Merge branch 'sverker/system_info-erts_mmap/OTP-13560'

8 files changed, 244 insertions, 148 deletions

diff --git a/erts/doc/src/erlang.xml b/erts/doc/src/erlang.xml
index bdaa6caa15..bf30cc7928 100644
--- a/erts/doc/src/erlang.xml
+++ b/erts/doc/src/erlang.xml
@@ -6841,11 +6841,7 @@ ok
 	       As from <c>ERTS</c> 5.6.1, the return value is a list
 	       of <c>{instance, InstanceNo, InstanceInfo}</c> tuples,
 	       where <c>InstanceInfo</c> contains information about
-	       a specific instance of the allocator. As from
-               <c>ERTS</c> 5.10.4, the returned list when calling
-	       <c>erlang:system_info({allocator, mseg_alloc})</c> also
-	       includes an <c>{erts_mmap, _}</c> tuple as one element
-	       in the list. If <c><anno>Alloc</anno></c> is not a
+	       a specific instance of the allocator. If <c><anno>Alloc</anno></c> is not a
                recognized allocator, <c>undefined</c> is returned.
                If <c><anno>Alloc</anno></c> is disabled,
               <c>false</c> is returned.</p>
@@ -6857,7 +6853,13 @@ ok
               briefly documented.</p>
             <p>The recognized allocators are listed in
               <seealso marker="erts:erts_alloc">erts_alloc(3)</seealso>.
-              After reading the <c>erts_alloc(3)</c> documentation,
+	      Information about super carriers can be obtained from
+	      <c>ERTS</c> 8.0 with <c>{allocator, erts_mmap}</c> or from
+	      <c>ERTS</c> 5.10.4, the returned list when calling with
+	      <c>{allocator, mseg_alloc}</c> also includes an
+	      <c>{erts_mmap, _}</c> tuple as one element in the list.</p>
+
+            <p>After reading the <c>erts_alloc(3)</c> documentation,
 	      the returned information
               more or less speaks for itself, but it can be worth
               explaining some things. Call counts are presented by two
diff --git a/erts/emulator/beam/erl_alloc.c b/erts/emulator/beam/erl_alloc.c
index 3dc12bac51..c367d4162c 100644
--- a/erts/emulator/beam/erl_alloc.c
+++ b/erts/emulator/beam/erl_alloc.c
@@ -137,6 +137,11 @@ static ErtsAllocatorState_t exec_alloc_state;
 #endif
 static ErtsAllocatorState_t test_alloc_state;
 
+#define ERTS_ALC_INFO_A_ALLOC_UTIL (ERTS_ALC_A_MAX + 1)
+#define ERTS_ALC_INFO_A_MSEG_ALLOC (ERTS_ALC_A_MAX + 2)
+#define ERTS_ALC_INFO_A_ERTS_MMAP  (ERTS_ALC_A_MAX + 3)
+#define ERTS_ALC_INFO_A_MAX        ERTS_ALC_INFO_A_ERTS_MMAP
+
 typedef struct {
     erts_smp_atomic32_t refc;
     int only_sz;
@@ -145,13 +150,9 @@ typedef struct {
     Process *proc;
     Eterm ref;
     Eterm ref_heap[REF_THING_SIZE];
-    int allocs[ERTS_ALC_A_MAX-ERTS_ALC_A_MIN+1+2];
+    int allocs[ERTS_ALC_INFO_A_MAX - ERTS_ALC_A_MIN + 1 + 1];
 } ErtsAllocInfoReq;
 
-#define ERTS_ALC_INFO_A_ALLOC_UTIL (ERTS_ALC_A_MAX + 1)
-#define ERTS_ALC_INFO_A_MSEG_ALLOC (ERTS_ALC_A_MAX + 2)
-#define ERTS_ALC_INFO_A_MAX ERTS_ALC_INFO_A_MSEG_ALLOC
-
 ERTS_SCHED_PREF_QUICK_ALLOC_IMPL(aireq,
                                  ErtsAllocInfoReq,
                                  5,
@@ -2840,10 +2841,18 @@ erts_allocator_info(int to, void *arg)
 	int i;
 	for (i = 0; i <= max; i++) {
 	    erts_print(to, arg, "=allocator:mseg_alloc[%d]\n", i);
-	    erts_mseg_info(i, &to, arg, 0, NULL, NULL);
+	    erts_mseg_info(i, &to, arg, 0, 0, NULL, NULL);
 	}
-	erts_print(to, arg, "=allocator:mseg_alloc.erts_mmap\n");
+	erts_print(to, arg, "=allocator:erts_mmap.default_mmap\n");
 	erts_mmap_info(&erts_dflt_mmapper, &to, arg, NULL, NULL, &emis);
+#if defined(ARCH_64) && defined(ERTS_HAVE_OS_PHYSICAL_MEMORY_RESERVATION)
+        erts_print(to, arg, "=allocator:erts_mmap.literal_mmap\n");
+        erts_mmap_info(&erts_literal_mmapper, &to, arg, NULL, NULL, &emis);
+#endif
+#ifdef ERTS_ALC_A_EXEC
+        erts_print(to, arg, "=allocator:erts_mmap.exec_mmap\n");
+        erts_mmap_info(&erts_exec_mmapper, &to, arg, NULL, NULL, &emis);
+#endif
     }
 #endif
 
