From mboxrd@z Thu Jan 1 00:00:00 1970 From: m.szyprowski@samsung.com (Marek Szyprowski) Date: Wed, 22 Feb 2012 17:48:48 +0100 Subject: [PATCHv23 07/16] mm: page_alloc: change fallbacks array handling In-Reply-To: <1329929337-16648-1-git-send-email-m.szyprowski@samsung.com> References: <1329929337-16648-1-git-send-email-m.szyprowski@samsung.com> Message-ID: <1329929337-16648-8-git-send-email-m.szyprowski@samsung.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org From: Michal Nazarewicz This commit adds a row for MIGRATE_ISOLATE type to the fallbacks array which was missing from it. It also, changes the array traversal logic a little making MIGRATE_RESERVE an end marker. The letter change, removes the implicit MIGRATE_UNMOVABLE from the end of each row which was read by __rmqueue_fallback() function. Signed-off-by: Michal Nazarewicz Signed-off-by: Marek Szyprowski Acked-by: Mel Gorman Reviewed-by: KAMEZAWA Hiroyuki Tested-by: Rob Clark Tested-by: Ohad Ben-Cohen Tested-by: Benjamin Gaignard Tested-by: Robert Nelson --- mm/page_alloc.c | 9 +++++---- 1 files changed, 5 insertions(+), 4 deletions(-) diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 24094058..ad840a7 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -888,11 +888,12 @@ struct page *__rmqueue_smallest(struct zone *zone, unsigned int order, * This array describes the order lists are fallen back to when * the free lists for the desirable migrate type are depleted */ -static int fallbacks[MIGRATE_TYPES][MIGRATE_TYPES-1] = { +static int fallbacks[MIGRATE_TYPES][3] = { [MIGRATE_UNMOVABLE] = { MIGRATE_RECLAIMABLE, MIGRATE_MOVABLE, MIGRATE_RESERVE }, [MIGRATE_RECLAIMABLE] = { MIGRATE_UNMOVABLE, MIGRATE_MOVABLE, MIGRATE_RESERVE }, [MIGRATE_MOVABLE] = { MIGRATE_RECLAIMABLE, MIGRATE_UNMOVABLE, MIGRATE_RESERVE }, - [MIGRATE_RESERVE] = { MIGRATE_RESERVE, MIGRATE_RESERVE, MIGRATE_RESERVE }, /* Never used */ + [MIGRATE_RESERVE] = { MIGRATE_RESERVE }, /* Never used */ + [MIGRATE_ISOLATE] = { MIGRATE_RESERVE }, /* Never used */ }; /* @@ -987,12 +988,12 @@ __rmqueue_fallback(struct zone *zone, int order, int start_migratetype) /* Find the largest possible block of pages in the other list */ for (current_order = MAX_ORDER-1; current_order >= order; --current_order) { - for (i = 0; i < MIGRATE_TYPES - 1; i++) { + for (i = 0;; i++) { migratetype = fallbacks[start_migratetype][i]; /* MIGRATE_RESERVE handled later if necessary */ if (migratetype == MIGRATE_RESERVE) - continue; + break; area = &(zone->free_area[current_order]); if (list_empty(&area->free_list[migratetype])) -- 1.7.1.569.g6f426