On Wed, Nov 03, 2010 at 04:28:27PM +0100, Andrea Arcangeli wrote: > From: Andrea Arcangeli <aarcange@xxxxxxxxxx> > > With memory compaction in, and lumpy-reclaim removed, it seems safe enough to > defrag memory during the (synchronous) transparent hugepage page faults > (TRANSPARENT_HUGEPAGE_DEFRAG_FLAG) and not only during khugepaged (async) > hugepage allocations that was already enabled even before memory compaction was > in (TRANSPARENT_HUGEPAGE_DEFRAG_KHUGEPAGED_FLAG). > While I'm hoping that my series on using compaction will be used instead of outright deletion of lumpy reclaim, this patch would still make sense. Acked-by: Mel Gorman <mel@xxxxxxxxx> > Signed-off-by: Andrea Arcangeli <aarcange@xxxxxxxxxx> > --- > > diff --git a/mm/huge_memory.c b/mm/huge_memory.c > --- a/mm/huge_memory.c > +++ b/mm/huge_memory.c > @@ -28,6 +28,7 @@ > */ > unsigned long transparent_hugepage_flags __read_mostly = > (1<<TRANSPARENT_HUGEPAGE_FLAG)| > + (1<<TRANSPARENT_HUGEPAGE_DEFRAG_FLAG)| > (1<<TRANSPARENT_HUGEPAGE_DEFRAG_KHUGEPAGED_FLAG); > > /* default scan 8*512 pte (or vmas) every 30 second */ > -- Mel Gorman Part-time Phd Student Linux Technology Center University of Limerick IBM Dublin Software Lab -- 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>