On 15.10.2012 22:57, Luiz Capitulino wrote: > 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);
FWIW, there was another attempt to do something like this: https://lists.gnu.org/archive/html/qemu-devel/2012-08/msg02870.html I'm not sure it is right or not, I just tried to guess, but that one also went unanswered. Maybe you will have better luck. Thanks, /mjt
