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mm: memcontrol: clean up memory.events counting function 

We only ever count single events, drop the @nr parameter.  Rename the
function accordingly.  Remove low-information kerneldoc.

Link: http://lkml.kernel.org/r/20170404220148.28338-1-hannes@cmpxchg.org
Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Vladimir Davydov <vdavydov.dev@gmail.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Johannes Weiner 2017-05-03 14:55:07 -07:00 committed by Linus Torvalds
parent 2a2e48854d
commit 31176c7815
3 changed files with 10 additions and 18 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

18
include/linux/memcontrol.h
View File

@ -287,17 +287,10 @@ static inline bool mem_cgroup_disabled(void)
return !cgroup_subsys_enabled(memory_cgrp_subsys);
}
/**
* mem_cgroup_events - count memory events against a cgroup
* @memcg: the memory cgroup
* @idx: the event index
* @nr: the number of events to account for
*/
static inline void mem_cgroup_events(struct mem_cgroup *memcg,
enum mem_cgroup_events_index idx,
unsigned int nr)
static inline void mem_cgroup_event(struct mem_cgroup *memcg,
enum mem_cgroup_events_index idx)
{
this_cpu_add(memcg->stat->events[idx], nr);
this_cpu_inc(memcg->stat->events[idx]);
cgroup_file_notify(&memcg->events_file);
}
@ -614,9 +607,8 @@ static inline bool mem_cgroup_disabled(void)
return true;
}
static inline void mem_cgroup_events(struct mem_cgroup *memcg,
enum mem_cgroup_events_index idx,
unsigned int nr)
static inline void mem_cgroup_event(struct mem_cgroup *memcg,
enum mem_cgroup_events_index idx)
{
}

8
mm/memcontrol.c
View File

@ -1825,7 +1825,7 @@ static void reclaim_high(struct mem_cgroup *memcg,
do {
if (page_counter_read(&memcg->memory) <= memcg->high)
continue;
mem_cgroup_events(memcg, MEMCG_HIGH, 1);
mem_cgroup_event(memcg, MEMCG_HIGH);
try_to_free_mem_cgroup_pages(memcg, nr_pages, gfp_mask, true);
} while ((memcg = parent_mem_cgroup(memcg)));
}
@ -1916,7 +1916,7 @@ static int try_charge(struct mem_cgroup *memcg, gfp_t gfp_mask,
if (!gfpflags_allow_blocking(gfp_mask))
goto nomem;
mem_cgroup_events(mem_over_limit, MEMCG_MAX, 1);
mem_cgroup_event(mem_over_limit, MEMCG_MAX);
nr_reclaimed = try_to_free_mem_cgroup_pages(mem_over_limit, nr_pages,
gfp_mask, may_swap);
@ -1959,7 +1959,7 @@ static int try_charge(struct mem_cgroup *memcg, gfp_t gfp_mask,
if (fatal_signal_pending(current))
goto force;
mem_cgroup_events(mem_over_limit, MEMCG_OOM, 1);
mem_cgroup_event(mem_over_limit, MEMCG_OOM);
mem_cgroup_oom(mem_over_limit, gfp_mask,
get_order(nr_pages * PAGE_SIZE));
@ -5142,7 +5142,7 @@ static ssize_t memory_max_write(struct kernfs_open_file *of,
continue;
}
mem_cgroup_events(memcg, MEMCG_OOM, 1);
mem_cgroup_event(memcg, MEMCG_OOM);
if (!mem_cgroup_out_of_memory(memcg, GFP_KERNEL, 0))
break;
}

2
mm/vmscan.c
View File

@ -2526,7 +2526,7 @@ static bool shrink_node(pg_data_t *pgdat, struct scan_control *sc)
sc->memcg_low_skipped = 1;
continue;
}
mem_cgroup_events(memcg, MEMCG_LOW, 1);
mem_cgroup_event(memcg, MEMCG_LOW);
}
reclaimed = sc->nr_reclaimed;