK_CEILING(oldsize)) {
+	/*
+	 * Avoid moving the allocation if the size class can be left the same.
+	 */
+	if (oldsize > arena_maxclass
+	    && CHUNK_CEILING(oldsize) >= CHUNK_CEILING(size)
+	    && CHUNK_CEILING(oldsize) <= CHUNK_CEILING(size+extra)) {
+		assert(CHUNK_CEILING(oldsize) == oldsize);
 #ifdef JEMALLOC_FILL
 		if (opt_junk && size < oldsize) {
-			memset((void *)((uintptr_t)ptr + size), 0x5a, oldsize
-			    - size);
-		} else if (opt_zero && size > oldsize) {
-			memset((void *)((uintptr_t)ptr + oldsize), 0, size
-			    - oldsize);
+			memset((void *)((uintptr_t)ptr + size), 0x5a,
+			    oldsize - size);
 		}
 #endif
 		return (ptr);
 	}
 
-	/*
-	 * If we get here, then size and oldsize are different enough that we
-	 * need to use a different size class.  In that case, fall back to
-	 * allocating new space and copying.
-	 */
-	ret = huge_malloc(size, false);
-	if (ret == NULL)
-		return (NULL);
+	/* Reallocation would require a move. */
+	return (NULL);
+}
 
+void *
+huge_ralloc(void *ptr, size_t oldsize, size_t size, size_t extra,
+    size_t alignment, bool zero)
+{
+	void *ret;
+	size_t copysize;
+
+	/* Try to avoid moving the allocation. */
+	ret = huge_ralloc_no_move(ptr, oldsize, size, extra);
+	if (ret != NULL)
+		return (ret);
+
+	/*
+	 * size and oldsize are different enough that we need to use a
+	 * different size class.  In that case, fall back to allocating new
+	 * space and copying.
+	 */
+	if (alignment != 0)
+		ret = huge_palloc(size + extra, alignment, zero);
+	else
+		ret = huge_malloc(size + extra, zero);
+
+	if (ret == NULL) {
+		if (extra == 0)
+			return (NULL);
+		/* Try again, this time without extra. */
+		if (alignment != 0)
+			ret = huge_palloc(size, alignment, zero);
+		else
+			ret = huge_malloc(size, zero);
+
+		if (ret == NULL)
+			return (NULL);
+	}
+
+	/*
+	 * Copy at most size bytes (not size+extra), since the caller has no
+	 * expectation that the extra bytes will be reliably preserved.
+	 */
 	copysize = (size < oldsize) ? size : oldsize;
 	memcpy(ret, ptr, copysize);
 	idalloc(ptr);
diff --git a/jemalloc/src/jemalloc.c b/jemalloc/src/jemalloc.c
index bf4ccc05..be3d7da1 100644
--- a/jemalloc/src/jemalloc.c
+++ b/jemalloc/src/jemalloc.c
@@ -854,18 +854,20 @@ JEMALLOC_P(posix_memalign)(void **memptr, size_t alignment, size_t size)
 			} else {
 				if (prof_promote && (uintptr_t)cnt !=
 				    (uintptr_t)1U && size <= small_maxclass) {
-					result = ipalloc(alignment,
-					    small_maxclass+1);
+					result = ipalloc(small_maxclass+1,
+					    alignment, false);
 					if (result != NULL) {
 						arena_prof_promoted(result,
 						    size);
 					}
-				} else
-					result = ipalloc(alignment, size);
+				} else {
+					result = ipalloc(size, alignment,
+					    false);
+				}
 			}
 		} else
 #endif
-			result = ipalloc(alignment, size);
+			result = ipalloc(size, alignment, false);
