diff options
| -rw-r--r-- | mm/memcontrol.c | 26 |
1 files changed, 15 insertions, 11 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c index 6a0007965e31..bf35bff282fc 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -366,13 +366,6 @@ mem_cgroup_zone_zoneinfo(struct mem_cgroup *memcg, struct zone *zone) * * If memcg is bound to a traditional hierarchy, the css of root_mem_cgroup * is returned. - * - * XXX: The above description of behavior on the default hierarchy isn't - * strictly true yet as replace_page_cache_page() can modify the - * association before @page is released even on the default hierarchy; - * however, the current and planned usages don't mix the the two functions - * and replace_page_cache_page() will soon be updated to make the invariant - * actually true. */ struct cgroup_subsys_state *mem_cgroup_css_from_page(struct page *page) { @@ -5464,7 +5457,8 @@ void mem_cgroup_uncharge_list(struct list_head *page_list) void mem_cgroup_replace_page(struct page *oldpage, struct page *newpage) { struct mem_cgroup *memcg; - int isolated; + unsigned int nr_pages; + bool compound; VM_BUG_ON_PAGE(!PageLocked(oldpage), oldpage); VM_BUG_ON_PAGE(!PageLocked(newpage), newpage); @@ -5484,11 +5478,21 @@ void mem_cgroup_replace_page(struct page *oldpage, struct page *newpage) if (!memcg) return; - lock_page_lru(oldpage, &isolated); - oldpage->mem_cgroup = NULL; - unlock_page_lru(oldpage, isolated); + /* Force-charge the new page. The old one will be freed soon */ + compound = PageTransHuge(newpage); + nr_pages = compound ? hpage_nr_pages(newpage) : 1; + + page_counter_charge(&memcg->memory, nr_pages); + if (do_memsw_account()) + page_counter_charge(&memcg->memsw, nr_pages); + css_get_many(&memcg->css, nr_pages); commit_charge(newpage, memcg, true); + + local_irq_disable(); + mem_cgroup_charge_statistics(memcg, newpage, compound, nr_pages); + memcg_check_events(memcg, newpage); + local_irq_enable(); } DEFINE_STATIC_KEY_FALSE(memcg_sockets_enabled_key); |