From: Andi Kleen <a...@linux.intel.com> Using 2MB allows modern kernels to use 2MB huge pages on x86.
gcc/: 2011-10-08 Andi Kleen <a...@linux.intel.com> * ggc-page.c (GGC_QUIRE_SIZE): Increase to 512 --- gcc/ggc-page.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/gcc/ggc-page.c b/gcc/ggc-page.c index b0b3b3f..1f52b56 100644 --- a/gcc/ggc-page.c +++ b/gcc/ggc-page.c @@ -469,7 +469,7 @@ 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 -- 1.7.5.4