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| author | Andrey Ryabinin <aryabinin@virtuozzo.com> | 2019-03-05 15:49:39 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2019-03-05 21:07:21 -0800 |
| commit | f4b7e272b5c0425915e2115068e0a5a20a3a628e (patch) | |
| tree | 7b5894a4cc657a7606aa183187392b7eae7e22bc /mm/huge_memory.c | |
| parent | a7ca12f9d905e7437dd3beb9cbb8e85bc2b991f4 (diff) | |
| download | linux-f4b7e272b5c0425915e2115068e0a5a20a3a628e.tar.bz2 | |
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/huge_memory.c')
| -rw-r--r-- | mm/huge_memory.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/mm/huge_memory.c b/mm/huge_memory.c index d4847026d4b1..fcf657886b4b 100644 --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -2440,11 +2440,11 @@ static void __split_huge_page(struct page *page, struct list_head *list, pgoff_t end, unsigned long flags) { struct page *head = compound_head(page); - struct zone *zone = page_zone(head); + pg_data_t *pgdat = page_pgdat(head); struct lruvec *lruvec; int i; - lruvec = mem_cgroup_page_lruvec(head, zone->zone_pgdat); + lruvec = mem_cgroup_page_lruvec(head, pgdat); /* complete memcg works before add pages to LRU */ mem_cgroup_split_huge_fixup(head); @@ -2475,7 +2475,7 @@ static void __split_huge_page(struct page *page, struct list_head *list, xa_unlock(&head->mapping->i_pages); } - spin_unlock_irqrestore(zone_lru_lock(page_zone(head)), flags); + spin_unlock_irqrestore(&pgdat->lru_lock, flags); remap_page(head); @@ -2686,7 +2686,7 @@ int split_huge_page_to_list(struct page *page, struct list_head *list) lru_add_drain(); /* prevent PageLRU to go away from under us, and freeze lru stats */ - spin_lock_irqsave(zone_lru_lock(page_zone(head)), flags); + spin_lock_irqsave(&pgdata->lru_lock, flags); if (mapping) { XA_STATE(xas, &mapping->i_pages, page_index(head)); @@ -2731,7 +2731,7 @@ int split_huge_page_to_list(struct page *page, struct list_head *list) spin_unlock(&pgdata->split_queue_lock); fail: if (mapping) xa_unlock(&mapping->i_pages); - spin_unlock_irqrestore(zone_lru_lock(page_zone(head)), flags); + spin_unlock_irqrestore(&pgdata->lru_lock, flags); remap_page(head); ret = -EBUSY; } |