From: Li Zefan <lizf@cn.fujitsu.com>
To: Wu Fengguang <fengguang.wu@intel.com>
Cc: Andi Kleen <andi@firstfloor.org>,
Andrew Morton <akpm@linux-foundation.org>,
KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
Hugh Dickins <hugh.dickins@tiscali.co.uk>,
Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp>,
Balbir Singh <balbir@linux.vnet.ibm.com>,
KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
Paul Menage <menage@google.com>, Nick Piggin <npiggin@suse.de>,
"linux-mm@kvack.org" <linux-mm@kvack.org>,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 22/24] HWPOISON: add memory cgroup filter
Date: Thu, 03 Dec 2009 10:15:17 +0800 [thread overview]
Message-ID: <4B171F35.1010908@cn.fujitsu.com> (raw)
In-Reply-To: <20091202125842.GA13277@localhost>
> +#ifdef CONFIG_CGROUP_MEM_RES_CTLR_SWAP
> +u32 hwpoison_filter_memcg;
> +static int hwpoison_filter_task(struct page *p)
> +{
> + struct mem_cgroup *mem;
> + struct cgroup_subsys_state *css;
> +
> + if (!hwpoison_filter_memcg)
> + return 0;
> +
> + mem = try_get_mem_cgroup_from_page(p);
> + if (!mem)
> + return -EINVAL;
> +
> + css = mem_cgroup_css(mem);
> + if (!css)
> + return -EINVAL;
> +
Here, if mem != NULL, then css won't be NULL.
> + css_put(css);
> + return 0;
> +}
--
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next prev parent reply other threads:[~2009-12-03 2:15 UTC|newest]
Thread overview: 61+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-12-02 3:12 [PATCH 00/24] hwpoison fixes and stress testing filters Wu Fengguang
2009-12-02 3:12 ` [PATCH 01/24] page-types: add standard GPL license head Wu Fengguang
2009-12-02 13:08 ` Andi Kleen
2009-12-02 3:12 ` [PATCH 02/24] migrate: page could be locked by hwpoison, dont BUG() Wu Fengguang
2009-12-02 13:09 ` Andi Kleen
2009-12-02 14:50 ` Christoph Lameter
2009-12-03 1:34 ` Wu Fengguang
2009-12-02 3:12 ` [PATCH 03/24] HWPOISON: remove the anonymous entry Wu Fengguang
2009-12-02 3:12 ` [PATCH 04/24] HWPOISON: return ENXIO on invalid pfn Wu Fengguang
2009-12-02 3:12 ` [PATCH 05/24] HWPOISON: avoid grabbing page for two times Wu Fengguang
2009-12-02 3:12 ` [PATCH 06/24] HWPOISON: abort on failed unmap Wu Fengguang
2009-12-02 13:11 ` Andi Kleen
2009-12-02 13:28 ` Wu Fengguang
2009-12-02 13:44 ` Andi Kleen
2009-12-02 3:12 ` [PATCH 07/24] HWPOISON: comment the possible set_page_dirty() race Wu Fengguang
2009-12-02 3:12 ` [PATCH 08/24] HWPOISON: comment dirty swapcache pages Wu Fengguang
2009-12-02 3:12 ` [PATCH 09/24] HWPOISON: introduce delete_from_lru_cache() Wu Fengguang
2009-12-02 3:12 ` [PATCH 10/24] HWPOISON: remove the free buddy page handler Wu Fengguang
2009-12-02 13:13 ` Andi Kleen
2009-12-02 13:31 ` Wu Fengguang
2009-12-02 3:12 ` [PATCH 11/24] HWPOISON: detect free buddy pages explicitly Wu Fengguang
2009-12-02 3:12 ` [PATCH 12/24] HWPOISON: make it possible to unpoison pages Wu Fengguang
2009-12-02 13:15 ` Andi Kleen
2009-12-02 13:31 ` Wu Fengguang
2009-12-02 13:46 ` Wu Fengguang
2009-12-02 14:03 ` Andi Kleen
2009-12-03 1:45 ` Wu Fengguang
2009-12-02 3:12 ` [PATCH 13/24] HWPOISON: introduce struct hwpoison_control Wu Fengguang
2009-12-02 13:15 ` Andi Kleen
2009-12-02 3:12 ` [PATCH 14/24] HWPOISON: return 0 if page is assured to be isolated Wu Fengguang
2009-12-02 12:47 ` Andi Kleen
2009-12-02 13:15 ` Wu Fengguang
2009-12-02 3:12 ` [PATCH 15/24] HWPOISON: add fs/device filters Wu Fengguang
2009-12-02 3:12 ` [PATCH 16/24] HWPOISON: limit hwpoison injector to known page types Wu Fengguang
2009-12-02 8:11 ` Ingo Molnar
2009-12-02 3:12 ` [PATCH 17/24] mm: export stable page flags Wu Fengguang
2009-12-02 4:42 ` Wu Fengguang
2009-12-02 3:12 ` [PATCH 18/24] HWPOISON: add page flags filter Wu Fengguang
2009-12-02 3:12 ` [PATCH 19/24] memcg: rename and export try_get_mem_cgroup_from_page() Wu Fengguang
2009-12-03 1:58 ` Balbir Singh
2009-12-02 3:12 ` [PATCH 20/24] memcg: add accessor to mem_cgroup.css Wu Fengguang
2009-12-02 3:12 ` [PATCH 21/24] cgroup: define empty css_put() when !CONFIG_CGROUPS Wu Fengguang
2009-12-02 22:48 ` Paul Menage
2009-12-02 22:52 ` Andi Kleen
2009-12-03 1:53 ` Wu Fengguang
2009-12-02 3:12 ` [PATCH 22/24] HWPOISON: add memory cgroup filter Wu Fengguang
2009-12-02 12:44 ` Andi Kleen
2009-12-02 12:58 ` Wu Fengguang
2009-12-03 1:52 ` KAMEZAWA Hiroyuki
2009-12-03 2:19 ` Wu Fengguang
2009-12-03 2:28 ` KAMEZAWA Hiroyuki
2009-12-03 2:47 ` Wu Fengguang
2009-12-03 2:58 ` KAMEZAWA Hiroyuki
2009-12-03 15:03 ` Wu Fengguang
2009-12-03 2:15 ` Li Zefan [this message]
2009-12-03 2:20 ` Wu Fengguang
2009-12-03 2:28 ` Wu Fengguang
2009-12-02 3:12 ` [PATCH 23/24] HWPOISON: add an interface to switch off/on all the page filters Wu Fengguang
2009-12-02 3:12 ` [PATCH 24/24] HWPOISON: show corrupted file info Wu Fengguang
2009-12-02 13:20 ` Andi Kleen
2009-12-02 13:37 ` Wu Fengguang
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