@@ -2954,6 +2963,11 @@ erts_allocator_options(void *proc)
     atoms[length] = am_atom_put("alloc_util", 10); 
     terms[length++] = erts_alcu_au_info_options(NULL, NULL, hpp, szp);
 
+#if HAVE_ERTS_MMAP
+    atoms[length] = ERTS_MAKE_AM("erts_mmap");
+    terms[length++] = erts_mmap_info_options(&erts_dflt_mmapper, NULL, NULL,
+                                             NULL, hpp, szp);
+#endif
     {
 	Eterm o[3], v[3];
 	o[0] = am_atom_put("m", 1);
@@ -2990,7 +3004,12 @@ erts_allocator_options(void *proc)
 #if ERTS_HAVE_ERTS_SYS_ALIGNED_ALLOC
     terms[length++] = am_atom_put("sys_aligned_alloc", 17);
 #endif
-
+#if defined(ARCH_64) && defined(ERTS_HAVE_OS_PHYSICAL_MEMORY_RESERVATION)
+    terms[length++] = ERTS_MAKE_AM("literal_mmap");
+#endif
+#ifdef ERTS_ALC_A_EXEC
+    terms[length++] = ERTS_MAKE_AM("exec_mmap");
+#endif
     features = length ? erts_bld_list(hpp, szp, length, terms) : NIL;
 
 #if defined(__GLIBC__)
@@ -3075,7 +3094,15 @@ reply_alloc_info(void *vair)
     Uint sz, *szp;
     ErlOffHeap *ohp = NULL;
     ErtsMessage *mp = NULL;
-    struct erts_mmap_info_struct emis;
+#if HAVE_ERTS_MMAP
+    struct erts_mmap_info_struct mmap_info_dflt;
+# if defined(ARCH_64) && defined(ERTS_HAVE_OS_PHYSICAL_MEMORY_RESERVATION)
+    struct erts_mmap_info_struct mmap_info_literal;
+# endif
+# ifdef ERTS_ALC_A_EXEC
+    struct erts_mmap_info_struct mmap_info_exec;
+# endif
+#endif
     int i;
     Eterm (*info_func)(Allctr_t *,
 		       int,
@@ -3181,26 +3208,53 @@ reply_alloc_info(void *vair)
 					   make_small(0),
 					   ainfo);
 		    break;
+                case ERTS_ALC_INFO_A_ERTS_MMAP:
+                    alloc_atom = erts_bld_atom(hpp, szp, "erts_mmap");
+#if HAVE_ERTS_MMAP
+                    ainfo = (air->only_sz ? NIL :
+                             erts_mmap_info(&erts_dflt_mmapper, NULL, NULL,
+                                            hpp, szp, &mmap_info_dflt));
+                    ainfo = erts_bld_tuple3(hpp, szp,
+                                            alloc_atom,
+                                            erts_bld_atom(hpp,szp,"default_mmap"),
+                                            ainfo);
+#  if defined(ARCH_64) && defined(ERTS_HAVE_OS_PHYSICAL_MEMORY_RESERVATION)
+                    ai_list = erts_bld_cons(hpp, szp,
+                                            ainfo, ai_list);
+                    ainfo = (air->only_sz ? NIL :
+                             erts_mmap_info(&erts_literal_mmapper, NULL, NULL,
+                                            hpp, szp, &mmap_info_literal));
+                    ainfo = erts_bld_tuple3(hpp, szp,
+                                            alloc_atom,
+                                            erts_bld_atom(hpp,szp,"literal_mmap"),
+                                            ainfo);
+#  endif
+#  ifdef ERTS_ALC_A_EXEC
+                    ai_list = erts_bld_cons(hpp, szp,
+                                            ainfo, ai_list);
+                    ainfo = (air->only_sz ? NIL :
+                             erts_mmap_info(&erts_exec_mmapper, NULL, NULL,
+                                            hpp, szp, &mmap_info_exec));
+                    ainfo = erts_bld_tuple3(hpp, szp,
+                                            alloc_atom,
+                                            erts_bld_atom(hpp,szp,"exec_mmap"),
+                                            ainfo);
+#  endif
+#else  /* !HAVE_ERTS_MMAP */
+                    ainfo = erts_bld_tuple2(hpp, szp, alloc_atom,
+                                            am_false);
+#endif
+                    break;
 		case ERTS_ALC_INFO_A_MSEG_ALLOC:
 		    alloc_atom = erts_bld_atom(hpp, szp, "mseg_alloc");
 #if HAVE_ERTS_MSEG
-		    ainfo = (air->only_sz
-			     ? NIL
-			     : erts_mseg_info(0, NULL, NULL, hpp != NULL,
-					      hpp, szp));
+		    ainfo = erts_mseg_info(0, NULL, NULL, hpp != NULL,
+                                           air->only_sz, hpp, szp);
 		    ainfo = erts_bld_tuple3(hpp, szp,
                                             alloc_atom,
                                             make_small(0),
                                             ainfo);
 
