From: Johannes Weiner <hannes@cmpxchg.org> To: Andrew Morton <akpm@linux-foundation.org> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>, Michal Hocko <mhocko@suse.cz>, Hugh Dickins <hughd@google.com>, David Rientjes <rientjes@google.com>, linux-mm@kvack.org, cgroups@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [patch 05/11] mm: memcg: only check for PageSwapCache when uncharging anon Date: Thu, 5 Jul 2012 02:44:57 +0200 [thread overview] Message-ID: <1341449103-1986-6-git-send-email-hannes@cmpxchg.org> (raw) In-Reply-To: <1341449103-1986-1-git-send-email-hannes@cmpxchg.org> Only anon pages that are uncharged at the time of the last page table mapping vanishing may be in swapcache. When shmem pages, file pages, swap-freed anon pages, or just migrated pages are uncharged, they are known for sure to be not in swapcache. Signed-off-by: Johannes Weiner <hannes@cmpxchg.org> --- mm/memcontrol.c | 13 ++++--------- 1 files changed, 4 insertions(+), 9 deletions(-) diff --git a/mm/memcontrol.c b/mm/memcontrol.c index a3bf414..3d56b4e 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -3026,8 +3026,6 @@ void mem_cgroup_uncharge_cache_page(struct page *page) { VM_BUG_ON(page_mapped(page)); VM_BUG_ON(page->mapping); - if (PageSwapCache(page)) - return; __mem_cgroup_uncharge_common(page, MEM_CGROUP_CHARGE_TYPE_CACHE, false); } @@ -3092,8 +3090,6 @@ mem_cgroup_uncharge_swapcache(struct page *page, swp_entry_t ent, bool swapout) if (!swapout) /* this was a swap cache but the swap is unused ! */ ctype = MEM_CGROUP_CHARGE_TYPE_DROP; - if (PageSwapCache(page)) - return; memcg = __mem_cgroup_uncharge_common(page, ctype, false); /* @@ -3283,11 +3279,10 @@ void mem_cgroup_end_migration(struct mem_cgroup *memcg, unused = oldpage; } anon = PageAnon(used); - if (!PageSwapCache(page)) - __mem_cgroup_uncharge_common(unused, - anon ? MEM_CGROUP_CHARGE_TYPE_ANON - : MEM_CGROUP_CHARGE_TYPE_CACHE, - true); + __mem_cgroup_uncharge_common(unused, + anon ? MEM_CGROUP_CHARGE_TYPE_ANON + : MEM_CGROUP_CHARGE_TYPE_CACHE, + true); css_put(&memcg->css); /* * We disallowed uncharge of pages under migration because mapcount -- 1.7.7.6
WARNING: multiple messages have this Message-ID (diff)
From: Johannes Weiner <hannes@cmpxchg.org> To: Andrew Morton <akpm@linux-foundation.org> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>, Michal Hocko <mhocko@suse.cz>, Hugh Dickins <hughd@google.com>, David Rientjes <rientjes@google.com>, linux-mm@kvack.org, cgroups@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [patch 05/11] mm: memcg: only check for PageSwapCache when uncharging anon Date: Thu, 5 Jul 2012 02:44:57 +0200 [thread overview] Message-ID: <1341449103-1986-6-git-send-email-hannes@cmpxchg.org> (raw) In-Reply-To: <1341449103-1986-1-git-send-email-hannes@cmpxchg.org> Only anon pages that are uncharged at the time of the last page table mapping vanishing may be in swapcache. When shmem pages, file pages, swap-freed anon pages, or just migrated pages are uncharged, they are known for sure to be not in swapcache. Signed-off-by: Johannes Weiner <hannes@cmpxchg.org> --- mm/memcontrol.c | 13 ++++--------- 1 files changed, 4 insertions(+), 9 deletions(-) diff --git a/mm/memcontrol.c b/mm/memcontrol.c index a3bf414..3d56b4e 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -3026,8 +3026,6 @@ void mem_cgroup_uncharge_cache_page(struct page *page) { VM_BUG_ON(page_mapped(page)); VM_BUG_ON(page->mapping); - if (PageSwapCache(page)) - return; __mem_cgroup_uncharge_common(page, MEM_CGROUP_CHARGE_TYPE_CACHE, false); } @@ -3092,8 +3090,6 @@ mem_cgroup_uncharge_swapcache(struct page *page, swp_entry_t ent, bool swapout) if (!swapout) /* this was a swap cache but the swap is unused ! */ ctype = MEM_CGROUP_CHARGE_TYPE_DROP; - if (PageSwapCache(page)) - return; memcg = __mem_cgroup_uncharge_common(page, ctype, false); /* @@ -3283,11 +3279,10 @@ void mem_cgroup_end_migration(struct mem_cgroup *memcg, unused = oldpage; } anon = PageAnon(used); - if (!PageSwapCache(page)) - __mem_cgroup_uncharge_common(unused, - anon ? MEM_CGROUP_CHARGE_TYPE_ANON - : MEM_CGROUP_CHARGE_TYPE_CACHE, - true); + __mem_cgroup_uncharge_common(unused, + anon ? MEM_CGROUP_CHARGE_TYPE_ANON + : MEM_CGROUP_CHARGE_TYPE_CACHE, + true); css_put(&memcg->css); /* * We disallowed uncharge of pages under migration because mapcount -- 1.7.7.6 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@kvack.org"> email@kvack.org </a>
next prev parent reply other threads:[~2012-07-05 0:46 UTC|newest] Thread overview: 112+ messages / expand[flat|nested] mbox.gz Atom feed top 2012-07-05 0:44 [patch 00/11] mm: memcg: charge/uncharge improvements Johannes Weiner 2012-07-05 0:44 ` Johannes Weiner 2012-07-05 0:44 ` Johannes Weiner 2012-07-05 0:44 ` [patch 01/11] mm: memcg: fix compaction/migration failing due to memcg limits Johannes Weiner 2012-07-05 0:44 ` Johannes Weiner 2012-07-09 2:27 ` Kamezawa Hiroyuki 2012-07-09 2:27 ` Kamezawa Hiroyuki 2012-07-09 2:27 ` Kamezawa Hiroyuki 2012-07-09 14:15 ` Michal Hocko 2012-07-09 14:15 ` Michal Hocko 2012-07-09 14:15 ` Michal Hocko 2012-07-05 0:44 ` [patch 02/11] mm: swapfile: clean up unuse_pte race handling Johannes Weiner 2012-07-05 0:44 ` Johannes Weiner 2012-07-09 2:29 ` Kamezawa Hiroyuki 2012-07-09 2:29 ` Kamezawa Hiroyuki 2012-07-09 14:22 ` Michal Hocko 2012-07-09 14:22 ` Michal Hocko 2012-07-09 14:22 ` Michal Hocko 2012-07-05 0:44 ` [patch 03/11] mm: shmem: do not try to uncharge known swapcache pages Johannes Weiner 2012-07-05 0:44 ` Johannes Weiner 2012-07-09 2:33 ` Kamezawa Hiroyuki 2012-07-09 2:33 ` Kamezawa Hiroyuki 2012-07-09 14:46 ` Michal Hocko 2012-07-09 14:46 ` Michal Hocko 2012-07-09 20:37 ` Hugh Dickins 2012-07-09 20:37 ` Hugh Dickins 2012-07-10 17:16 ` Michal Hocko 2012-07-10 17:16 ` Michal Hocko 2012-07-10 17:16 ` Michal Hocko 2012-07-11 18:48 ` Hugh Dickins 2012-07-11 18:48 ` Hugh Dickins 2012-07-11 18:48 ` Hugh Dickins 2012-07-12 13:51 ` Michal Hocko 2012-07-12 13:51 ` Michal Hocko 2012-07-09 20:11 ` Hugh Dickins 2012-07-09 20:11 ` Hugh Dickins 2012-07-09 20:11 ` Hugh Dickins 2012-07-05 0:44 ` [patch 04/11] mm: memcg: push down PageSwapCache check into uncharge entry functions Johannes Weiner 2012-07-05 