On Fri, 5 Oct 2012 16:47:57 -0300 Luiz Capitulino <lcapitul...@redhat.com> wrote:
> This makes it possible for QEMU to use transparent huge pages (THP) > when transparent_hugepage/enabled=madvise. Otherwise THP is only > used when it's enabled system wide. > > Signed-off-by: Luiz Capitulino <lcapitul...@redhat.com> ping? > --- > exec.c | 1 + > osdep.h | 5 +++++ > 2 files changed, 6 insertions(+) > > diff --git a/exec.c b/exec.c > index 1114a09..7504909 100644 > --- a/exec.c > +++ b/exec.c > @@ -2584,6 +2584,7 @@ ram_addr_t qemu_ram_alloc_from_ptr(ram_addr_t size, > void *host, > cpu_physical_memory_set_dirty_range(new_block->offset, size, 0xff); > > qemu_ram_setup_dump(new_block->host, size); > + qemu_madvise(new_block->host, size, QEMU_MADV_HUGEPAGE); > > if (kvm_enabled()) > kvm_setup_guest_memory(new_block->host, size); > diff --git a/osdep.h b/osdep.h > index cb213e0..c5fd3d9 100644 > --- a/osdep.h > +++ b/osdep.h > @@ -108,6 +108,11 @@ void qemu_vfree(void *ptr); > #else > #define QEMU_MADV_DONTDUMP QEMU_MADV_INVALID > #endif > +#ifdef MADV_HUGEPAGE > +#define QEMU_MADV_HUGEPAGE MADV_HUGEPAGE > +#else > +#define QEMU_MADV_HUGEPAGE QEMU_MADV_INVALID > +#endif > > #elif defined(CONFIG_POSIX_MADVISE) >