mem_cgroup_enough_memory() iterates memcg's subtree to account 'MEM_CGROUP_STAT_CACHE - MEM_CGROUP_STAT_SHMEM'.
Fortunately we can just read memcg->cache counter instead as it's hierarchical (includes subgroups) and doesn't account shmem. https://jira.sw.ru/browse/PSBM-120968 Signed-off-by: Andrey Ryabinin <aryabi...@virtuozzo.com> --- mm/memcontrol.c | 6 +----- 1 file changed, 1 insertion(+), 5 deletions(-) diff --git a/mm/memcontrol.c b/mm/memcontrol.c index 6587cc2ef019..e36ad592b3c7 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -4721,11 +4721,7 @@ int mem_cgroup_enough_memory(struct mem_cgroup *memcg, long pages) free += page_counter_read(&memcg->dcache); /* assume file cache is reclaimable */ - free += mem_cgroup_recursive_stat2(memcg, MEM_CGROUP_STAT_CACHE); - - /* but do not count shmem pages as they can't be purged, - * only swapped out */ - free -= mem_cgroup_recursive_stat(memcg, MEM_CGROUP_STAT_SHMEM); + free += page_counter_read(&memcg->cache); return free < pages ? -ENOMEM : 0; } -- 2.26.2 _______________________________________________ Devel mailing list Devel@openvz.org https://lists.openvz.org/mailman/listinfo/devel
