| Subject | [PATCH 52 of 66] enable direct defrag | Date | Wed, 03 Nov 2010 16:28:27 +0100 | From | Andrea Arcangeli <> |
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From: Andrea Arcangeli <aarcange@redhat.com>
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).
Signed-off-by: Andrea Arcangeli <aarcange@redhat.com> ---
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 */
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