On store buffer overflow we mark individidual pages for...

src/incremental-marking.cc

Index: src/incremental-marking.cc
===================================================================
--- src/incremental-marking.cc	(revision 7374)
+++ src/incremental-marking.cc	(working copy)
@@ -39,6 +39,7 @@
 
 double IncrementalMarking::steps_took_ = 0;
 int IncrementalMarking::steps_count_ = 0;
+bool IncrementalMarking::should_hurry_ = false;
 
 static intptr_t allocated = 0;
 
@@ -145,7 +146,7 @@
 
 bool IncrementalMarking::WorthActivating() {
 #ifndef DEBUG
-  static const intptr_t kActivationThreshold = 20*MB;
+  static const intptr_t kActivationThreshold = 8 * MB;
 #else
   // TODO(gc) consider setting this to some low level so that some
   // debug tests run with incremental marking and some without.
@@ -312,6 +313,12 @@
 
 void IncrementalMarking::MarkingComplete() {
   state_ = COMPLETE;
+  // We will set the stack guard to request a GC now.  This will mean the rest
+  // of the GC gets performed as soon as possible (we can't do a GC here in a
+  // record-write context).  If a few things get allocated between now and then
+  // that shouldn't make us do a scavenge and keep being incremental, so we set
+  // the should-hurry flag to indicate that there can't be much work left to do.
+  set_should_hurry(true);
   if (FLAG_trace_incremental_marking) {
     PrintF("[IncrementalMarking] Complete (normal).\n");
   }