From 6e5ef1a96e6e3b123da56292bc35017c8c401491 Mon Sep 17 00:00:00 2001 From: Christoph Lameter Date: Wed, 22 Mar 2006 00:08:45 -0800 Subject: [PATCH] [PATCH] vmscan: emove obsolete checks from shrink_list() and fix unlikely in refill_inactive_zone() As suggested by Marcelo: 1. The optimization introduced recently for not calling page_referenced() during zone reclaim makes two additional checks in shrink_list unnecessary. 2. The if (unlikely(sc->may_swap)) in refill_inactive_zone is optimized for the zone_reclaim case. However, most peoples system only does swap. Undo that. Signed-off-by: Christoph Lameter Cc: Marcelo Tosatti Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- mm/vmscan.c | 13 ++----------- 1 file changed, 2 insertions(+), 11 deletions(-) diff --git a/mm/vmscan.c b/mm/vmscan.c index 3914a94aa90..f713e9f6ac7 100644 --- a/mm/vmscan.c +++ b/mm/vmscan.c @@ -460,12 +460,9 @@ static unsigned long shrink_page_list(struct list_head *page_list, * Anonymous process memory has backing store? * Try to allocate it some swap space here. */ - if (PageAnon(page) && !PageSwapCache(page)) { - if (!sc->may_swap) - goto keep_locked; + if (PageAnon(page) && !PageSwapCache(page)) if (!add_to_swap(page, GFP_ATOMIC)) goto activate_locked; - } #endif /* CONFIG_SWAP */ mapping = page_mapping(page); @@ -477,12 +474,6 @@ static unsigned long shrink_page_list(struct list_head *page_list, * processes. Try to unmap it here. */ if (page_mapped(page) && mapping) { - /* - * No unmapping if we do not swap - */ - if (!sc->may_swap) - goto keep_locked; - switch (try_to_unmap(page, 0)) { case SWAP_FAIL: goto activate_locked; @@ -1205,7 +1196,7 @@ static void shrink_active_list(unsigned long nr_pages, struct zone *zone, struct pagevec pvec; int reclaim_mapped = 0; - if (unlikely(sc->may_swap)) { + if (sc->may_swap) { long mapped_ratio; long distress; long swap_tendency; -- 2.20.1