-		    ai_list = erts_bld_cons(hpp, szp,
-					    ainfo, ai_list);
-		    ainfo = (air->only_sz ? NIL :
-                             erts_mmap_info(&erts_dflt_mmapper, NULL, NULL, hpp, szp, &emis));
-		    ainfo = erts_bld_tuple3(hpp, szp,
-                                            alloc_atom,
-                                            erts_bld_atom(hpp,szp,"erts_mmap"),
-                                            ainfo);
 #else
 		    ainfo = erts_bld_tuple2(hpp, szp, alloc_atom,
                                             am_false);
@@ -3232,15 +3286,14 @@ reply_alloc_info(void *vair)
 	    }
 	    switch (ai) {
 	    case ERTS_ALC_A_SYSTEM:
-	    case ERTS_ALC_INFO_A_ALLOC_UTIL:
+            case ERTS_ALC_INFO_A_ALLOC_UTIL:
+            case ERTS_ALC_INFO_A_ERTS_MMAP:
 		break;
 	    case ERTS_ALC_INFO_A_MSEG_ALLOC:
 #if HAVE_ERTS_MSEG && defined(ERTS_SMP)
 		alloc_atom = erts_bld_atom(hpp, szp, "mseg_alloc");
-		ainfo = (air->only_sz
-			 ? NIL
-			 : erts_mseg_info(sched_id, NULL, NULL,
-					  hpp != NULL, hpp, szp));
+		ainfo = erts_mseg_info(sched_id, NULL, NULL,
+                                       hpp != NULL, air->only_sz, hpp, szp);
 		ainfo = erts_bld_tuple(hpp, szp, 3,
 				       alloc_atom,
 				       make_small(sched_id),
@@ -3306,7 +3359,7 @@ erts_request_alloc_info(struct process *c_p,
 			int internal)
 {
     ErtsAllocInfoReq *air = aireq_alloc();
-    Eterm req_ai[ERTS_ALC_A_MAX+1+2] = {0};
+    Eterm req_ai[ERTS_ALC_INFO_A_MAX+1] = {0};
     Eterm alist;
     Eterm *hp;
     int airix = 0, ai;
@@ -3342,6 +3395,10 @@ erts_request_alloc_info(struct process *c_p,
 	    ai = ERTS_ALC_INFO_A_MSEG_ALLOC;
 	    goto save_alloc;
 	}
+        if (erts_is_atom_str("erts_mmap", alloc, 0)) {
+            ai = ERTS_ALC_INFO_A_ERTS_MMAP;
+            goto save_alloc;
+        }
 	if (erts_is_atom_str("alloc_util", alloc, 0)) {
 	    ai = ERTS_ALC_INFO_A_ALLOC_UTIL;
 	save_alloc:
diff --git a/erts/emulator/beam/erl_bif_info.c b/erts/emulator/beam/erl_bif_info.c
index 99fe847ba2..85cadafebc 100644
--- a/erts/emulator/beam/erl_bif_info.c
+++ b/erts/emulator/beam/erl_bif_info.c
@@ -3555,7 +3555,7 @@ BIF_RETTYPE erts_debug_get_internal_state_1(BIF_ALIST_1)
 	    BIF_RET(res);
 	}
         else if (ERTS_IS_ATOM_STR("mmap", BIF_ARG_1)) {
-            BIF_RET(erts_mmap_debug_info(&erts_dflt_mmapper, BIF_P));
+            BIF_RET(erts_mmap_debug_info(BIF_P));
         }
 	else if (ERTS_IS_ATOM_STR("unique_monotonic_integer_state", BIF_ARG_1)) {
 	    BIF_RET(erts_debug_get_unique_monotonic_integer_state(BIF_P));
diff --git a/erts/emulator/sys/common/erl_mmap.c b/erts/emulator/sys/common/erl_mmap.c
index a7e710070b..53009a1481 100644
--- a/erts/emulator/sys/common/erl_mmap.c
+++ b/erts/emulator/sys/common/erl_mmap.c
@@ -28,6 +28,8 @@
 #include "erl_mmap.h"
 #include <stddef.h>
 
