diff options
| -rw-r--r-- | mm/memcontrol.c | 25 |
1 files changed, 18 insertions, 7 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c index 52840adae62..9a99cfaf0a1 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -1591,7 +1591,8 @@ bool mem_cgroup_handle_oom(struct mem_cgroup *mem, gfp_t mask) * small, we check MEM_CGROUP_ON_MOVE percpu value and detect there are * possibility of race condition. If there is, we take a lock. */ -void mem_cgroup_update_file_mapped(struct page *page, int val) + +static void mem_cgroup_update_file_stat(struct page *page, int idx, int val) { struct mem_cgroup *mem; struct page_cgroup *pc = lookup_page_cgroup(page); @@ -1613,13 +1614,18 @@ void mem_cgroup_update_file_mapped(struct page *page, int val) if (!mem || !PageCgroupUsed(pc)) goto out; } - if (val > 0) { - this_cpu_inc(mem->stat->count[MEM_CGROUP_STAT_FILE_MAPPED]); - SetPageCgroupFileMapped(pc); - } else { - this_cpu_dec(mem->stat->count[MEM_CGROUP_STAT_FILE_MAPPED]); - if (!page_mapped(page)) /* for race between dec->inc counter */ + + this_cpu_add(mem->stat->count[idx], val); + + switch (idx) { + case MEM_CGROUP_STAT_FILE_MAPPED: + if (val > 0) + SetPageCgroupFileMapped(pc); + else if (!page_mapped(page)) ClearPageCgroupFileMapped(pc); + break; + default: + BUG(); } out: @@ -1629,6 +1635,11 @@ out: return; } +void mem_cgroup_update_file_mapped(struct page *page, int val) +{ + mem_cgroup_update_file_stat(page, MEM_CGROUP_STAT_FILE_MAPPED, val); +} + /* * size of first charge trial. "32" comes from vmscan.c's magic value. * TODO: maybe necessary to use big numbers in big irons. |