Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756258AbZGIISS (ORCPT ); Thu, 9 Jul 2009 04:18:18 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755206AbZGIISH (ORCPT ); Thu, 9 Jul 2009 04:18:07 -0400 Received: from fgwmail6.fujitsu.co.jp ([192.51.44.36]:35364 "EHLO fgwmail6.fujitsu.co.jp" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752754AbZGIISF (ORCPT ); Thu, 9 Jul 2009 04:18:05 -0400 X-SecurityPolicyCheck-FJ: OK by FujitsuOutboundMailChecker v1.3.1 From: KOSAKI Motohiro To: LKML Subject: [PATCH 5/5] add shmem vmstat 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: <20090709171452.23C9.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 17:18:01 +0900 (JST) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 6320 Lines: 175 ChangeLog Since v1 - Fixed misaccounting bug on page migration ======================== Subject: [PATCH] add shmem vmstat Recently, We faced several OOM problem by plenty GEM cache. and generally, plenty Shmem/Tmpfs potentially makes memory shortage problem. We often use following calculation to know shmem pages, shmem = NR_ACTIVE_ANON + NR_INACTIVE_ANON - NR_ANON_PAGES but it is wrong expression. it doesn't consider isolated page and mlocked page. Then, This patch make explicit Shmem/Tmpfs vm-stat accounting. Signed-off-by: KOSAKI Motohiro --- drivers/base/node.c | 2 ++ fs/proc/meminfo.c | 2 ++ include/linux/mmzone.h | 1 + mm/filemap.c | 4 ++++ mm/migrate.c | 4 ++++ mm/page_alloc.c | 5 ++++- mm/vmstat.c | 1 + 7 files changed, 18 insertions(+), 1 deletion(-) Index: b/drivers/base/node.c =================================================================== --- a/drivers/base/node.c +++ b/drivers/base/node.c @@ -87,6 +87,7 @@ 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 Shmem: %8lu kB\n" "Node %d KernelStack: %8lu kB\n" "Node %d PageTables: %8lu kB\n" "Node %d NFS_Unstable: %8lu kB\n" @@ -121,6 +122,7 @@ 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, K(node_page_state(nid, NR_SHMEM)), nid, node_page_state(nid, NR_KERNEL_STACK) * THREAD_SIZE / 1024, nid, K(node_page_state(nid, NR_PAGETABLE)), Index: b/fs/proc/meminfo.c =================================================================== --- a/fs/proc/meminfo.c +++ b/fs/proc/meminfo.c @@ -83,6 +83,7 @@ static int meminfo_proc_show(struct seq_ "Writeback: %8lu kB\n" "AnonPages: %8lu kB\n" "Mapped: %8lu kB\n" + "Shmem: %8lu kB\n" "Slab: %8lu kB\n" "SReclaimable: %8lu kB\n" "SUnreclaim: %8lu kB\n" @@ -129,6 +130,7 @@ static int meminfo_proc_show(struct seq_ K(global_page_state(NR_WRITEBACK)), K(global_page_state(NR_ANON_PAGES)), K(global_page_state(NR_FILE_MAPPED)), + K(global_page_state(NR_SHMEM)), K(global_page_state(NR_SLAB_RECLAIMABLE) + global_page_state(NR_SLAB_UNRECLAIMABLE)), K(global_page_state(NR_SLAB_RECLAIMABLE)), Index: b/include/linux/mmzone.h =================================================================== --- a/include/linux/mmzone.h +++ b/include/linux/mmzone.h @@ -102,6 +102,7 @@ enum zone_stat_item { NR_WRITEBACK_TEMP, /* Writeback using temporary buffers */ NR_ISOLATED_ANON, /* Temporary isolated pages from anon lru */ NR_ISOLATED_FILE, /* Temporary isolated pages from file lru */ + NR_SHMEM, /* shmem pages (included tmpfs/GEM pages) */ #ifdef CONFIG_NUMA NUMA_HIT, /* allocated in intended node */ NUMA_MISS, /* allocated in non intended node */ Index: b/mm/filemap.c =================================================================== --- a/mm/filemap.c +++ b/mm/filemap.c @@ -120,6 +120,8 @@ void __remove_from_page_cache(struct pag page->mapping = NULL; mapping->nrpages--; __dec_zone_page_state(page, NR_FILE_PAGES); + if (PageSwapBacked(page)) + __dec_zone_page_state(page, NR_SHMEM); BUG_ON(page_mapped(page)); /* @@ -476,6 +478,8 @@ int add_to_page_cache_locked(struct page if (likely(!error)) { mapping->nrpages++; __inc_zone_page_state(page, NR_FILE_PAGES); + if (PageSwapBacked(page)) + __inc_zone_page_state(page, NR_SHMEM); spin_unlock_irq(&mapping->tree_lock); } else { page->mapping = NULL; Index: b/mm/vmstat.c =================================================================== --- a/mm/vmstat.c +++ b/mm/vmstat.c @@ -646,6 +646,7 @@ static const char * const vmstat_text[] "nr_writeback_temp", "nr_isolated_anon", "nr_isolated_file", + "nr_shmem", #ifdef CONFIG_NUMA "numa_hit", "numa_miss", Index: b/mm/page_alloc.c =================================================================== --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -2120,7 +2120,7 @@ void show_free_areas(void) " unevictable:%lu\n" " dirty:%lu writeback:%lu unstable:%lu buffer:%lu\n" " free:%lu slab_reclaimable:%lu slab_unreclaimable:%lu\n" - " mapped:%lu pagetables:%lu bounce:%lu\n", + " mapped:%lu shmem:%lu pagetables:%lu bounce:%lu\n", global_page_state(NR_ACTIVE_ANON), global_page_state(NR_INACTIVE_ANON), global_page_state(NR_ISOLATED_ANON), @@ -2136,6 +2136,7 @@ void show_free_areas(void) global_page_state(NR_SLAB_RECLAIMABLE), global_page_state(NR_SLAB_UNRECLAIMABLE), global_page_state(NR_FILE_MAPPED), + global_page_state(NR_SHMEM), global_page_state(NR_PAGETABLE), global_page_state(NR_BOUNCE)); @@ -2160,6 +2161,7 @@ void show_free_areas(void) " dirty:%lukB" " writeback:%lukB" " mapped:%lukB" + " shmem:%lukB" " slab_reclaimable:%lukB" " slab_unreclaimable:%lukB" " kernel_stack:%lukB" @@ -2187,6 +2189,7 @@ void show_free_areas(void) K(zone_page_state(zone, NR_FILE_DIRTY)), K(zone_page_state(zone, NR_WRITEBACK)), K(zone_page_state(zone, NR_FILE_MAPPED)), + K(zone_page_state(zone, NR_SHMEM)), K(zone_page_state(zone, NR_SLAB_RECLAIMABLE)), K(zone_page_state(zone, NR_SLAB_UNRECLAIMABLE)), zone_page_state(zone, NR_KERNEL_STACK) * Index: b/mm/migrate.c =================================================================== --- a/mm/migrate.c +++ b/mm/migrate.c @@ -312,7 +312,11 @@ static int migrate_page_move_mapping(str */ __dec_zone_page_state(page, NR_FILE_PAGES); __inc_zone_page_state(newpage, NR_FILE_PAGES); + if (PageSwapBacked(page)) { + __dec_zone_page_state(page, NR_SHMEM); + __inc_zone_page_state(newpage, NR_SHMEM); + } spin_unlock_irq(&mapping->tree_lock); return 0; -- 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/