+#if HAVE_ERTS_MMAP
+
 /* #define ERTS_MMAP_OP_RINGBUF_SZ 100 */
 
 #if defined(DEBUG) || 0
@@ -2099,6 +2101,7 @@ int erts_mmap_in_supercarrier(ErtsMemMapper* mm, void *ptr)
 }
 
 static struct {
+    Eterm options;
     Eterm total;
     Eterm total_sa;
     Eterm total_sua;
@@ -2132,6 +2135,7 @@ static void init_atoms(void)
     erts_mtx_lock(&am.init_mutex);
 
     if (!am.is_initialized) {
+        AM_INIT(options);
         AM_INIT(total);
         AM_INIT(total_sa);
         AM_INIT(total_sua);
@@ -2387,9 +2391,9 @@ Eterm erts_mmap_info(ErtsMemMapper* mm,
     Eterm seg_tags[] = { am.used, am.max, am.allocated, am.reserved, am.used_sa, am.used_sua };
     Eterm group[2];
     Eterm group_tags[] = { am.sizes, am.free_segs };
-    Eterm list[2];
-    Eterm list_tags[2]; /* { am.supercarrier, am.os } */
-    int lix;
+    Eterm list[3];
+    Eterm list_tags[3]; /* { am.options, am.supercarrier, am.os } */
+    int lix = 0;
     Eterm res = THE_NON_VALUE;
 
     if (!hpp) {
@@ -2412,6 +2416,12 @@ Eterm erts_mmap_info(ErtsMemMapper* mm,
         erts_smp_mtx_unlock(&mm->mtx);
     }
 
+    list[lix] = erts_mmap_info_options(mm, "option ", print_to_p, print_to_arg,
+                                       hpp, szp);
+    list_tags[lix] = am.options;
+    lix++;
+
+
     if (print_to_p) {
         int to = *print_to_p;
 	void *arg = print_to_arg;
@@ -2441,7 +2451,6 @@ Eterm erts_mmap_info(ErtsMemMapper* mm,
             init_atoms();
         }
 
-        lix = 0;
         if (mm->supercarrier) {
             group[0] = erts_bld_atom_uword_2tup_list(hpp, szp,
                                                      sizeof(size_tags)/sizeof(Eterm),
@@ -2506,9 +2515,13 @@ Eterm erts_mmap_info_options(ErtsMemMapper* mm,
     return res;
 }
 
+#endif /* HAVE_ERTS_MMAP */
 
-Eterm erts_mmap_debug_info(ErtsMemMapper* mm, Process* p)
+Eterm erts_mmap_debug_info(Process* p)
 {
+#if HAVE_ERTS_MMAP
+    ErtsMemMapper* mm = &erts_dflt_mmapper;
+
     if (mm->supercarrier) {
         ERTS_DECL_AM(sabot);
         ERTS_DECL_AM(satop);
@@ -2546,9 +2559,8 @@ Eterm erts_mmap_debug_info(ErtsMemMapper* mm, Process* p)
         HRelease(p, hp_end, hp);
         return list;
     }
-    else {
-        return am_undefined;
-    }
+#endif
+    return am_undefined;
 }
 
 
diff --git a/erts/emulator/sys/common/erl_mmap.h b/erts/emulator/sys/common/erl_mmap.h
index b3c45ba116..7ac61a82c1 100644
--- a/erts/emulator/sys/common/erl_mmap.h
+++ b/erts/emulator/sys/common/erl_mmap.h
@@ -26,9 +26,36 @@
 #define ERTS_MMAP_SUPERALIGNED_BITS (18)
 /* Affects hard limits for sbct and lmbcs documented in erts_alloc.xml */
 
