> From: Andrea Arcangeli <aarcange@xxxxxxxxxx> > > With transparent hugepage support we need compaction for the "defrag" sysfs > controls to be effective. > > Signed-off-by: Andrea Arcangeli <aarcange@xxxxxxxxxx> > --- > > diff --git a/mm/Kconfig b/mm/Kconfig > --- a/mm/Kconfig > +++ b/mm/Kconfig > @@ -305,6 +305,7 @@ config NOMMU_INITIAL_TRIM_EXCESS > config TRANSPARENT_HUGEPAGE > bool "Transparent Hugepage Support" > depends on X86 && MMU > + select COMPACTION > help > Transparent Hugepages allows the kernel to use huge pages and > huge tlb transparently to the applications whenever possible. I dislike this. THP and compaction are completely orthogonal. I think you are talking only your performance recommendation. I mean I dislike Kconfig 'select' hell and I hope every developers try to avoid it as far as possible. Thanks. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxxx For more info on Linux MM, see: http://www.linux-mm.org/ . Fight unfair telecom policy in Canada: sign http://dissolvethecrtc.ca/ Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>