From: Michal Hocko <mhocko@suse.cz>
To: Johannes Weiner <hannes@cmpxchg.org>
Cc: Andrew Morton <akpm@linux-foundation.org>,
KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
Hugh Dickins <hughd@google.com>,
David Rientjes <rientjes@google.com>,
linux-mm@kvack.org, cgroups@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [patch 03/11] mm: shmem: do not try to uncharge known swapcache pages
Date: Mon, 9 Jul 2012 16:46:57 +0200 [thread overview]
Message-ID: <20120709144657.GF4627@tiehlicka.suse.cz> (raw)
In-Reply-To: <1341449103-1986-4-git-send-email-hannes@cmpxchg.org>
On Thu 05-07-12 02:44:55, Johannes Weiner wrote:
> Once charged, swapcache pages can only be uncharged after they are
> removed from swapcache again.
>
> Do not try to uncharge pages that are known to be in the swapcache, to
> allow future patches to remove checks for that in the uncharge code.
>
> Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
> ---
> mm/shmem.c | 11 ++++++-----
> 1 files changed, 6 insertions(+), 5 deletions(-)
>
> diff --git a/mm/shmem.c b/mm/shmem.c
> index ee1c5a2..d12b705 100644
> --- a/mm/shmem.c
> +++ b/mm/shmem.c
> @@ -302,8 +302,6 @@ static int shmem_add_to_page_cache(struct page *page,
> if (!expected)
> radix_tree_preload_end();
> }
> - if (error)
> - mem_cgroup_uncharge_cache_page(page);
Maybe I am missing something but who does the uncharge from:
shmem_unuse
mem_cgroup_cache_charge
shmem_unuse_inode
shmem_add_to_page_cache
--
Michal Hocko
SUSE Labs
SUSE LINUX s.r.o.
Lihovarska 1060/12
190 00 Praha 9
Czech Republic
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next prev parent reply other threads:[~2012-07-09 14:47 UTC|newest]
Thread overview: 45+ 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 ` [patch 01/11] mm: memcg: fix compaction/migration failing due to memcg limits Johannes Weiner
2012-07-09 2:27 ` Kamezawa Hiroyuki
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
2012-07-09 2:29 ` Kamezawa Hiroyuki
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
2012-07-09 2:33 ` Kamezawa Hiroyuki
2012-07-09 14:46 ` Michal Hocko [this message]
2012-07-09 20:37 ` Hugh Dickins
2012-07-10 17:16 ` Michal Hocko
2012-07-11 18:48 ` Hugh Dickins
2012-07-12 13:51 ` Michal Hocko
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
2012-07-09 2:42 ` Kamezawa Hiroyuki
2012-07-09 7:36 ` Johannes Weiner
2012-07-09 15:02 ` Michal Hocko
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 15:05 ` Michal Hocko
2012-07-05 0:44 ` [patch 06/11] mm: memcg: move swapin charge functions above callsites Johannes Weiner
2012-07-09 2:50 ` Kamezawa Hiroyuki
2012-07-09 15:10 ` Michal Hocko
2012-07-05 0:44 ` [patch 07/11] mm: memcg: remove unneeded shmem charge type Johannes Weiner
2012-07-09 2:51 ` Kamezawa Hiroyuki
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
2012-07-09 2:53 ` Kamezawa Hiroyuki
2012-07-09 15:20 ` Michal Hocko
2012-07-10 6:10 ` Wanpeng Li
2012-07-10 6:21 ` Michal Hocko
2012-07-10 6:54 ` Wanpeng Li
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
2012-07-09 2:55 ` Kamezawa Hiroyuki
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
2012-07-09 3:26 ` Kamezawa Hiroyuki
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
2012-07-09 3:44 ` Kamezawa Hiroyuki
2012-07-09 15:34 ` Michal Hocko
2012-07-09 15:35 ` [patch 00/11] mm: memcg: charge/uncharge improvements Michal Hocko
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