 	}
 
 	if (result == NULL) {
@@ -1023,14 +1025,15 @@ JEMALLOC_P(realloc)(void *ptr, size_t size)
 			}
 			if (prof_promote && (uintptr_t)cnt != (uintptr_t)1U &&
 			    size <= small_maxclass) {
-				ret = iralloc(ptr, small_maxclass+1);
+				ret = iralloc(ptr, small_maxclass+1, 0, 0,
+				    false, false);
 				if (ret != NULL)
 					arena_prof_promoted(ret, size);
 			} else
-				ret = iralloc(ptr, size);
+				ret = iralloc(ptr, size, 0, 0, false, false);
 		} else
 #endif
-			ret = iralloc(ptr, size);
+			ret = iralloc(ptr, size, 0, 0, false, false);
 
 #ifdef JEMALLOC_PROF
 OOM:
@@ -1133,6 +1136,8 @@ JEMALLOC_P(malloc_usable_size)(const void *ptr)
 {
 	size_t ret;
 
+	assert(malloc_initialized || malloc_initializer == pthread_self());
+
 #ifdef JEMALLOC_IVSALLOC
 	ret = ivsalloc(ptr);
 #else
@@ -1204,6 +1209,184 @@ JEMALLOC_P(mallctlbymib)(const size_t *mib, size_t miblen, void *oldp,
 	return (ctl_bymib(mib, miblen, oldp, oldlenp, newp, newlen));
 }
 
+JEMALLOC_INLINE void *
+iallocm(size_t size, size_t alignment, bool zero)
+{
+
+	if (alignment != 0)
+		return (ipalloc(size, alignment, zero));
+	else if (zero)
+		return (icalloc(size));
+	else
+		return (imalloc(size));
+}
+
+JEMALLOC_ATTR(visibility("default"))
+int
+JEMALLOC_P(allocm)(void **ptr, size_t *rsize, size_t size, int flags)
+{
+	void *p;
+	size_t alignment = (ZU(1) << (flags & ALLOCM_LG_ALIGN_MASK)
+	    & (SIZE_T_MAX-1));
+	bool zero = flags & ALLOCM_ZERO;
+#ifdef JEMALLOC_PROF
+	prof_thr_cnt_t *cnt;
+#endif
+
+	assert(ptr != NULL);
+	assert(size != 0);
+
+	if (malloc_init())
+		goto OOM;
+
+#ifdef JEMALLOC_PROF
+	if (opt_prof) {
+		if ((cnt = prof_alloc_prep(size)) == NULL)
+			goto OOM;
+		if (prof_promote && (uintptr_t)cnt != (uintptr_t)1U && size <=
+		    small_maxclass) {
+			p = iallocm(small_maxclass+1, alignment, zero);
+			if (p == NULL)
+				goto OOM;
+			arena_prof_promoted(p, size);
+		} else {
+			p = iallocm(size, alignment, zero);
+			if (p == NULL)
+				goto OOM;
+		}
+	} else
+#endif
+	{
+		p = iallocm(size, alignment, zero);
+		if (p == NULL)
+			goto OOM;
+	}
+
+	*ptr = p;
+	if (rsize != NULL)
+		*rsize = isalloc(p);
+	return (ALLOCM_SUCCESS);
+OOM:
+#ifdef JEMALLOC_XMALLOC
+	if (opt_xmalloc) {
+		malloc_write("<jemalloc>: Error in allocm(): "
+		    "out of memory\n");
+		abort();
+	}
+#endif
+	*ptr = NULL;
+	return (ALLOCM_ERR_OOM);
+}
+
+JEMALLOC_ATTR(visibility("default"))
+int
+JEMALLOC_P(rallocm)(void **ptr, size_t *rsize, size_t size, size_t extra,
+    int flags)
+{
+	void *p, *q;
+	size_t alignment = (ZU(1) << (flags & ALLOCM_LG_ALIGN_MASK)
+	    & (SIZE_T_MAX-1));
+	bool zero = flags & ALLOCM_ZERO;
+	bool no_move = flags & ALLOCM_NO_MOVE;
+#ifdef JEMALLOC_PROF
+	size_t old_size;
+	prof_thr_cnt_t *cnt;
+	prof_ctx_t *old_ctx;
+#endif
+
+	assert(ptr != NULL);
+	assert(*ptr != NULL);
+	assert(size != 0);
