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mm: add free_hot_cold_page_list() helper

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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>
This commit is contained in:
Konstantin Khlebnikov
2012-01-10 15:07:04 -08:00
committed by Linus Torvalds
parent c909e99364
commit cc59850ef9
4 changed files with 18 additions and 30 deletions
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20
mm/vmscan.c
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@ -734,24 +734,6 @@ static enum page_references page_check_references(struct page *page,
return PAGEREF_RECLAIM;
}
static noinline_for_stack void free_page_list(struct list_head *free_pages)
{
struct pagevec freed_pvec;
struct page *page, *tmp;
pagevec_init(&freed_pvec, 1);
list_for_each_entry_safe(page, tmp, free_pages, lru) {
list_del(&page->lru);
if (!pagevec_add(&freed_pvec, page)) {
__pagevec_free(&freed_pvec);
pagevec_reinit(&freed_pvec);
}
}
pagevec_free(&freed_pvec);
}
/*
* shrink_page_list() returns the number of reclaimed pages
*/
@ -1015,7 +997,7 @@ keep_lumpy:
if (nr_dirty && nr_dirty == nr_congested && scanning_global_lru(sc))
zone_set_flag(zone, ZONE_CONGESTED);
free_page_list(&free_pages);
free_hot_cold_page_list(&free_pages, 1);
list_splice(&ret_pages, page_list);
count_vm_events(PGACTIVATE, pgactivate);