# HG changeset patch
# User jprovino
# Date 1450195260 0
# Node ID 7afedbda9c36020f48ad4ccde0f4afdc1c6d366a
# Parent  45801556e636ea69a857fe4d33a036549a20671c# Parent  e75913632d00df4222fc4362201aecfb07e6580d
Merge

diff -r 45801556e636 -r 7afedbda9c36 hotspot/src/share/vm/gc/cms/compactibleFreeListSpace.cpp
--- a/hotspot/src/share/vm/gc/cms/compactibleFreeListSpace.cpp	Thu Dec 10 20:14:00 2015 +0300
+++ b/hotspot/src/share/vm/gc/cms/compactibleFreeListSpace.cpp	Tue Dec 15 16:01:00 2015 +0000
@@ -2511,7 +2511,11 @@
   // Lacking sufficient experience, CMSOldPLABResizeQuicker is disabled by
   // default.
   if (ResizeOldPLAB && CMSOldPLABResizeQuicker) {
-    size_t multiple = _num_blocks[word_sz]/(CMSOldPLABToleranceFactor*CMSOldPLABNumRefills*n_blks);
+    //
+    // On a 32-bit VM, the denominator can become zero because of integer overflow,
+    // which is why there is a cast to double.
+    //
+    size_t multiple = (size_t) (_num_blocks[word_sz]/(((double)CMSOldPLABToleranceFactor)*CMSOldPLABNumRefills*n_blks));
     n_blks +=  CMSOldPLABReactivityFactor*multiple*n_blks;
     n_blks = MIN2(n_blks, CMSOldPLABMax);
   }