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authorMel Gorman <mgorman@techsingularity.net>2016-07-28 15:45:28 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2016-07-28 16:07:41 -0700
commita52633d8e9c35832f1409dc5fa166019048a3f1f (patch)
tree489be85b88b8dc0749747d603448bb3669db0d14 /mm/page_alloc.c
parent75ef7184053989118d3814c558a9af62e7376a58 (diff)
downloadlinux-a52633d8e9c35832f1409dc5fa166019048a3f1f.tar.bz2
mm, vmscan: move lru_lock to the node
Node-based reclaim requires node-based LRUs and locking. This is a preparation patch that just moves the lru_lock to the node so later patches are easier to review. It is a mechanical change but note this patch makes contention worse because the LRU lock is hotter and direct reclaim and kswapd can contend on the same lock even when reclaiming from different zones. Link: http://lkml.kernel.org/r/1467970510-21195-3-git-send-email-mgorman@techsingularity.net Signed-off-by: Mel Gorman <mgorman@techsingularity.net> Reviewed-by: Minchan Kim <minchan@kernel.org> Acked-by: Johannes Weiner <hannes@cmpxchg.org> Acked-by: Vlastimil Babka <vbabka@suse.cz> Cc: Hillf Danton <hillf.zj@alibaba-inc.com> Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com> Cc: Michal Hocko <mhocko@kernel.org> Cc: Rik van Riel <riel@surriel.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.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 7d4ff81b973f..5760c626c309 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -5904,6 +5904,7 @@ static void __paginginit free_area_init_core(struct pglist_data *pgdat)
init_waitqueue_head(&pgdat->kcompactd_wait);
#endif
pgdat_page_ext_init(pgdat);
+ spin_lock_init(&pgdat->lru_lock);
for (j = 0; j < MAX_NR_ZONES; j++) {
struct zone *zone = pgdat->node_zones + j;
@@ -5958,10 +5959,9 @@ static void __paginginit free_area_init_core(struct pglist_data *pgdat)
zone->min_slab_pages = (freesize * sysctl_min_slab_ratio) / 100;
#endif
zone->name = zone_names[j];
+ zone->zone_pgdat = pgdat;
spin_lock_init(&zone->lock);
- spin_lock_init(&zone->lru_lock);
zone_seqlock_init(zone);
- zone->zone_pgdat = pgdat;
zone_pcp_init(zone);
/* For bootup, initialized properly in watermark setup */