-#define ERTS_MMAPFLG_OS_ONLY			(((Uint32) 1) << 0)
-#define ERTS_MMAPFLG_SUPERCARRIER_ONLY		(((Uint32) 1) << 1)
-#define ERTS_MMAPFLG_SUPERALIGNED		(((Uint32) 1) << 2)
+#ifndef HAVE_MMAP
+#  define HAVE_MMAP 0
+#endif
+#ifndef HAVE_MREMAP
+#  define HAVE_MREMAP 0
+#endif
+#if HAVE_MMAP
+#  define ERTS_HAVE_OS_MMAP 1
+#  define ERTS_HAVE_GENUINE_OS_MMAP 1
+#  if HAVE_MREMAP
+#    define ERTS_HAVE_OS_MREMAP 1
+#  endif
+#  if defined(MAP_FIXED) && defined(MAP_NORESERVE)
+#    define ERTS_HAVE_OS_PHYSICAL_MEMORY_RESERVATION 1
+#  endif
+#endif
+
+#ifndef HAVE_VIRTUALALLOC
+#  define HAVE_VIRTUALALLOC 0
+#endif
+#if HAVE_VIRTUALALLOC
+#  define ERTS_HAVE_OS_MMAP 1
+#endif
+
+#ifdef ERTS_HAVE_GENUINE_OS_MMAP
+#  define HAVE_ERTS_MMAP 1
+#else
+#  define HAVE_ERTS_MMAP 0
+#endif
+
 
 extern UWord erts_page_inv_mask;
 
@@ -60,26 +87,6 @@ typedef struct {
 #define ERTS_MMAP_INIT_HIPE_EXEC_INITER \
     {{NULL, NULL}, {NULL, NULL}, ERTS_HIPE_EXEC_VIRTUAL_AREA_SIZE, 1, (1 << 10), 0}
 
-typedef struct ErtsMemMapper_ ErtsMemMapper;
-
-void *erts_mmap(ErtsMemMapper*, Uint32 flags, UWord *sizep);
-void erts_munmap(ErtsMemMapper*, Uint32 flags, void *ptr, UWord size);
-void *erts_mremap(ErtsMemMapper*, Uint32 flags, void *ptr, UWord old_size, UWord *sizep);
-int erts_mmap_in_supercarrier(ErtsMemMapper*, void *ptr);
-void erts_mmap_init(ErtsMemMapper*, ErtsMMapInit*, int executable);
-struct erts_mmap_info_struct
-{
-    UWord sizes[6];
-    UWord segs[6];
-    UWord os_used;
-};
-Eterm erts_mmap_info(ErtsMemMapper*, int *print_to_p, void *print_to_arg,
-                     Eterm** hpp, Uint* szp, struct erts_mmap_info_struct*);
-Eterm erts_mmap_info_options(ErtsMemMapper*,
-                             char *prefix, int *print_to_p, void *print_to_arg,
-                             Uint **hpp, Uint *szp);
-struct process;
-Eterm erts_mmap_debug_info(ErtsMemMapper*, struct process*);
 
 #define ERTS_SUPERALIGNED_SIZE \
     (1 << ERTS_MMAP_SUPERALIGNED_BITS)
@@ -107,29 +114,34 @@ Eterm erts_mmap_debug_info(ErtsMemMapper*, struct process*);
 #define ERTS_PAGEALIGNED_SIZE \
     (ERTS_INV_PAGEALIGNED_MASK + 1)
 