+	assert(SIZE_T_MAX - size >= extra);
+	assert(malloc_initialized || malloc_initializer == pthread_self());
+
+	p = *ptr;
+#ifdef JEMALLOC_PROF
+	if (opt_prof) {
+		old_size = isalloc(p);
+		old_ctx = prof_ctx_get(p);
+		if ((cnt = prof_alloc_prep(size)) == NULL)
+			goto OOM;
+		if (prof_promote && (uintptr_t)cnt != (uintptr_t)1U && size <=
+		    small_maxclass) {
+			q = iralloc(p, small_maxclass+1, (small_maxclass+1 >=
+			    size+extra) ? 0 : size+extra - (small_maxclass+1),
+			    alignment, zero, no_move);
+			if (q == NULL)
+				goto ERR;
+			arena_prof_promoted(q, size);
+		} else {
+			q = iralloc(p, size, extra, alignment, zero, no_move);
+			if (q == NULL)
+				goto ERR;
+		}
+		prof_realloc(q, cnt, p, old_size, old_ctx);
+	} else
+#endif
+	{
+		q = iralloc(p, size, extra, alignment, zero, no_move);
+		if (q == NULL)
+			goto ERR;
+	}
+
+	*ptr = q;
+	if (rsize != NULL)
+		*rsize = isalloc(q);
+
+	return (ALLOCM_SUCCESS);
+ERR:
+	if (no_move)
+		return (ALLOCM_ERR_NOT_MOVED);
+#ifdef JEMALLOC_PROF
+OOM:
+#endif
+#ifdef JEMALLOC_XMALLOC
+	if (opt_xmalloc) {
+		malloc_write("<jemalloc>: Error in rallocm(): "
+		    "out of memory\n");
+		abort();
+	}
+#endif
+	return (ALLOCM_ERR_OOM);
+}
+
+JEMALLOC_ATTR(visibility("default"))
+int
+JEMALLOC_P(sallocm)(const void *ptr, size_t *rsize, int flags)
+{
+	size_t sz;
+
+	assert(malloc_initialized || malloc_initializer == pthread_self());
+
+#ifdef JEMALLOC_IVSALLOC
+	sz = ivsalloc(ptr);
+#else
+	assert(ptr != NULL);
+	sz = isalloc(ptr);
+#endif
+	assert(rsize != NULL);
+	*rsize = sz;
+
+	return (ALLOCM_SUCCESS);
+}
+
+JEMALLOC_ATTR(visibility("default"))
+int
+JEMALLOC_P(dallocm)(void *ptr, int flags)
+{
+
+	assert(ptr != NULL);
+	assert(malloc_initialized || malloc_initializer == pthread_self());
+
+#ifdef JEMALLOC_PROF
+	if (opt_prof)
+		prof_free(ptr);
+#endif
+	idalloc(ptr);
+
+	return (ALLOCM_SUCCESS);
+}
+
 /*
  * End non-standard functions.
  */
diff --git a/jemalloc/src/prof.c b/jemalloc/src/prof.c
index e70b1325..7d596df2 100644
--- a/jemalloc/src/prof.c
+++ b/jemalloc/src/prof.c
@@ -90,7 +90,7 @@ prof_sample_state_t prof_sample_state_oom;
 	r = (prof_sample_state_t *)pthread_getspecific(			\
 	    prof_sample_state_tsd);					\
 	if (r == NULL) {						\
-		r = ipalloc(CACHELINE, sizeof(prof_sample_state_t));	\
+		r = ipalloc(sizeof(prof_sample_state_t), CACHELINE);	\
 		if (r == NULL) {					\
 			malloc_write("<jemalloc>: Error in heap "	\
 			    "profiler: out of memory; subsequent heap "	\
diff --git a/jemalloc/src/tcache.c b/jemalloc/src/tcache.c
index 86343835..550b9c42 100644
--- a/jemalloc/src/tcache.c
+++ b/jemalloc/src/tcache.c
@@ -209,7 +209,9 @@ tcache_create(arena_t *arena)
 	 * Round up to the nearest multiple of the cacheline size, in order to
 	 * avoid the possibility of false cacheline sharing.
 	 *
-	 * That this works relies on the same logic as in ipalloc().
