Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754072Ab2ENFBe (ORCPT ); Mon, 14 May 2012 01:01:34 -0400 Received: from mail-pz0-f46.google.com ([209.85.210.46]:63230 "EHLO mail-pz0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751937Ab2ENFBc (ORCPT ); Mon, 14 May 2012 01:01:32 -0400 Date: Sun, 13 May 2012 22:01:15 -0700 (PDT) From: Hugh Dickins X-X-Sender: hugh@eggly.anvils To: Andrew Morton cc: Konstantin Khlebnikov , KAMEZAWA Hiroyuki , Johannes Weiner , Michal Hocko , linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: [PATCH 2/3] mm: trivial cleanups in vmscan.c In-Reply-To: Message-ID: References: User-Agent: Alpine 2.00 (LSU 1167 2008-08-23) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3426 Lines: 101 Utter trivia in mm/vmscan.c, mostly just reducing the linecount slightly; most exciting change being get_scan_count() calling vmscan_swappiness() once instead of twice. Signed-off-by: Hugh Dickins --- mm/vmscan.c | 31 ++++++++++--------------------- 1 file changed, 10 insertions(+), 21 deletions(-) --- 3046N.orig/mm/vmscan.c 2012-05-13 20:41:24.334117380 -0700 +++ 3046N/mm/vmscan.c 2012-05-13 20:41:51.566118170 -0700 @@ -1025,12 +1025,9 @@ static unsigned long isolate_lru_pages(u unsigned long *nr_scanned, struct scan_control *sc, isolate_mode_t mode, enum lru_list lru) { - struct list_head *src; + struct list_head *src = &lruvec->lists[lru]; unsigned long nr_taken = 0; unsigned long scan; - int file = is_file_lru(lru); - - src = &lruvec->lists[lru]; for (scan = 0; scan < nr_to_scan && !list_empty(src); scan++) { struct page *page; @@ -1058,11 +1055,8 @@ static unsigned long isolate_lru_pages(u } *nr_scanned = scan; - - trace_mm_vmscan_lru_isolate(sc->order, - nr_to_scan, scan, - nr_taken, - mode, file); + trace_mm_vmscan_lru_isolate(sc->order, nr_to_scan, scan, + nr_taken, mode, is_file_lru(lru)); return nr_taken; } @@ -1140,8 +1134,7 @@ static int too_many_isolated(struct zone } static noinline_for_stack void -putback_inactive_pages(struct lruvec *lruvec, - struct list_head *page_list) +putback_inactive_pages(struct lruvec *lruvec, struct list_head *page_list) { struct zone_reclaim_stat *reclaim_stat = &lruvec->reclaim_stat; struct zone *zone = lruvec_zone(lruvec); @@ -1235,11 +1228,9 @@ shrink_inactive_list(unsigned long nr_to if (global_reclaim(sc)) { zone->pages_scanned += nr_scanned; if (current_is_kswapd()) - __count_zone_vm_events(PGSCAN_KSWAPD, zone, - nr_scanned); + __count_zone_vm_events(PGSCAN_KSWAPD, zone, nr_scanned); else - __count_zone_vm_events(PGSCAN_DIRECT, zone, - nr_scanned); + __count_zone_vm_events(PGSCAN_DIRECT, zone, nr_scanned); } spin_unlock_irq(&zone->lru_lock); @@ -1534,9 +1525,9 @@ static int inactive_file_is_low(struct l return inactive_file_is_low_global(lruvec_zone(lruvec)); } -static int inactive_list_is_low(struct lruvec *lruvec, int file) +static int inactive_list_is_low(struct lruvec *lruvec, enum lru_list lru) { - if (file) + if (is_file_lru(lru)) return inactive_file_is_low(lruvec); else return inactive_anon_is_low(lruvec); @@ -1545,10 +1536,8 @@ static int inactive_list_is_low(struct l static unsigned long shrink_list(enum lru_list lru, unsigned long nr_to_scan, struct lruvec *lruvec, struct scan_control *sc) { - int file = is_file_lru(lru); - if (is_active_lru(lru)) { - if (inactive_list_is_low(lruvec, file)) + if (inactive_list_is_low(lruvec, lru)) shrink_active_list(nr_to_scan, lruvec, sc, lru); return 0; } @@ -1630,7 +1619,7 @@ static void get_scan_count(struct lruvec * This scanning priority is essentially the inverse of IO cost. */ anon_prio = vmscan_swappiness(sc); - file_prio = 200 - vmscan_swappiness(sc); + file_prio = 200 - anon_prio; /* * OK, so we have swap space and a fair amount of page cache -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/