From db9adbcbe740e0986b575dd56aad834ce9e9b5d3 Mon Sep 17 00:00:00 2001 From: Johannes Weiner Date: Tue, 14 May 2019 15:47:09 -0700 Subject: mm: memcontrol: move stat/event counting functions out-of-line These are getting too big to be inlined in every callsite. They were stolen from vmstat.c, which already out-of-lines them, and they have only been growing since. The callsites aren't that hot, either. Move __mod_memcg_state() __mod_lruvec_state() and __count_memcg_events() out of line and add kerneldoc comments. Link: http://lkml.kernel.org/r/20190412151507.2769-3-hannes@cmpxchg.org Signed-off-by: Johannes Weiner Reviewed-by: Shakeel Butt Reviewed-by: Roman Gushchin Cc: Michal Hocko Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- mm/memcontrol.c | 79 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 79 insertions(+) (limited to 'mm') diff --git a/mm/memcontrol.c b/mm/memcontrol.c index 9e95bf221feb..f09ca5c498a6 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -687,6 +687,85 @@ mem_cgroup_largest_soft_limit_node(struct mem_cgroup_tree_per_node *mctz) return mz; } +/** + * __mod_memcg_state - update cgroup memory statistics + * @memcg: the memory cgroup + * @idx: the stat item - can be enum memcg_stat_item or enum node_stat_item + * @val: delta to add to the counter, can be negative + */ +void __mod_memcg_state(struct mem_cgroup *memcg, int idx, int val) +{ + long x; + + if (mem_cgroup_disabled()) + return; + + x = val + __this_cpu_read(memcg->vmstats_percpu->stat[idx]); + if (unlikely(abs(x) > MEMCG_CHARGE_BATCH)) { + atomic_long_add(x, &memcg->vmstats[idx]); + x = 0; + } + __this_cpu_write(memcg->vmstats_percpu->stat[idx], x); +} + +/** + * __mod_lruvec_state - update lruvec memory statistics + * @lruvec: the lruvec + * @idx: the stat item + * @val: delta to add to the counter, can be negative + * + * The lruvec is the intersection of the NUMA node and a cgroup. This + * function updates the all three counters that are affected by a + * change of state at this level: per-node, per-cgroup, per-lruvec. + */ +void __mod_lruvec_state(struct lruvec *lruvec, enum node_stat_item idx, + int val) +{ + struct mem_cgroup_per_node *pn; + long x; + + /* Update node */ + __mod_node_page_state(lruvec_pgdat(lruvec), idx, val); + + if (mem_cgroup_disabled()) + return; + + pn = container_of(lruvec, struct mem_cgroup_per_node, lruvec); + + /* Update memcg */ + __mod_memcg_state(pn->memcg, idx, val); + + /* Update lruvec */ + x = val + __this_cpu_read(pn->lruvec_stat_cpu->count[idx]); + if (unlikely(abs(x) > MEMCG_CHARGE_BATCH)) { + atomic_long_add(x, &pn->lruvec_stat[idx]); + x = 0; + } + __this_cpu_write(pn->lruvec_stat_cpu->count[idx], x); +} + +/** + * __count_memcg_events - account VM events in a cgroup + * @memcg: the memory cgroup + * @idx: the event item + * @count: the number of events that occured + */ +void __count_memcg_events(struct mem_cgroup *memcg, enum vm_event_item idx, + unsigned long count) +{ + unsigned long x; + + if (mem_cgroup_disabled()) + return; + + x = count + __this_cpu_read(memcg->vmstats_percpu->events[idx]); + if (unlikely(x > MEMCG_CHARGE_BATCH)) { + atomic_long_add(x, &memcg->vmevents[idx]); + x = 0; + } + __this_cpu_write(memcg->vmstats_percpu->events[idx], x); +} + static unsigned long memcg_events_local(struct mem_cgroup *memcg, int event) { -- cgit