+	 * That this works relies on the same logic as in ipalloc(), but we
+	 * cannot directly call ipalloc() here due to tcache bootstrapping
+	 * issues.
 	 */
 	size = (size + CACHELINE_MASK) & (-CACHELINE);
 
diff --git a/jemalloc/test/allocm.c b/jemalloc/test/allocm.c
new file mode 100644
index 00000000..4367cb89
--- /dev/null
+++ b/jemalloc/test/allocm.c
@@ -0,0 +1,133 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+
+#define	JEMALLOC_MANGLE
+#include "jemalloc/jemalloc.h"
+
+#define CHUNK 0x400000
+/* #define MAXALIGN ((size_t)0x80000000000LLU) */
+#define MAXALIGN ((size_t)0x2000000LLU)
+#define NITER 4
+
+int
+main(void)
+{
+	int r;
+	void *p;
+	size_t sz, alignment, total, tsz;
+	unsigned i;
+	void *ps[NITER];
+
+	fprintf(stderr, "Test begin\n");
+
+	sz = 0;
+	r = JEMALLOC_P(allocm)(&p, &sz, 42, 0);
+	if (r != ALLOCM_SUCCESS) {
+		fprintf(stderr, "Unexpected allocm() error\n");
+		abort();
+	}
+	if (sz < 42)
+		fprintf(stderr, "Real size smaller than expected\n");
+	if (JEMALLOC_P(dallocm)(p, 0) != ALLOCM_SUCCESS)
+		fprintf(stderr, "Unexpected dallocm() error\n");
+
+	r = JEMALLOC_P(allocm)(&p, NULL, 42, 0);
+	if (r != ALLOCM_SUCCESS) {
+		fprintf(stderr, "Unexpected allocm() error\n");
+		abort();
+	}
+	if (JEMALLOC_P(dallocm)(p, 0) != ALLOCM_SUCCESS)
+		fprintf(stderr, "Unexpected dallocm() error\n");
+
+	r = JEMALLOC_P(allocm)(&p, NULL, 42, ALLOCM_ZERO);
+	if (r != ALLOCM_SUCCESS) {
+		fprintf(stderr, "Unexpected allocm() error\n");
+		abort();
+	}
+	if (JEMALLOC_P(dallocm)(p, 0) != ALLOCM_SUCCESS)
+		fprintf(stderr, "Unexpected dallocm() error\n");
+
+#if LG_SIZEOF_PTR == 3
+	alignment = 0x8000000000000000LLU;
+	sz        = 0x8000000000000000LLU;
+#else
+	alignment = 0x80000000LU;
+	sz        = 0x80000000LU;
+#endif
+	r = JEMALLOC_P(allocm)(&p, NULL, sz, ALLOCM_ALIGN(alignment));
+	if (r == ALLOCM_SUCCESS) {
+		fprintf(stderr,
+		    "Expected error for allocm(&p, %zu, 0x%x)\n",
+		    sz, ALLOCM_ALIGN(alignment));
+	}
+
+#if LG_SIZEOF_PTR == 3
+	alignment = 0x4000000000000000LLU;
+	sz        = 0x8400000000000001LLU;
+#else
+	alignment = 0x40000000LU;
+	sz        = 0x84000001LU;
+#endif
+	r = JEMALLOC_P(allocm)(&p, NULL, sz, ALLOCM_ALIGN(alignment));
+	if (r == ALLOCM_SUCCESS) {
+		fprintf(stderr,
+		    "Expected error for allocm(&p, %zu, 0x%x)\n",
+		    sz, ALLOCM_ALIGN(alignment));
+	}
+
+	alignment = 0x10LLU;
+#if LG_SIZEOF_PTR == 3
+	sz   = 0xfffffffffffffff0LLU;
+#else
+	sz   = 0xfffffff0LU;
+#endif
+	r = JEMALLOC_P(allocm)(&p, NULL, sz, ALLOCM_ALIGN(alignment));
+	if (r == ALLOCM_SUCCESS) {
+		fprintf(stderr,
+		    "Expected error for allocm(&p, %zu, 0x%x)\n",
+		    sz, ALLOCM_ALIGN(alignment));
