Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758979AbZGIIMz (ORCPT ); Thu, 9 Jul 2009 04:12:55 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1758629AbZGIIMk (ORCPT ); Thu, 9 Jul 2009 04:12:40 -0400 Received: from fgwmail6.fujitsu.co.jp ([192.51.44.36]:35087 "EHLO fgwmail6.fujitsu.co.jp" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751876AbZGIIMi (ORCPT ); Thu, 9 Jul 2009 04:12:38 -0400 X-SecurityPolicyCheck-FJ: OK by FujitsuOutboundMailChecker v1.3.1 From: KOSAKI Motohiro To: LKML Subject: [PATCH 3/5][resend] Show kernel stack usage to /proc/meminfo and OOM log Cc: kosaki.motohiro@jp.fujitsu.com, linux-mm , Andrew Morton , Wu Fengguang , Christoph Lameter , David Rientjes , Rik van Riel , Hugh Dickins In-Reply-To: <20090709165820.23B7.A69D9226@jp.fujitsu.com> References: <20090709165820.23B7.A69D9226@jp.fujitsu.com> Message-Id: <20090709171122.23C3.A69D9226@jp.fujitsu.com> MIME-Version: 1.0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit X-Mailer: Becky! ver. 2.50.07 [ja] Date: Thu, 9 Jul 2009 17:12:35 +0900 (JST) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 5250 Lines: 150 Subject: [PATCH] Show kernel stack usage to /proc/meminfo and OOM log The amount of memory allocated to kernel stacks can become significant and cause OOM conditions. However, we do not display the amount of memory consumed by stacks.' Add code to display the amount of memory used for stacks in /proc/meminfo. Signed-off-by: KOSAKI Motohiro Reviewed-by: --- drivers/base/node.c | 3 +++ fs/proc/meminfo.c | 2 ++ include/linux/mmzone.h | 3 ++- kernel/fork.c | 11 +++++++++++ mm/page_alloc.c | 3 +++ mm/vmstat.c | 1 + 6 files changed, 22 insertions(+), 1 deletion(-) Index: b/fs/proc/meminfo.c =================================================================== --- a/fs/proc/meminfo.c +++ b/fs/proc/meminfo.c @@ -84,6 +84,7 @@ static int meminfo_proc_show(struct seq_ "Slab: %8lu kB\n" "SReclaimable: %8lu kB\n" "SUnreclaim: %8lu kB\n" + "KernelStack: %8lu kB\n" "PageTables: %8lu kB\n" #ifdef CONFIG_QUICKLIST "Quicklists: %8lu kB\n" @@ -128,6 +129,7 @@ static int meminfo_proc_show(struct seq_ global_page_state(NR_SLAB_UNRECLAIMABLE)), K(global_page_state(NR_SLAB_RECLAIMABLE)), K(global_page_state(NR_SLAB_UNRECLAIMABLE)), + global_page_state(NR_KERNEL_STACK) * THREAD_SIZE / 1024, K(global_page_state(NR_PAGETABLE)), #ifdef CONFIG_QUICKLIST K(quicklist_total_size()), Index: b/include/linux/mmzone.h =================================================================== --- a/include/linux/mmzone.h +++ b/include/linux/mmzone.h @@ -94,10 +94,11 @@ enum zone_stat_item { NR_SLAB_RECLAIMABLE, NR_SLAB_UNRECLAIMABLE, NR_PAGETABLE, /* used for pagetables */ + NR_KERNEL_STACK, + /* Second 128 byte cacheline */ NR_UNSTABLE_NFS, /* NFS unstable pages */ NR_BOUNCE, NR_VMSCAN_WRITE, - /* Second 128 byte cacheline */ NR_WRITEBACK_TEMP, /* Writeback using temporary buffers */ #ifdef CONFIG_NUMA NUMA_HIT, /* allocated in intended node */ Index: b/kernel/fork.c =================================================================== --- a/kernel/fork.c +++ b/kernel/fork.c @@ -137,9 +137,17 @@ struct kmem_cache *vm_area_cachep; /* SLAB cache for mm_struct structures (tsk->mm) */ static struct kmem_cache *mm_cachep; +static void account_kernel_stack(struct thread_info *ti, int account) +{ + struct zone *zone = page_zone(virt_to_page(ti)); + + mod_zone_page_state(zone, NR_KERNEL_STACK, account); +} + void free_task(struct task_struct *tsk) { prop_local_destroy_single(&tsk->dirties); + account_kernel_stack(tsk->stack, -1); free_thread_info(tsk->stack); rt_mutex_debug_task_free(tsk); ftrace_graph_exit_task(tsk); @@ -255,6 +263,9 @@ static struct task_struct *dup_task_stru tsk->btrace_seq = 0; #endif tsk->splice_pipe = NULL; + + account_kernel_stack(ti, 1); + return tsk; out: Index: b/mm/page_alloc.c =================================================================== --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -2158,6 +2158,7 @@ void show_free_areas(void) " mapped:%lukB" " slab_reclaimable:%lukB" " slab_unreclaimable:%lukB" + " kernel_stack:%lukB" " pagetables:%lukB" " unstable:%lukB" " bounce:%lukB" @@ -2182,6 +2183,8 @@ void show_free_areas(void) K(zone_page_state(zone, NR_FILE_MAPPED)), K(zone_page_state(zone, NR_SLAB_RECLAIMABLE)), K(zone_page_state(zone, NR_SLAB_UNRECLAIMABLE)), + zone_page_state(zone, NR_KERNEL_STACK) * + THREAD_SIZE / 1024, K(zone_page_state(zone, NR_PAGETABLE)), K(zone_page_state(zone, NR_UNSTABLE_NFS)), K(zone_page_state(zone, NR_BOUNCE)), Index: b/mm/vmstat.c =================================================================== --- a/mm/vmstat.c +++ b/mm/vmstat.c @@ -639,6 +639,7 @@ static const char * const vmstat_text[] "nr_slab_reclaimable", "nr_slab_unreclaimable", "nr_page_table_pages", + "nr_kernel_stack", "nr_unstable", "nr_bounce", "nr_vmscan_write", Index: b/drivers/base/node.c =================================================================== --- a/drivers/base/node.c +++ b/drivers/base/node.c @@ -85,6 +85,7 @@ static ssize_t node_read_meminfo(struct "Node %d FilePages: %8lu kB\n" "Node %d Mapped: %8lu kB\n" "Node %d AnonPages: %8lu kB\n" + "Node %d KernelStack: %8lu kB\n" "Node %d PageTables: %8lu kB\n" "Node %d NFS_Unstable: %8lu kB\n" "Node %d Bounce: %8lu kB\n" @@ -116,6 +117,8 @@ static ssize_t node_read_meminfo(struct nid, K(node_page_state(nid, NR_FILE_PAGES)), nid, K(node_page_state(nid, NR_FILE_MAPPED)), nid, K(node_page_state(nid, NR_ANON_PAGES)), + nid, node_page_state(nid, NR_KERNEL_STACK) * + THREAD_SIZE / 1024, nid, K(node_page_state(nid, NR_PAGETABLE)), nid, K(node_page_state(nid, NR_UNSTABLE_NFS)), nid, K(node_page_state(nid, NR_BOUNCE)), -- 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/