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authorKonstantin Khlebnikov <khlebnikov@openvz.org>2012-01-10 15:07:04 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2012-01-10 16:30:41 -0800
commitcc59850ef940e4ee6a765d28b439b9bafe07cf63 (patch)
tree03b666986e9cc7dfc113a14721c44aa9e149f871 /mm/page_alloc.c
parentc909e99364c8b6ca07864d752950b6b4ecf6bef4 (diff)
downloadlinux-cc59850ef940e4ee6a765d28b439b9bafe07cf63.tar.bz2
mm: add free_hot_cold_page_list() helper
This patch adds helper free_hot_cold_page_list() to free list of 0-order pages. It frees pages directly from list without temporary page-vector. It also calls trace_mm_pagevec_free() to simulate pagevec_free() behaviour. bloat-o-meter: add/remove: 1/1 grow/shrink: 1/3 up/down: 267/-295 (-28) function old new delta free_hot_cold_page_list - 264 +264 get_page_from_freelist 2129 2132 +3 __pagevec_free 243 239 -4 split_free_page 380 373 -7 release_pages 606 510 -96 free_page_list 188 - -188 Signed-off-by: Konstantin Khlebnikov <khlebnikov@openvz.org> Cc: Mel Gorman <mel@csn.ul.ie> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Acked-by: Minchan Kim <minchan.kim@gmail.com> Acked-by: Hugh Dickins <hughd@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/page_alloc.c')
-rw-r--r--mm/page_alloc.c13
1 files changed, 13 insertions, 0 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 7990ca154d1b..cd0c95c6cc9e 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -1189,6 +1189,19 @@ out:
}
/*
+ * Free a list of 0-order pages
+ */
+void free_hot_cold_page_list(struct list_head *list, int cold)
+{
+ struct page *page, *next;
+
+ list_for_each_entry_safe(page, next, list, lru) {
+ trace_mm_pagevec_free(page, cold);
+ free_hot_cold_page(page, cold);
+ }
+}
+
+/*
* split_page takes a non-compound higher-order page, and splits it into
* n (1<<order) sub-pages: page[0..n]
* Each sub-page must be freed individually.