PartitionAlloc: Increase the number of pages per bucket

third_party/WebKit/Source/wtf/PartitionAlloc.h

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 241 matching lines @@
     uint16_t numUnprovisionedSlots;
     uint16_t pageOffset;
     int16_t emptyCacheIndex; // -1 if not in the empty cache.
 };
 
 struct PartitionBucket {
     PartitionPage* activePagesHead; // Accessed most in hot path => goes first.
     PartitionPage* emptyPagesHead;
     PartitionPage* decommittedPagesHead;
     uint32_t slotSize;
-    uint16_t numSystemPagesPerSlotSpan;
-    uint16_t numFullPages;
+    unsigned numSystemPagesPerSlotSpan : 8;

[bashi, 2016/01/26 23:52:37]

uint32_t ?

[haraken, 2016/01/27 01:19:32]

The style checker asks us to use unsigned for a bit-field.

+    unsigned numFullPages : 24;

[bashi, 2016/01/26 23:52:37]

ditto.

 };
 
 // An "extent" is a span of consecutive superpages. We link to the partition's
 // next extent (if there is one) at the very start of a superpage's metadata
 // area.
 struct PartitionSuperPageExtentEntry {
     PartitionRootBase* root;
     char* superPageBase;
     char* superPagesEnd;
     PartitionSuperPageExtentEntry* next;
@@ skipping 595 matching lines @@
 using WTF::partitionAlloc;
 using WTF::partitionFree;
 using WTF::partitionAllocGeneric;
 using WTF::partitionFreeGeneric;
 using WTF::partitionReallocGeneric;
 using WTF::partitionAllocActualSize;
 using WTF::partitionAllocSupportsGetSize;
 using WTF::partitionAllocGetSize;
 
 #endif // WTF_PartitionAlloc_h