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| author | Andrey Ryabinin <aryabinin@virtuozzo.com> | 2019-03-06 02:49:39 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2019-03-06 08:07:21 +0300 |
| commit | f4b7e272b5c0425915e2115068e0a5a20a3a628e (patch) | |
| tree | 7b5894a4cc657a7606aa183187392b7eae7e22bc /mm/memcontrol.c | |
| parent | a7ca12f9d905e7437dd3beb9cbb8e85bc2b991f4 (diff) | |
| download | linux-f4b7e272b5c0425915e2115068e0a5a20a3a628e.tar.xz | |
mm: remove zone_lru_lock() function, access ->lru_lock directly
We have common pattern to access lru_lock from a page pointer:
zone_lru_lock(page_zone(page))
Which is silly, because it unfolds to this:
&NODE_DATA(page_to_nid(page))->node_zones[page_zonenum(page)]->zone_pgdat->lru_lock
while we can simply do
&NODE_DATA(page_to_nid(page))->lru_lock
Remove zone_lru_lock() function, since it's only complicate things. Use
'page_pgdat(page)->lru_lock' pattern instead.
[aryabinin@virtuozzo.com: a slightly better version of __split_huge_page()]
Link: http://lkml.kernel.org/r/20190301121651.7741-1-aryabinin@virtuozzo.com
Link: http://lkml.kernel.org/r/20190228083329.31892-2-aryabinin@virtuozzo.com
Signed-off-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Acked-by: Mel Gorman <mgorman@techsingularity.net>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Rik van Riel <riel@surriel.com>
Cc: William Kucharski <william.kucharski@oracle.com>
Cc: John Hubbard <jhubbard@nvidia.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/memcontrol.c')
| -rw-r--r-- | mm/memcontrol.c | 14 |
1 files changed, 7 insertions, 7 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c index 45cd1f84268a..7160cfab8107 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -2362,13 +2362,13 @@ static void cancel_charge(struct mem_cgroup *memcg, unsigned int nr_pages) static void lock_page_lru(struct page *page, int *isolated) { - struct zone *zone = page_zone(page); + pg_data_t *pgdat = page_pgdat(page); - spin_lock_irq(zone_lru_lock(zone)); + spin_lock_irq(&pgdat->lru_lock); if (PageLRU(page)) { struct lruvec *lruvec; - lruvec = mem_cgroup_page_lruvec(page, zone->zone_pgdat); + lruvec = mem_cgroup_page_lruvec(page, pgdat); ClearPageLRU(page); del_page_from_lru_list(page, lruvec, page_lru(page)); *isolated = 1; @@ -2378,17 +2378,17 @@ static void lock_page_lru(struct page *page, int *isolated) static void unlock_page_lru(struct page *page, int isolated) { - struct zone *zone = page_zone(page); + pg_data_t *pgdat = page_pgdat(page); if (isolated) { struct lruvec *lruvec; - lruvec = mem_cgroup_page_lruvec(page, zone->zone_pgdat); + lruvec = mem_cgroup_page_lruvec(page, pgdat); VM_BUG_ON_PAGE(PageLRU(page), page); SetPageLRU(page); add_page_to_lru_list(page, lruvec, page_lru(page)); } - spin_unlock_irq(zone_lru_lock(zone)); + spin_unlock_irq(&pgdat->lru_lock); } static void commit_charge(struct page *page, struct mem_cgroup *memcg, @@ -2674,7 +2674,7 @@ void __memcg_kmem_uncharge(struct page *page, int order) /* * Because tail pages are not marked as "used", set it. We're under - * zone_lru_lock and migration entries setup in all page mappings. + * pgdat->lru_lock and migration entries setup in all page mappings. */ void mem_cgroup_split_huge_fixup(struct page *head) { |