{
struct mem_cgroup *old = stock->cached;
+ if (!old)
+ return;
+
if (stock->nr_pages) {
page_counter_uncharge(&old->memory, stock->nr_pages);
if (do_memsw_account())
page_counter_uncharge(&old->memsw, stock->nr_pages);
- css_put_many(&old->css, stock->nr_pages);
stock->nr_pages = 0;
}
+
+ css_put(&old->css);
stock->cached = NULL;
}
stock = this_cpu_ptr(&memcg_stock);
if (stock->cached != memcg) { /* reset if necessary */
drain_stock(stock);
+ css_get(&memcg->css);
stock->cached = memcg;
}
stock->nr_pages += nr_pages;
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);
return 0;
done_restock:
- css_get_many(&memcg->css, batch);
if (batch > nr_pages)
refill_stock(memcg, batch - nr_pages);
page_counter_uncharge(&memcg->memory, nr_pages);
if (do_memsw_account())
page_counter_uncharge(&memcg->memsw, nr_pages);
-
- css_put_many(&memcg->css, nr_pages);
}
#endif
if (!ret) {
page->mem_cgroup = memcg;
__SetPageKmemcg(page);
+ return 0;
}
}
css_put(&memcg->css);
VM_BUG_ON_PAGE(mem_cgroup_is_root(memcg), page);
__memcg_kmem_uncharge(memcg, nr_pages);
page->mem_cgroup = NULL;
+ css_put(&memcg->css);
/* slab pages do not have PageKmemcg flag set */
if (PageKmemcg(page))
__ClearPageKmemcg(page);
-
- css_put_many(&memcg->css, nr_pages);
}
#endif /* CONFIG_MEMCG_KMEM */
*/
void mem_cgroup_split_huge_fixup(struct page *head)
{
+ struct mem_cgroup *memcg = head->mem_cgroup;
int i;
if (mem_cgroup_disabled())
return;
- for (i = 1; i < HPAGE_PMD_NR; i++)
- head[i].mem_cgroup = head->mem_cgroup;
+ for (i = 1; i < HPAGE_PMD_NR; i++) {
+ css_get(&memcg->css);
+ head[i].mem_cgroup = memcg;
+ }
}
#endif /* CONFIG_TRANSPARENT_HUGEPAGE */
*/
smp_mb();
- page->mem_cgroup = to; /* caller should have done css_get */
+ css_get(&to->css);
+ css_put(&from->css);
+
+ page->mem_cgroup = to;
__unlock_page_memcg(from);
if (!mem_cgroup_is_root(mc.to))
page_counter_uncharge(&mc.to->memory, mc.moved_swap);
- css_put_many(&mc.to->css, mc.moved_swap);
-
mc.moved_swap = 0;
}
memcg_oom_recover(from);
if (ret)
goto out_put;
+ css_get(&memcg->css);
commit_charge(page, memcg);
local_irq_disable();
__this_cpu_add(ug->memcg->vmstats_percpu->nr_page_events, ug->nr_pages);
memcg_check_events(ug->memcg, ug->dummy_page);
local_irq_restore(flags);
-
- if (!mem_cgroup_is_root(ug->memcg))
- css_put_many(&ug->memcg->css, ug->nr_pages);
}
static void uncharge_page(struct page *page, struct uncharge_gather *ug)
ug->dummy_page = page;
page->mem_cgroup = NULL;
+ css_put(&ug->memcg->css);
}
static void uncharge_list(struct list_head *page_list)
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);
+ css_get(&memcg->css);
commit_charge(newpage, memcg);
local_irq_save(flags);
mem_cgroup_charge_statistics(memcg, page, -nr_entries);
memcg_check_events(memcg, page);
- if (!mem_cgroup_is_root(memcg))
- css_put_many(&memcg->css, nr_entries);
+ css_put(&memcg->css);
}
/**