diff options
Diffstat (limited to 'mm/memcontrol.c')
| -rw-r--r-- | mm/memcontrol.c | 24 |
1 files changed, 17 insertions, 7 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c index ff7cac60298..ac8774426fe 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -261,7 +261,8 @@ unsigned long mem_cgroup_isolate_pages(unsigned long nr_to_scan, * 0 if the charge was successful * < 0 if the cgroup is over its limit */ -int mem_cgroup_charge(struct page *page, struct mm_struct *mm) +int mem_cgroup_charge(struct page *page, struct mm_struct *mm, + gfp_t gfp_mask) { struct mem_cgroup *mem; struct page_cgroup *pc, *race_pc; @@ -293,7 +294,7 @@ retry: unlock_page_cgroup(page); - pc = kzalloc(sizeof(struct page_cgroup), GFP_KERNEL); + pc = kzalloc(sizeof(struct page_cgroup), gfp_mask); if (pc == NULL) goto err; @@ -320,7 +321,14 @@ retry: * the cgroup limit. */ while (res_counter_charge(&mem->res, PAGE_SIZE)) { - if (try_to_free_mem_cgroup_pages(mem)) + bool is_atomic = gfp_mask & GFP_ATOMIC; + /* + * We cannot reclaim under GFP_ATOMIC, fail the charge + */ + if (is_atomic) + goto noreclaim; + + if (try_to_free_mem_cgroup_pages(mem, gfp_mask)) continue; /* @@ -344,9 +352,10 @@ retry: congestion_wait(WRITE, HZ/10); continue; } - +noreclaim: css_put(&mem->css); - mem_cgroup_out_of_memory(mem, GFP_KERNEL); + if (!is_atomic) + mem_cgroup_out_of_memory(mem, GFP_KERNEL); goto free_pc; } @@ -385,7 +394,8 @@ err: /* * See if the cached pages should be charged at all? */ -int mem_cgroup_cache_charge(struct page *page, struct mm_struct *mm) +int mem_cgroup_cache_charge(struct page *page, struct mm_struct *mm, + gfp_t gfp_mask) { struct mem_cgroup *mem; if (!mm) @@ -393,7 +403,7 @@ int mem_cgroup_cache_charge(struct page *page, struct mm_struct *mm) mem = rcu_dereference(mm->mem_cgroup); if (mem->control_type == MEM_CGROUP_TYPE_ALL) - return mem_cgroup_charge(page, mm); + return mem_cgroup_charge(page, mm, gfp_mask); else return 0; } |