+	}
+
+	for (i = 0; i < NITER; i++)
+		ps[i] = NULL;
+
+	for (alignment = 8;
+	    alignment <= MAXALIGN;
+	    alignment <<= 1) {
+		total = 0;
+		fprintf(stderr, "Alignment: %zu\n", alignment);
+		for (sz = 1;
+		    sz < 3 * alignment && sz < (1U << 31);
+		    sz += (alignment >> (LG_SIZEOF_PTR-1)) - 1) {
+			for (i = 0; i < NITER; i++) {
+				r = JEMALLOC_P(allocm)(&ps[i], NULL, sz,
+				    ALLOCM_ALIGN(alignment) | ALLOCM_ZERO);
+				if (r != ALLOCM_SUCCESS) {
+					fprintf(stderr,
+					    "Error for size %zu (0x%zx): %d\n",
+					    sz, sz, r);
+					exit(1);
+				}
+				if ((uintptr_t)p & (alignment-1)) {
+					fprintf(stderr,
+					    "%p inadequately aligned for"
+					    " alignment: %zu\n", p, alignment);
+				}
+				JEMALLOC_P(sallocm)(ps[i], &tsz, 0);
+				total += tsz;
+				if (total >= (MAXALIGN << 1))
+					break;
+			}
+			for (i = 0; i < NITER; i++) {
+				if (ps[i] != NULL) {
+					JEMALLOC_P(dallocm)(ps[i], 0);
+					ps[i] = NULL;
+				}
+			}
+		}
+	}
+
+	fprintf(stderr, "Test end\n");
+	return (0);
+}
diff --git a/jemalloc/test/allocm.exp b/jemalloc/test/allocm.exp
new file mode 100644
index 00000000..b5061c72
--- /dev/null
+++ b/jemalloc/test/allocm.exp
@@ -0,0 +1,25 @@
+Test begin
+Alignment: 8
+Alignment: 16
+Alignment: 32
+Alignment: 64
+Alignment: 128
+Alignment: 256
+Alignment: 512
+Alignment: 1024
+Alignment: 2048
+Alignment: 4096
+Alignment: 8192
+Alignment: 16384
+Alignment: 32768
+Alignment: 65536
+Alignment: 131072
+Alignment: 262144
+Alignment: 524288
+Alignment: 1048576
+Alignment: 2097152
+Alignment: 4194304
+Alignment: 8388608
+Alignment: 16777216
+Alignment: 33554432
+Test end
diff --git a/jemalloc/test/posix_memalign.c b/jemalloc/test/posix_memalign.c
index cd3cadc9..c5651d7c 100644
--- a/jemalloc/test/posix_memalign.c
+++ b/jemalloc/test/posix_memalign.c
@@ -7,7 +7,7 @@
 #define	JEMALLOC_MANGLE
 #include "jemalloc/jemalloc.h"
 
-#define CHUNK 0x100000
+#define CHUNK 0x400000
 /* #define MAXALIGN ((size_t)0x80000000000LLU) */
 #define MAXALIGN ((size_t)0x2000000LLU)
 #define NITER 4
@@ -117,6 +117,5 @@ main(void)
 	}
 
 	fprintf(stderr, "Test end\n");
-
-	return 0;
+	return (0);
 }
diff --git a/jemalloc/test/rallocm.c b/jemalloc/test/rallocm.c
new file mode 100644
index 00000000..b52bdb20
--- /dev/null
+++ b/jemalloc/test/rallocm.c
@@ -0,0 +1,117 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#define	JEMALLOC_MANGLE
+#include "jemalloc/jemalloc.h"
+
+int
+main(void)
+{
+	void *p, *q;
+	size_t sz, tsz;
+	int r;
+
+	fprintf(stderr, "Test begin\n");
+
+	r = allocm(&p, &sz, 42, 0);
+	if (r != ALLOCM_SUCCESS) {
+		fprintf(stderr, "Unexpected allocm() error\n");