-#ifndef HAVE_MMAP
-#  define HAVE_MMAP 0
-#endif
-#ifndef HAVE_MREMAP
-#  define HAVE_MREMAP 0
-#endif
-#if HAVE_MMAP
-#  define ERTS_HAVE_OS_MMAP 1
-#  define ERTS_HAVE_GENUINE_OS_MMAP 1
-#  if HAVE_MREMAP
-#    define ERTS_HAVE_OS_MREMAP 1
-#  endif
-#  if defined(MAP_FIXED) && defined(MAP_NORESERVE)
-#    define ERTS_HAVE_OS_PHYSICAL_MEMORY_RESERVATION 1
-#  endif
-#endif
+struct process;
+Eterm erts_mmap_debug_info(struct process*);
+
+#if HAVE_ERTS_MMAP
+
+typedef struct ErtsMemMapper_ ErtsMemMapper;
+
+#define ERTS_MMAPFLG_OS_ONLY			(((Uint32) 1) << 0)
+#define ERTS_MMAPFLG_SUPERCARRIER_ONLY		(((Uint32) 1) << 1)
+#define ERTS_MMAPFLG_SUPERALIGNED		(((Uint32) 1) << 2)
+
+void *erts_mmap(ErtsMemMapper*, Uint32 flags, UWord *sizep);
+void erts_munmap(ErtsMemMapper*, Uint32 flags, void *ptr, UWord size);
+void *erts_mremap(ErtsMemMapper*, Uint32 flags, void *ptr, UWord old_size, UWord *sizep);
+int erts_mmap_in_supercarrier(ErtsMemMapper*, void *ptr);
+void erts_mmap_init(ErtsMemMapper*, ErtsMMapInit*, int executable);
+struct erts_mmap_info_struct
+{
+    UWord sizes[6];
+    UWord segs[6];
+    UWord os_used;
+};
+Eterm erts_mmap_info(ErtsMemMapper*, int *print_to_p, void *print_to_arg,
+                     Eterm** hpp, Uint* szp, struct erts_mmap_info_struct*);
+Eterm erts_mmap_info_options(ErtsMemMapper*,
+                             char *prefix, int *print_to_p, void *print_to_arg,
+                             Uint **hpp, Uint *szp);
 
-#ifndef HAVE_VIRTUALALLOC
-#  define HAVE_VIRTUALALLOC 0
-#endif
-#if HAVE_VIRTUALALLOC
-#  define ERTS_HAVE_OS_MMAP 1
-#endif
 
 #ifdef ERTS_WANT_MEM_MAPPERS
 #  include "erl_alloc_types.h"
@@ -154,4 +166,6 @@ void hard_dbg_remove_mseg(void* seg, UWord sz);
 #  define HARD_DBG_REMOVE_MSEG(SEG,SZ)
 #endif
 
+#endif /* HAVE_ERTS_MMAP */
+
 #endif /* ERL_MMAP_H__ */
diff --git a/erts/emulator/sys/common/erl_mseg.c b/erts/emulator/sys/common/erl_mseg.c
index 43e75e2573..f3306a888c 100644
--- a/erts/emulator/sys/common/erl_mseg.c
+++ b/erts/emulator/sys/common/erl_mseg.c
@@ -996,10 +996,7 @@ info_options(ErtsMsegAllctr_t *ma,
 	     Uint **hpp,
 	     Uint *szp)
 {
-    Eterm res;
-
-    res = erts_mmap_info_options(&erts_dflt_mmapper,
-                                 prefix, print_to_p, print_to_arg, hpp, szp);
+    Eterm res = NIL;
 
     if (print_to_p) {
 	int to = *print_to_p;
@@ -1110,7 +1107,7 @@ info_calls(ErtsMsegAllctr_t *ma, int *print_to_p, void *print_to_arg, Uint **hpp
 
 static Eterm
 info_status(ErtsMsegAllctr_t *ma, int *print_to_p, void *print_to_arg,
-	    int begin_new_max_period, Uint **hpp, Uint *szp)
+	    int begin_new_max_period, int only_sz, Uint **hpp, Uint *szp)
 {
     Eterm res = THE_NON_VALUE;
     
@@ -1123,38 +1120,41 @@ info_status(ErtsMsegAllctr_t *ma, int *print_to_p, void *print_to_arg,
 	int to = *print_to_p;
 	void *arg = print_to_arg;
 
