Require more high order pages in the watermarks, to give more margin for concurrent allocations. If there are too few pages, they can disappear too soon. Signed-off-by: Andrea Arcangeli <aarcange@xxxxxxxxxx> --- mm/page_alloc.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 3931d16..c13e062 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -1646,7 +1646,8 @@ static bool __zone_watermark_ok(struct zone *z, int order, unsigned long mark, free_pages -= z->free_area[o].nr_free << o; /* Require fewer higher order pages to be free */ - min >>= 1; + if (o >= pageblock_order-1) + min >>= 1; if (free_pages <= min) return false; -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>