| Subject | [PATCH 01 of 66] disable lumpy when compaction is enabled | Date | Wed, 03 Nov 2010 16:27:36 +0100 | From | Andrea Arcangeli <> |
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From: Andrea Arcangeli <aarcange@redhat.com>
Compaction is more reliable than lumpy, and lumpy makes the system unusable when it runs.
Signed-off-by: Andrea Arcangeli <aarcange@redhat.com> ---
diff --git a/mm/vmscan.c b/mm/vmscan.c --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -274,6 +274,7 @@ unsigned long shrink_slab(unsigned long static void set_lumpy_reclaim_mode(int priority, struct scan_control *sc, bool sync) { +#ifndef CONFIG_COMPACTION enum lumpy_mode mode = sync ? LUMPY_MODE_SYNC : LUMPY_MODE_ASYNC; /* @@ -294,11 +295,14 @@ static void set_lumpy_reclaim_mode(int p sc->lumpy_reclaim_mode = mode; else sc->lumpy_reclaim_mode = LUMPY_MODE_NONE; +#endif } static void disable_lumpy_reclaim_mode(struct scan_control *sc) { +#ifndef CONFIG_COMPACTION sc->lumpy_reclaim_mode = LUMPY_MODE_NONE; +#endif } static inline int is_page_cache_freeable(struct page *page) @@ -321,9 +325,11 @@ static int may_write_to_queue(struct bac if (bdi == current->backing_dev_info) return 1; +#ifndef CONFIG_COMPACTION /* lumpy reclaim for hugepage often need a lot of write */ if (sc->order > PAGE_ALLOC_COSTLY_ORDER) return 1; +#endif return 0; }
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