Exceeding cache above cache.limit_in_bytes schedules high_work_func() which tries to reclaim 32 pages. If cache generated fast enough or it allows cgroup to steadily grow above cache.limit_in_bytes because we don't reclaim enough. Try to reclaim exceeded amount of cache instead.
https://jira.sw.ru/browse/PSBM-106384 Signed-off-by: Andrey Ryabinin <aryabi...@virtuozzo.com> --- mm/memcontrol.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/mm/memcontrol.c b/mm/memcontrol.c index c30150b8732d..37d4df653f39 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -2213,14 +2213,18 @@ static void reclaim_high(struct mem_cgroup *memcg, { do { + long cache_overused; if (page_counter_read(&memcg->memory) > memcg->high) { memcg_memory_event(memcg, MEMCG_HIGH); try_to_free_mem_cgroup_pages(memcg, nr_pages, gfp_mask, true); } - if (page_counter_read(&memcg->cache) > memcg->cache.max) - try_to_free_mem_cgroup_pages(memcg, nr_pages, gfp_mask, false); + cache_overused = page_counter_read(&memcg->cache) - + memcg->cache.max; + + if (cache_overused > 0) + try_to_free_mem_cgroup_pages(memcg, cache_overused, gfp_mask, false); } while ((memcg = parent_mem_cgroup(memcg))); } -- 2.26.2 _______________________________________________ Devel mailing list Devel@openvz.org https://lists.openvz.org/mailman/listinfo/devel
