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mm/memcg: apply add/del_page to lruvec

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Take lruvec further: pass it instead of zone to add_page_to_lru_list() and
del_page_from_lru_list(); and pagevec_lru_move_fn() pass lruvec down to
its target functions.

This cleanup eliminates a swathe of cruft in memcontrol.c, including
mem_cgroup_lru_add_list(), mem_cgroup_lru_del_list() and
mem_cgroup_lru_move_lists() - which never actually touched the lists.

In their place, mem_cgroup_page_lruvec() to decide the lruvec, previously
a side-effect of add, and mem_cgroup_update_lru_size() to maintain the
lru_size stats.

Whilst these are simplifications in their own right, the goal is to bring
the evaluation of lruvec next to the spin_locking of the lrus, in
preparation for a future patch.

Signed-off-by: Hugh Dickins <[email protected]>
Cc: KOSAKI Motohiro <[email protected]>
Acked-by: KAMEZAWA Hiroyuki <[email protected]>
Acked-by: Michal Hocko <[email protected]>
Acked-by: Konstantin Khlebnikov <[email protected]>
Cc: Johannes Weiner <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Hugh Dickins 2012-05-29 15:07:09 -07:00 • committed by Linus Torvalds
commit fa9add641b
8 changed files with 122 additions and 181 deletions
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5
mm/compaction.c
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@ -227,6 +227,7 @@ isolate_migratepages_range(struct zone *zone, struct compact_control *cc,
unsigned long nr_scanned = 0, nr_isolated = 0;
struct list_head *migratelist = &cc->migratepages;
isolate_mode_t mode = 0;
struct lruvec *lruvec;
/*
* Ensure that there are not too many pages isolated from the LRU
@ -328,6 +329,8 @@ isolate_migratepages_range(struct zone *zone, struct compact_control *cc,
if (cc->mode != COMPACT_SYNC)
mode |= ISOLATE_ASYNC_MIGRATE;
lruvec = mem_cgroup_page_lruvec(page, zone);
/* Try isolate the page */
if (__isolate_lru_page(page, mode) != 0)
continue;
@ -335,7 +338,7 @@ isolate_migratepages_range(struct zone *zone, struct compact_control *cc,
VM_BUG_ON(PageTransCompound(page));
/* Successfully isolated */
del_page_from_lru_list(zone, page, page_lru(page));
del_page_from_lru_list(page, lruvec, page_lru(page));
list_add(&page->lru, migratelist);
cc->nr_migratepages++;
nr_isolated++;