-	erts_print(to, arg, "cached_segments: %beu\n", ma->cache_size);
-	erts_print(to, arg, "cache_hits: %beu\n", ma->cache_hits);
-	erts_print(to, arg, "segments: %beu %beu %beu\n",
-		   ma->segments.current.no, ma->segments.max.no, ma->segments.max_ever.no);
-	erts_print(to, arg, "segments_size: %beu %beu %beu\n",
+        if (!only_sz) {
+            erts_print(to, arg, "cached_segments: %beu\n", ma->cache_size);
+            erts_print(to, arg, "cache_hits: %beu\n", ma->cache_hits);
+            erts_print(to, arg, "segments: %beu %beu %beu\n",
+                       ma->segments.current.no, ma->segments.max.no, ma->segments.max_ever.no);
+            erts_print(to, arg, "segments_watermark: %beu\n",
+                       ma->segments.current.watermark);
+        }
+        erts_print(to, arg, "segments_size: %beu %beu %beu\n",
 		   ma->segments.current.sz, ma->segments.max.sz, ma->segments.max_ever.sz);
-	erts_print(to, arg, "segments_watermark: %beu\n",
-		   ma->segments.current.watermark);
     }
 
     if (hpp || szp) {
 	res = NIL;
-	add_2tup(hpp, szp, &res,
-		 am.segments_watermark,
-		 bld_unstable_uint(hpp, szp, ma->segments.current.watermark));
-	add_4tup(hpp, szp, &res,
-		 am.segments_size,
-		 bld_unstable_uint(hpp, szp, ma->segments.current.sz),
-		 bld_unstable_uint(hpp, szp, ma->segments.max.sz),
-		 bld_unstable_uint(hpp, szp, ma->segments.max_ever.sz));
-	add_4tup(hpp, szp, &res,
-		 am.segments,
-		 bld_unstable_uint(hpp, szp, ma->segments.current.no),
-		 bld_unstable_uint(hpp, szp, ma->segments.max.no),
-		 bld_unstable_uint(hpp, szp, ma->segments.max_ever.no));
-	add_2tup(hpp, szp, &res,
-		 am.cache_hits,
-		 bld_unstable_uint(hpp, szp, ma->cache_hits));
-	add_2tup(hpp, szp, &res,
-		 am.cached_segments,
-		 bld_unstable_uint(hpp, szp, ma->cache_size));
-
+        add_4tup(hpp, szp, &res,
+                 am.segments_size,
+                 bld_unstable_uint(hpp, szp, ma->segments.current.sz),
+                 bld_unstable_uint(hpp, szp, ma->segments.max.sz),
+                 bld_unstable_uint(hpp, szp, ma->segments.max_ever.sz));
+        if (!only_sz) {
+            add_2tup(hpp, szp, &res,
+                     am.segments_watermark,
+                     bld_unstable_uint(hpp, szp, ma->segments.current.watermark));
+            add_4tup(hpp, szp, &res,
+                     am.segments,
+                     bld_unstable_uint(hpp, szp, ma->segments.current.no),
+                     bld_unstable_uint(hpp, szp, ma->segments.max.no),
+                     bld_unstable_uint(hpp, szp, ma->segments.max_ever.no));
+            add_2tup(hpp, szp, &res,
+                     am.cache_hits,
+                     bld_unstable_uint(hpp, szp, ma->cache_hits));
+            add_2tup(hpp, szp, &res,
+                     am.cached_segments,
+                     bld_unstable_uint(hpp, szp, ma->cache_size));
+        }
     }
 
     if (begin_new_max_period) {
@@ -1166,26 +1166,31 @@ info_status(ErtsMsegAllctr_t *ma, int *print_to_p, void *print_to_arg,
 }
 
 static Eterm info_memkind(ErtsMsegAllctr_t *ma, int *print_to_p, void *print_to_arg,
-			  int begin_max_per, Uint **hpp, Uint *szp)
+			  int begin_max_per, int only_sz, Uint **hpp, Uint *szp)
 {
     Eterm res = THE_NON_VALUE;
     Eterm atoms[3];
     Eterm values[3];
 
-    if (print_to_p) {
-	erts_print(*print_to_p, print_to_arg, "memory kind: %s\n", "all memory");
-    }
-    if (hpp || szp) {
-	atoms[0] = am.name;
-	atoms[1] = am.status;
-	atoms[2] = am.calls;
-	values[0] = erts_bld_string(hpp, szp, "all memory");
+    if (!only_sz) {
+        if (print_to_p) {
+            erts_print(*print_to_p, print_to_arg, "memory kind: %s\n", "all memory");
+        }
+        if (hpp || szp) {
+            atoms[0] = am.name;
+            atoms[1] = am.status;
+            atoms[2] = am.calls;
+            values[0] = erts_bld_string(hpp, szp, "all memory");
+        }
     }
-    values[1] = info_status(ma, print_to_p, print_to_arg, begin_max_per, hpp, szp);
-    values[2] = info_calls(ma, print_to_p, print_to_arg, hpp, szp);
+    res = info_status(ma, print_to_p, print_to_arg, begin_max_per, only_sz, hpp, szp);
+    if (!only_sz) {
+        values[1] = res;
+        values[2] = info_calls(ma, print_to_p, print_to_arg, hpp, szp);
 
