diff options
Diffstat (limited to 'mm/memcontrol.c')
| -rw-r--r-- | mm/memcontrol.c | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c index 3a2d54b..0356cb6 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -3046,6 +3046,52 @@ int mem_cgroup_shmem_charge_fallback(struct page *page, return ret; } +#ifdef CONFIG_DEBUG_VM +static struct page_cgroup *lookup_page_cgroup_used(struct page *page) +{ + struct page_cgroup *pc; + + pc = lookup_page_cgroup(page); + if (likely(pc) && PageCgroupUsed(pc)) + return pc; + return NULL; +} + +bool mem_cgroup_bad_page_check(struct page *page) +{ + if (mem_cgroup_disabled()) + return false; + + return lookup_page_cgroup_used(page) != NULL; +} + +void mem_cgroup_print_bad_page(struct page *page) +{ + struct page_cgroup *pc; + + pc = lookup_page_cgroup_used(page); + if (pc) { + int ret = -1; + char *path; + + printk(KERN_ALERT "pc:%p pc->flags:%lx pc->mem_cgroup:%p", + pc, pc->flags, pc->mem_cgroup); + + path = kmalloc(PATH_MAX, GFP_KERNEL); + if (path) { + rcu_read_lock(); + ret = cgroup_path(pc->mem_cgroup->css.cgroup, + path, PATH_MAX); + rcu_read_unlock(); + } + + printk(KERN_CONT "(%s)\n", + (ret < 0) ? "cannot get the path" : path); + kfree(path); + } +} +#endif + static DEFINE_MUTEX(set_limit_mutex); static int mem_cgroup_resize_limit(struct mem_cgroup *memcg, |