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Date: Mon, 23 Sep 2013 16:21:49 +0800 From: Weijie Yang <weijie.yang@...sung.com> To: akpm@...ux-foundation.org Cc: sjenning@...ux.vnet.ibm.com, bob.liu@...cle.com, minchan@...nel.org, weijie.yang.kh@...il.com, linux-mm@...ck.org, linux-kernel@...r.kernel.org, stable@...r.kernel.org, d.j.shin@...sung.com, heesub.shin@...sung.com, kyungmin.park@...sung.com, hau.chen@...sung.com, bifeng.tong@...sung.com, rui.xie@...sung.com Subject: [PATCH v3 3/3] mm/zswap: avoid unnecessary page scanning add SetPageReclaim before __swap_writepage so that page can be moved to the tail of the inactive list, which can avoid unnecessary page scanning as this page was reclaimed by swap subsystem before. Signed-off-by: Weijie Yang <weijie.yang@...sung.com> Reviewed-by: Bob Liu <bob.liu@...cle.com> Cc: Minchan Kim <minchan@...nel.org> Cc: stable@...r.kernel.org Acked-by: Seth Jennings <sjenning@...ux.vnet.ibm.com> --- mm/zswap.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/mm/zswap.c b/mm/zswap.c index 1be7b90..cc40e6a 100644 --- a/mm/zswap.c +++ b/mm/zswap.c @@ -556,6 +556,9 @@ static int zswap_writeback_entry(struct zbud_pool *pool, unsigned long handle) SetPageUptodate(page); } + /* move it to the tail of the inactive list after end_writeback */ + SetPageReclaim(page); + /* start writeback */ __swap_writepage(page, &wbc, end_swap_bio_write); page_cache_release(page); -- 1.7.10.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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