+		abort();
+	}
+
+	q = p;
+	r = rallocm(&q, &tsz, sz, 0, ALLOCM_NO_MOVE);
+	if (r != ALLOCM_SUCCESS)
+		fprintf(stderr, "Unexpected rallocm() error\n");
+	if (q != p)
+		fprintf(stderr, "Unexpected object move\n");
+	if (tsz != sz) {
+		fprintf(stderr, "Unexpected size change: %zu --> %zu\n",
+		    sz, tsz);
+	}
+
+	q = p;
+	r = rallocm(&q, &tsz, sz, 5, ALLOCM_NO_MOVE);
+	if (r != ALLOCM_SUCCESS)
+		fprintf(stderr, "Unexpected rallocm() error\n");
+	if (q != p)
+		fprintf(stderr, "Unexpected object move\n");
+	if (tsz != sz) {
+		fprintf(stderr, "Unexpected size change: %zu --> %zu\n",
+		    sz, tsz);
+	}
+
+	q = p;
+	r = rallocm(&q, &tsz, sz + 5, 0, ALLOCM_NO_MOVE);
+	if (r != ALLOCM_ERR_NOT_MOVED)
+		fprintf(stderr, "Unexpected rallocm() result\n");
+	if (q != p)
+		fprintf(stderr, "Unexpected object move\n");
+	if (tsz != sz) {
+		fprintf(stderr, "Unexpected size change: %zu --> %zu\n",
+		    sz, tsz);
+	}
+
+	q = p;
+	r = rallocm(&q, &tsz, sz + 5, 0, 0);
+	if (r != ALLOCM_SUCCESS)
+		fprintf(stderr, "Unexpected rallocm() error\n");
+	if (q == p)
+		fprintf(stderr, "Expected object move\n");
+	if (tsz == sz) {
+		fprintf(stderr, "Expected size change: %zu --> %zu\n",
+		    sz, tsz);
+	}
+	p = q;
+	sz = tsz;
+
+	r = rallocm(&q, &tsz, 8192, 0, 0);
+	if (r != ALLOCM_SUCCESS)
+		fprintf(stderr, "Unexpected rallocm() error\n");
+	if (q == p)
+		fprintf(stderr, "Expected object move\n");
+	if (tsz == sz) {
+		fprintf(stderr, "Expected size change: %zu --> %zu\n",
+		    sz, tsz);
+	}
+	p = q;
+	sz = tsz;
+
+	r = rallocm(&q, &tsz, 16384, 0, 0);
+	if (r != ALLOCM_SUCCESS)
+		fprintf(stderr, "Unexpected rallocm() error\n");
+	if (tsz == sz) {
+		fprintf(stderr, "Expected size change: %zu --> %zu\n",
+		    sz, tsz);
+	}
+	p = q;
+	sz = tsz;
+
+	r = rallocm(&q, &tsz, 8192, 0, ALLOCM_NO_MOVE);
+	if (r != ALLOCM_SUCCESS)
+		fprintf(stderr, "Unexpected rallocm() error\n");
+	if (q != p)
+		fprintf(stderr, "Unexpected object move\n");
+	if (tsz == sz) {
+		fprintf(stderr, "Expected size change: %zu --> %zu\n",
+		    sz, tsz);
+	}
+	sz = tsz;
+
+	r = rallocm(&q, &tsz, 16384, 0, ALLOCM_NO_MOVE);
+	if (r != ALLOCM_SUCCESS)
+		fprintf(stderr, "Unexpected rallocm() error\n");
+	if (q != p)
+		fprintf(stderr, "Unexpected object move\n");
+	if (tsz == sz) {
+		fprintf(stderr, "Expected size change: %zu --> %zu\n",
+		    sz, tsz);
+	}
+	sz = tsz;
+
+	dallocm(p, 0);
+
+	fprintf(stderr, "Test end\n");
+	return (0);
+}
diff --git a/jemalloc/test/rallocm.exp b/jemalloc/test/rallocm.exp
new file mode 100644
index 00000000..369a88dd
--- /dev/null
+++ b/jemalloc/test/rallocm.exp
@@ -0,0 +1,2 @@
+Test begin
+Test end