From: Namhyung Kim <namhyung@gmail.com> To: Andrew Morton <akpm@linux-foundation.org> Cc: Mel Gorman <mel@csn.ul.ie>, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: [RFC PATCH] mm: handle simple case in free_pcppages_bulk() Date: Thu, 10 Feb 2011 20:46:48 +0900 [thread overview] Message-ID: <1297338408-3590-1-git-send-email-namhyung@gmail.com> (raw) Now I'm seeing that there are some cases to free all pages in a pcp lists. In that case, just frees all pages in the lists instead of being bothered with round-robin lists traversal. Signed-off-by: Namhyung Kim <namhyung@gmail.com> --- mm/page_alloc.c | 22 ++++++++++++++++++++++ 1 files changed, 22 insertions(+), 0 deletions(-) diff --git a/mm/page_alloc.c b/mm/page_alloc.c index e8b02771ccea..959c54450ddf 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -596,6 +596,28 @@ static void free_pcppages_bulk(struct zone *zone, int count, zone->all_unreclaimable = 0; zone->pages_scanned = 0; + /* Simple case: Free all */ + if (to_free == pcp->count) { + LIST_HEAD(freelist); + + for (; migratetype < MIGRATE_PCPTYPES; migratetype++) + if (!list_empty(&pcp->lists[migratetype])) + list_move(&pcp->lists[migratetype], &freelist); + + while (!list_empty(&freelist)) { + struct page *page; + + page = list_first_entry(&freelist, struct page, lru); + /* must delete as __free_one_page list manipulates */ + list_del(&page->lru); + /* MIGRATE_MOVABLE list may include MIGRATE_RESERVEs */ + __free_one_page(page, zone, 0, page_private(page)); + trace_mm_page_pcpu_drain(page, 0, page_private(page)); + to_free--; + } + VM_BUG_ON(to_free); + } + while (to_free) { struct page *page; struct list_head *list; -- 1.7.4
WARNING: multiple messages have this Message-ID (diff)
From: Namhyung Kim <namhyung@gmail.com> To: Andrew Morton <akpm@linux-foundation.org> Cc: Mel Gorman <mel@csn.ul.ie>, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: [RFC PATCH] mm: handle simple case in free_pcppages_bulk() Date: Thu, 10 Feb 2011 20:46:48 +0900 [thread overview] Message-ID: <1297338408-3590-1-git-send-email-namhyung@gmail.com> (raw) Now I'm seeing that there are some cases to free all pages in a pcp lists. In that case, just frees all pages in the lists instead of being bothered with round-robin lists traversal. Signed-off-by: Namhyung Kim <namhyung@gmail.com> --- mm/page_alloc.c | 22 ++++++++++++++++++++++ 1 files changed, 22 insertions(+), 0 deletions(-) diff --git a/mm/page_alloc.c b/mm/page_alloc.c index e8b02771ccea..959c54450ddf 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -596,6 +596,28 @@ static void free_pcppages_bulk(struct zone *zone, int count, zone->all_unreclaimable = 0; zone->pages_scanned = 0; + /* Simple case: Free all */ + if (to_free == pcp->count) { + LIST_HEAD(freelist); + + for (; migratetype < MIGRATE_PCPTYPES; migratetype++) + if (!list_empty(&pcp->lists[migratetype])) + list_move(&pcp->lists[migratetype], &freelist); + + while (!list_empty(&freelist)) { + struct page *page; + + page = list_first_entry(&freelist, struct page, lru); + /* must delete as __free_one_page list manipulates */ + list_del(&page->lru); + /* MIGRATE_MOVABLE list may include MIGRATE_RESERVEs */ + __free_one_page(page, zone, 0, page_private(page)); + trace_mm_page_pcpu_drain(page, 0, page_private(page)); + to_free--; + } + VM_BUG_ON(to_free); + } + while (to_free) { struct page *page; struct list_head *list; -- 1.7.4 -- 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/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
next reply other threads:[~2011-02-10 11:46 UTC|newest] Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top 2011-02-10 11:46 Namhyung Kim [this message] 2011-02-10 11:46 ` [RFC PATCH] mm: handle simple case in free_pcppages_bulk() Namhyung Kim 2011-02-10 13:10 ` Minchan Kim 2011-02-10 13:10 ` Minchan Kim 2011-02-10 13:18 ` Namhyung Kim 2011-02-10 13:18 ` Namhyung Kim 2011-02-10 13:38 ` Minchan Kim 2011-02-10 13:38 ` Minchan Kim 2011-02-10 13:53 ` Namhyung Kim 2011-02-10 13:53 ` Namhyung Kim 2011-02-10 14:05 ` Mel Gorman 2011-02-10 14:05 ` Mel Gorman
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