Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752842Ab2KGIln (ORCPT ); Wed, 7 Nov 2012 03:41:43 -0500 Received: from mail-pb0-f46.google.com ([209.85.160.46]:45791 "EHLO mail-pb0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750996Ab2KGIll (ORCPT ); Wed, 7 Nov 2012 03:41:41 -0500 From: Sha Zhengju To: linux-mm@kvack.org, cgroups@vger.kernel.org, mhocko@suse.cz, kamezawa.hiroyu@jp.fujitsu.com, akpm@linux-foundation.org, rientjes@google.com Cc: linux-kernel@vger.kernel.org, Sha Zhengju Subject: [PATCH 1/2] memcg, oom: provide more precise dump info while memcg oom happening Date: Wed, 7 Nov 2012 16:41:36 +0800 Message-Id: <1352277696-21724-1-git-send-email-handai.szj@taobao.com> X-Mailer: git-send-email 1.7.4.1 In-Reply-To: <1352277602-21687-1-git-send-email-handai.szj@taobao.com> References: <1352277602-21687-1-git-send-email-handai.szj@taobao.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 4480 Lines: 145 From: Sha Zhengju Current, when a memcg oom is happening the oom dump messages is still global state and provides few useful info for users. This patch prints more pointed memcg page statistics for memcg-oom. Signed-off-by: Sha Zhengju Cc: Michal Hocko Cc: KAMEZAWA Hiroyuki Cc: David Rientjes Cc: Andrew Morton --- mm/memcontrol.c | 71 ++++++++++++++++++++++++++++++++++++++++++++++++------- mm/oom_kill.c | 6 +++- 2 files changed, 66 insertions(+), 11 deletions(-) diff --git a/mm/memcontrol.c b/mm/memcontrol.c index 0eab7d5..2df5e72 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -118,6 +118,14 @@ static const char * const mem_cgroup_events_names[] = { "pgmajfault", }; +static const char * const mem_cgroup_lru_names[] = { + "inactive_anon", + "active_anon", + "inactive_file", + "active_file", + "unevictable", +}; + /* * Per memcg event counter is incremented at every pagein/pageout. With THP, * it will be incremated by the number of pages. This counter is used for @@ -1501,8 +1509,59 @@ static void move_unlock_mem_cgroup(struct mem_cgroup *memcg, spin_unlock_irqrestore(&memcg->move_lock, *flags); } +#define K(x) ((x) << (PAGE_SHIFT-10)) +static void mem_cgroup_print_oom_stat(struct mem_cgroup *memcg) +{ + struct mem_cgroup *mi; + unsigned int i; + + if (!memcg->use_hierarchy && memcg != root_mem_cgroup) { + for (i = 0; i < MEM_CGROUP_STAT_NSTATS; i++) { + if (i == MEM_CGROUP_STAT_SWAP && !do_swap_account) + continue; + printk(KERN_CONT "%s:%ldKB ", mem_cgroup_stat_names[i], + K(mem_cgroup_read_stat(memcg, i))); + } + + for (i = 0; i < MEM_CGROUP_EVENTS_NSTATS; i++) + printk(KERN_CONT "%s:%lu ", mem_cgroup_events_names[i], + mem_cgroup_read_events(memcg, i)); + + for (i = 0; i < NR_LRU_LISTS; i++) + printk(KERN_CONT "%s:%luKB ", mem_cgroup_lru_names[i], + K(mem_cgroup_nr_lru_pages(memcg, BIT(i)))); + } else { + + for (i = 0; i < MEM_CGROUP_STAT_NSTATS; i++) { + long long val = 0; + + if (i == MEM_CGROUP_STAT_SWAP && !do_swap_account) + continue; + for_each_mem_cgroup_tree(mi, memcg) + val += mem_cgroup_read_stat(mi, i); + printk(KERN_CONT "%s:%lldKB ", mem_cgroup_stat_names[i], K(val)); + } + + for (i = 0; i < MEM_CGROUP_EVENTS_NSTATS; i++) { + unsigned long long val = 0; + + for_each_mem_cgroup_tree(mi, memcg) + val += mem_cgroup_read_events(mi, i); + printk(KERN_CONT "%s:%llu ", + mem_cgroup_events_names[i], val); + } + + for (i = 0; i < NR_LRU_LISTS; i++) { + unsigned long long val = 0; + + for_each_mem_cgroup_tree(mi, memcg) + val += mem_cgroup_nr_lru_pages(mi, BIT(i)); + printk(KERN_CONT "%s:%lluKB ", mem_cgroup_lru_names[i], K(val)); + } + } + printk(KERN_CONT "\n"); +} /** - * mem_cgroup_print_oom_info: Called from OOM with tasklist_lock held in read mode. * @memcg: The memory cgroup that went over limit * @p: Task that is going to be killed * @@ -1569,6 +1628,8 @@ done: res_counter_read_u64(&memcg->kmem, RES_USAGE) >> 10, res_counter_read_u64(&memcg->kmem, RES_LIMIT) >> 10, res_counter_read_u64(&memcg->kmem, RES_FAILCNT)); + + mem_cgroup_print_oom_stat(memcg); } /* @@ -5195,14 +5256,6 @@ static int memcg_numa_stat_show(struct cgroup *cont, struct cftype *cft, } #endif /* CONFIG_NUMA */ -static const char * const mem_cgroup_lru_names[] = { - "inactive_anon", - "active_anon", - "inactive_file", - "active_file", - "unevictable", -}; - static inline void mem_cgroup_lru_names_not_uptodate(void) { BUILD_BUG_ON(ARRAY_SIZE(mem_cgroup_lru_names) != NR_LRU_LISTS); diff --git a/mm/oom_kill.c b/mm/oom_kill.c index 7e9e911..4b8a6dd 100644 --- a/mm/oom_kill.c +++ b/mm/oom_kill.c @@ -421,8 +421,10 @@ static void dump_header(struct task_struct *p, gfp_t gfp_mask, int order, cpuset_print_task_mems_allowed(current); task_unlock(current); dump_stack(); - mem_cgroup_print_oom_info(memcg, p); - show_mem(SHOW_MEM_FILTER_NODES); + if (memcg) + mem_cgroup_print_oom_info(memcg, p); + else + show_mem(SHOW_MEM_FILTER_NODES); if (sysctl_oom_dump_tasks) dump_tasks(memcg, nodemask); } -- 1.7.6.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/