Merge branch 'maint-20' into maint

* maint-20:
  Updated OTP version
  Update release notes
  Update version numbers
  erts: Add system_flags(erts_alloc,"+M?sbct *")
  erts: Add age order first fit allocator strategies
  erts: Refactor erl_ao_firstfit_alloc
  erts: Add migration options "acnl" and "acfml"
  kernel: Add os:cmd/2 with max_size option
  erts: Add more stats for mbcs_pool
  erts: Fix alloc_SUITE:migration
  stdlib: Make ets_SUITE memory check try again
  erts: Improve carrier pool search
  erts: Improve alloc_SUITE:migration
  erts: Refactor carrier dealloc migration

1 files changed, 20 insertions, 6 deletions

diff --git a/lib/stdlib/test/ets_SUITE.erl b/lib/stdlib/test/ets_SUITE.erl
index 05451a83fb..1a8260b041 100644
--- a/lib/stdlib/test/ets_SUITE.erl
+++ b/lib/stdlib/test/ets_SUITE.erl
@@ -6033,17 +6033,23 @@ etsmem() ->
 	 end},
     {Mem,AllTabs}.
 
-verify_etsmem({MemInfo,AllTabs}) ->
+
+verify_etsmem(MI) ->
     wait_for_test_procs(),
+    verify_etsmem(MI, 1).
+
+verify_etsmem({MemInfo,AllTabs}, Try) ->
     case etsmem() of
 	{MemInfo,_} ->
 	    io:format("Ets mem info: ~p", [MemInfo]),
-	    case MemInfo of
-		{ErlMem,EtsAlloc} when ErlMem == notsup; EtsAlloc == undefined ->
+	    case {MemInfo, Try} of
+		{{ErlMem,EtsAlloc},_} when ErlMem == notsup; EtsAlloc == undefined ->
 		    %% Use 'erl +Mea max' to do more complete memory leak testing.
 		    {comment,"Incomplete or no mem leak testing"};
-		_ ->
-                    ok
+		{_, 1} ->
+                    ok;
+                _ ->
+                    {comment, "Transient memory discrepancy"}
 	    end;
 
 	{MemInfo2, AllTabs2} ->
@@ -6051,7 +6057,15 @@ verify_etsmem({MemInfo,AllTabs}) ->
 	    io:format("Actual:   ~p", [MemInfo2]),
 	    io:format("Changed tables before: ~p\n",[AllTabs -- AllTabs2]),
 	    io:format("Changed tables after: ~p\n", [AllTabs2 -- AllTabs]),
-            ct:fail("Failed memory check")
+            case Try < 2 of
+                true ->
+                    io:format("\nThis discrepancy could be caused by an "
+                              "inconsistent memory \"snapshot\""
+                              "\nTry again...\n", []),
+                    verify_etsmem({MemInfo, AllTabs}, Try+1);
+                false ->
+                    ct:fail("Failed memory check")
+            end
     end.