-    if (hpp || szp)
-	res = bld_2tup_list(hpp, szp, 3, atoms, values);
+        if (hpp || szp)
+            res = bld_2tup_list(hpp, szp, 3, atoms, values);
+    }
 
     return res;
 }
@@ -1229,6 +1234,7 @@ erts_mseg_info(int ix,
 	       int *print_to_p,
 	       void *print_to_arg,
 	       int begin_max_per,
+               int only_sz,
 	       Uint **hpp,
 	       Uint *szp)
 {
@@ -1239,24 +1245,29 @@ erts_mseg_info(int ix,
     Uint n = 0;
 
     if (hpp || szp) {
-	
-	if (!atoms_initialized)
-	    init_atoms(ma);
-
-	atoms[0] = am.version;
-	atoms[1] = am.options;
-	atoms[2] = am.memkind;
-	atoms[3] = am.memkind;
+        if (!atoms_initialized)
+            init_atoms(ma);
+    }
+    if (!only_sz) {
+        if (hpp || szp) {
+            atoms[0] = am.version;
+            atoms[1] = am.options;
+            atoms[2] = am.memkind;
+        }
+        values[n++] = info_version(ma, print_to_p, print_to_arg, hpp, szp);
+        values[n++] = info_options(ma, "option ", print_to_p, print_to_arg, hpp, szp);
     }
-    values[n++] = info_version(ma, print_to_p, print_to_arg, hpp, szp);
-    values[n++] = info_options(ma, "option ", print_to_p, print_to_arg, hpp, szp);
 
     ERTS_MSEG_LOCK(ma);
     ERTS_DBG_MA_CHK_THR_ACCESS(ma);
 
-    values[n++] = info_memkind(ma, print_to_p, print_to_arg, begin_max_per, hpp, szp);
-    if (hpp || szp)
-	res = bld_2tup_list(hpp, szp, n, atoms, values);
+    res = info_memkind(ma, print_to_p, print_to_arg, begin_max_per, only_sz, hpp, szp);
+
+    if (!only_sz) {
+        values[n++] = res;
+        if (hpp || szp)
+            res = bld_2tup_list(hpp, szp, n, atoms, values);
+    }
 
     ERTS_MSEG_UNLOCK(ma);
 
diff --git a/erts/emulator/sys/common/erl_mseg.h b/erts/emulator/sys/common/erl_mseg.h
index 192e5767e4..a43b409e94 100644
--- a/erts/emulator/sys/common/erl_mseg.h
+++ b/erts/emulator/sys/common/erl_mseg.h
@@ -99,7 +99,7 @@ void  erts_mseg_init(ErtsMsegInit_t *init);
 void  erts_mseg_late_init(void); /* Have to be called after all allocators,
 				   threads and timers have been initialized. */
 Eterm erts_mseg_info_options(int, int *, void*, Uint **, Uint *);
-Eterm erts_mseg_info(int, int *, void*, int, Uint **, Uint *);
+Eterm erts_mseg_info(int, int *, void*, int, int, Uint **, Uint *);
 
 #endif /* #if HAVE_ERTS_MSEG */
 
diff --git a/erts/emulator/test/alloc_SUITE.erl b/erts/emulator/test/alloc_SUITE.erl
index 5fb560d1ec..1f7b499dcb 100644
--- a/erts/emulator/test/alloc_SUITE.erl
+++ b/erts/emulator/test/alloc_SUITE.erl
@@ -102,8 +102,8 @@ erts_mmap_do(Config, SCO, SCRPM, SCRFSD) ->
     Self = self(),
     Ref = make_ref(),
     F = fun() ->
-                SI = erlang:system_info({allocator,mseg_alloc}),
-                {erts_mmap,EM} = lists:keyfind(erts_mmap, 1, SI),
+                SI = erlang:system_info({allocator,erts_mmap}),
+                {default_mmap,EM} = lists:keyfind(default_mmap, 1, SI),
                 {supercarrier,SC} = lists:keyfind(supercarrier, 1, EM),
                 {sizes,Sizes} = lists:keyfind(sizes, 1, SC),
                 {free_segs,Segs} = lists:keyfind(free_segs,1,SC),