0:44 ` Johannes Weiner 2012-07-09 2:42 ` Kamezawa Hiroyuki 2012-07-09 2:42 ` Kamezawa Hiroyuki 2012-07-09 2:42 ` Kamezawa Hiroyuki 2012-07-09 7:36 ` Johannes Weiner 2012-07-09 7:36 ` Johannes Weiner 2012-07-09 7:36 ` Johannes Weiner 2012-07-09 15:02 ` Michal Hocko 2012-07-09 15:02 ` Michal Hocko 2012-07-09 15:02 ` Michal Hocko 2012-07-05 0:44 ` Johannes Weiner [this message] 2012-07-05 0:44 ` [patch 05/11] mm: memcg: only check for PageSwapCache when uncharging anon Johannes Weiner 2012-07-09 2:49 ` Kamezawa Hiroyuki 2012-07-09 2:49 ` Kamezawa Hiroyuki 2012-07-09 2:49 ` Kamezawa Hiroyuki 2012-07-09 15:05 ` Michal Hocko 2012-07-09 15:05 ` Michal Hocko 2012-07-05 0:44 ` [patch 06/11] mm: memcg: move swapin charge functions above callsites Johannes Weiner 2012-07-05 0:44 ` Johannes Weiner 2012-07-09 2:50 ` Kamezawa Hiroyuki 2012-07-09 2:50 ` Kamezawa Hiroyuki 2012-07-09 2:50 ` Kamezawa Hiroyuki 2012-07-09 15:10 ` Michal Hocko 2012-07-09 15:10 ` Michal Hocko 2012-07-05 0:44 ` [patch 07/11] mm: memcg: remove unneeded shmem charge type Johannes Weiner 2012-07-05 0:44 ` Johannes Weiner 2012-07-09 2:51 ` Kamezawa Hiroyuki 2012-07-09 2:51 ` Kamezawa Hiroyuki 2012-07-09 15:17 ` Michal Hocko 2012-07-09 15:17 ` Michal Hocko 2012-07-09 15:17 ` Michal Hocko 2012-07-05 0:45 ` [patch 08/11] mm: memcg: remove needless !mm fixup to init_mm when charging Johannes Weiner 2012-07-05 0:45 ` Johannes Weiner 2012-07-09 2:53 ` Kamezawa Hiroyuki 2012-07-09 2:53 ` Kamezawa Hiroyuki 2012-07-09 15:20 ` Michal Hocko 2012-07-09 15:20 ` Michal Hocko 2012-07-09 15:20 ` Michal Hocko 2012-07-10 6:10 ` Wanpeng Li 2012-07-10 6:10 ` Wanpeng Li 2012-07-10 6:10 ` Wanpeng Li 2012-07-10 6:21 ` Michal Hocko 2012-07-10 6:21 ` Michal Hocko 2012-07-10 6:21 ` Michal Hocko 2012-07-10 6:54 ` Wanpeng Li 2012-07-10 6:54 ` Wanpeng Li 2012-07-10 16:22 ` Michal Hocko 2012-07-10 16:22 ` Michal Hocko 2012-07-10 16:22 ` Michal Hocko 2012-07-05 0:45 ` [patch 09/11] mm: memcg: split swapin charge function into private and public part Johannes Weiner 2012-07-05 0:45 ` Johannes Weiner 2012-07-09 2:55 ` Kamezawa Hiroyuki 2012-07-09 2:55 ` Kamezawa Hiroyuki 2012-07-09 2:55 ` Kamezawa Hiroyuki 2012-07-09 15:28 ` Michal Hocko 2012-07-09 15:28 ` Michal Hocko 2012-07-09 15:28 ` Michal Hocko 2012-07-05 0:45 ` [patch 10/11] mm: memcg: only check swap cache pages for repeated charging Johannes Weiner 2012-07-05 0:45 ` Johannes Weiner 2012-07-09 3:26 ` Kamezawa Hiroyuki 2012-07-09 3:26 ` Kamezawa Hiroyuki 2012-07-09 15:32 ` Michal Hocko 2012-07-09 15:32 ` Michal Hocko 2012-07-05 0:45 ` [patch 11/11] mm: memcg: only check anon swapin page charges for swap cache Johannes Weiner 2012-07-05 0:45 ` Johannes Weiner 2012-07-09 3:44 ` Kamezawa Hiroyuki 2012-07-09 3:44 ` Kamezawa Hiroyuki 2012-07-09 3:44 ` Kamezawa Hiroyuki 2012-07-09 15:34 ` Michal Hocko 2012-07-09 15:34 ` Michal Hocko 2012-07-09 15:34 ` Michal Hocko 2012-07-09 15:35 ` [patch 00/11] mm: memcg: charge/uncharge improvements Michal Hocko 2012-07-09 15:35 ` Michal Hocko 2012-07-09 15:35 ` Michal Hocko
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