Increase the GGC quire size to 2MB

gcc/:

2011-10-08  Andi Kleen  <ak@linux.intel.com>

	* ggc-page.c (GGC_QUIRE_SIZE): Increase to 512

From-SVN: r180066

gcc/ChangeLog

+2011-10-08  Andi Kleen  <ak@linux.intel.com>
+
+	* ggc-page.c (GGC_QUIRE_SIZE): Increase to 512
+
 2011-10-13  Andi Kleen  <ak@linux.intel.com>
 
 	* toplev.c (compile_file): Rename __gnu_slim_lto to __gnu_lto_slim.

gcc/ggc-page.c

@@ -462,7 +462,7 @@ static struct globals
    can override this by defining GGC_QUIRE_SIZE explicitly.  */
 #ifndef GGC_QUIRE_SIZE
 # ifdef USING_MMAP
-#  define GGC_QUIRE_SIZE 256
+#  define GGC_QUIRE_SIZE 512	/* 2MB for 4K pages */
 # else
 #  define GGC_QUIRE_SIZE 16
 # endif