From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wi0-f177.google.com (mail-wi0-f177.google.com [209.85.212.177]) by kanga.kvack.org (Postfix) with ESMTP id 2D1356B0070 for ; Mon, 19 Jan 2015 05:05:54 -0500 (EST) Received: by mail-wi0-f177.google.com with SMTP id r20so7457962wiv.4 for ; Mon, 19 Jan 2015 02:05:53 -0800 (PST) Received: from mx2.suse.de (cantor2.suse.de. [195.135.220.15]) by mx.google.com with ESMTPS id r3si20290063wic.39.2015.01.19.02.05.42 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Mon, 19 Jan 2015 02:05:42 -0800 (PST) From: Vlastimil Babka Subject: [PATCH 3/5] mm, compaction: encapsulate resetting cached scanner positions Date: Mon, 19 Jan 2015 11:05:18 +0100 Message-Id: <1421661920-4114-4-git-send-email-vbabka@suse.cz> In-Reply-To: <1421661920-4114-1-git-send-email-vbabka@suse.cz> References: <1421661920-4114-1-git-send-email-vbabka@suse.cz> Sender: owner-linux-mm@kvack.org List-ID: To: linux-mm@kvack.org Cc: linux-kernel@vger.kernel.org, Andrew Morton , Vlastimil Babka , Minchan Kim , Mel Gorman , Joonsoo Kim , Michal Nazarewicz , Naoya Horiguchi , Christoph Lameter , Rik van Riel , David Rientjes Reseting the cached compaction scanner positions is now done implicitly in __reset_isolation_suitable() and compact_finished(). Encapsulate the functionality in a new function reset_cached_positions() and call it explicitly where needed. Signed-off-by: Vlastimil Babka Cc: Minchan Kim Cc: Mel Gorman Cc: Joonsoo Kim Cc: Michal Nazarewicz Cc: Naoya Horiguchi Cc: Christoph Lameter Cc: Rik van Riel Cc: David Rientjes --- mm/compaction.c | 22 ++++++++++++++-------- 1 file changed, 14 insertions(+), 8 deletions(-) diff --git a/mm/compaction.c b/mm/compaction.c index 45799a4..5626220 100644 --- a/mm/compaction.c +++ b/mm/compaction.c @@ -123,6 +123,13 @@ static inline bool isolation_suitable(struct compact_control *cc, return !get_pageblock_skip(page); } +static void reset_cached_positions(struct zone *zone) +{ + zone->compact_cached_migrate_pfn[0] = zone->zone_start_pfn; + zone->compact_cached_migrate_pfn[1] = zone->zone_start_pfn; + zone->compact_cached_free_pfn = zone_end_pfn(zone); +} + /* * This function is called to clear all cached information on pageblocks that * should be skipped for page isolation when the migrate and free page scanner @@ -134,9 +141,6 @@ static void __reset_isolation_suitable(struct zone *zone) unsigned long end_pfn = zone_end_pfn(zone); unsigned long pfn; - zone->compact_cached_migrate_pfn[0] = start_pfn; - zone->compact_cached_migrate_pfn[1] = start_pfn; - zone->compact_cached_free_pfn = end_pfn; zone->compact_blockskip_flush = false; /* Walk the zone and mark every pageblock as suitable for isolation */ @@ -166,8 +170,10 @@ void reset_isolation_suitable(pg_data_t *pgdat) continue; /* Only flush if a full compaction finished recently */ - if (zone->compact_blockskip_flush) + if (zone->compact_blockskip_flush) { __reset_isolation_suitable(zone); + reset_cached_positions(zone); + } } } @@ -1059,9 +1065,7 @@ static int compact_finished(struct zone *zone, struct compact_control *cc, /* Compaction run completes if the migrate and free scanner meet */ if (compact_scanners_met(cc)) { /* Let the next compaction start anew. */ - zone->compact_cached_migrate_pfn[0] = zone->zone_start_pfn; - zone->compact_cached_migrate_pfn[1] = zone->zone_start_pfn; - zone->compact_cached_free_pfn = zone_end_pfn(zone); + reset_cached_positions(zone); /* * Mark that the PG_migrate_skip information should be cleared @@ -1187,8 +1191,10 @@ static int compact_zone(struct zone *zone, struct compact_control *cc) * is about to be retried after being deferred. kswapd does not do * this reset as it'll reset the cached information when going to sleep. */ - if (compaction_restarting(zone, cc->order) && !current_is_kswapd()) + if (compaction_restarting(zone, cc->order) && !current_is_kswapd()) { __reset_isolation_suitable(zone); + reset_cached_positions(zone); + } /* * Setup to move all movable pages to the end of the zone. Used cached -- 2.1.2 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org