> 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 */ Perhaps comment that 2MB was chosen to help Kernel huge pages logic?
Honza > # else > # define GGC_QUIRE_SIZE 16 > # endif > -- > 1.7.5.4
