From: Simon Jeons <simon.jeons@gmail.com>
To: Andi Kleen <andi@firstfloor.org>
Cc: Xishi Qiu <qiuxishi@huawei.com>,
Wanpeng Li <liwanp@linux.vnet.ibm.com>,
Andrew Morton <akpm@linux-foundation.org>,
WuJianguo <wujianguo@huawei.com>, Liujiang <jiang.liu@huawei.com>,
Vyacheslav.Dubeyko@huawei.com, Borislav Petkov <bp@alien8.de>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
wency@cn.fujitsu.com
Subject: Re: [PATCH V2] MCE: fix an error of mce_bad_pages statistics
Date: Mon, 10 Dec 2012 20:14:31 -0600 [thread overview]
Message-ID: <1355192071.1933.7.camel@kernel.cn.ibm.com> (raw)
In-Reply-To: <20121211020313.GV16230@one.firstfloor.org>
On Tue, 2012-12-11 at 03:03 +0100, Andi Kleen wrote:
> > IIUC, soft offlining will isolate and migrate hwpoisoned page, and this
> > page will not be accessed by memory management subsystem until unpoison,
> > correct?
>
> No, soft offlining can still allow accesses for some time. It'll never kill
> anything.
Oh, it will be putback to lru list during migration. So does your "some
time" mean before call check_new_page?
-Simon
>
> Hard tries much harder and will kill.
>
> In some cases (unshrinkable kernel allocation) they end up doing the same
> because there isn't any other alternative though. However these are
> expected to only apply to a small percentage of pages in a typical
> system.
>
> -Andi
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WARNING: multiple messages have this Message-ID (diff)
From: Simon Jeons <simon.jeons@gmail.com>
To: Andi Kleen <andi@firstfloor.org>
Cc: Xishi Qiu <qiuxishi@huawei.com>,
Wanpeng Li <liwanp@linux.vnet.ibm.com>,
Andrew Morton <akpm@linux-foundation.org>,
WuJianguo <wujianguo@huawei.com>, Liujiang <jiang.liu@huawei.com>,
Vyacheslav.Dubeyko@huawei.com, Borislav Petkov <bp@alien8.de>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
wency@cn.fujitsu.com
Subject: Re: [PATCH V2] MCE: fix an error of mce_bad_pages statistics
Date: Mon, 10 Dec 2012 20:14:31 -0600 [thread overview]
Message-ID: <1355192071.1933.7.camel@kernel.cn.ibm.com> (raw)
In-Reply-To: <20121211020313.GV16230@one.firstfloor.org>
On Tue, 2012-12-11 at 03:03 +0100, Andi Kleen wrote:
> > IIUC, soft offlining will isolate and migrate hwpoisoned page, and this
> > page will not be accessed by memory management subsystem until unpoison,
> > correct?
>
> No, soft offlining can still allow accesses for some time. It'll never kill
> anything.
Oh, it will be putback to lru list during migration. So does your "some
time" mean before call check_new_page?
-Simon
>
> Hard tries much harder and will kill.
>
> In some cases (unshrinkable kernel allocation) they end up doing the same
> because there isn't any other alternative though. However these are
> expected to only apply to a small percentage of pages in a typical
> system.
>
> -Andi
next prev parent reply other threads:[~2012-12-11 2:14 UTC|newest]
Thread overview: 66+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-12-07 8:48 [PATCH V2] MCE: fix an error of mce_bad_pages statistics Xishi Qiu
2012-12-07 8:48 ` Xishi Qiu
2012-12-07 14:33 ` Borislav Petkov
2012-12-07 14:33 ` Borislav Petkov
2012-12-07 22:11 ` Andrew Morton
2012-12-07 22:11 ` Andrew Morton
2012-12-07 22:41 ` Borislav Petkov
2012-12-07 22:41 ` Borislav Petkov
2012-12-10 4:33 ` Xishi Qiu
2012-12-10 4:33 ` Xishi Qiu
2012-12-10 8:33 ` Wanpeng Li
2012-12-10 9:06 ` Xishi Qiu
2012-12-10 9:06 ` Xishi Qiu
2012-12-10 10:47 ` Simon Jeons
2012-12-10 10:47 ` Simon Jeons
2012-12-10 11:16 ` Xishi Qiu
2012-12-10 11:16 ` Xishi Qiu
2012-12-10 11:39 ` Wanpeng Li
2012-12-10 11:39 ` Wanpeng Li
2012-12-10 11:54 ` Xishi Qiu
2012-12-10 11:54 ` Xishi Qiu
2012-12-10 12:11 ` Borislav Petkov
2012-12-10 12:11 ` Borislav Petkov
2012-12-10 15:39 ` Andi Kleen
2012-12-10 15:39 ` Andi Kleen
2012-12-10 11:58 ` Simon Jeons
2012-12-10 11:58 ` Simon Jeons
[not found] ` <1355140561.1821.5.camel@kernel.cn.ibm.com>
[not found] ` <50C5D844.8050707@huawei.com>
2012-12-10 12:47 ` Simon Jeons
2012-12-10 12:47 ` Simon Jeons
2012-12-11 1:16 ` Wanpeng Li
2012-12-11 6:49 ` Xishi Qiu
2012-12-11 6:49 ` Xishi Qiu
2012-12-11 8:02 ` Wanpeng Li
2012-12-11 8:02 ` Wanpeng Li
2012-12-11 1:16 ` Wanpeng Li
2012-12-10 15:38 ` Andi Kleen
2012-12-10 15:38 ` Andi Kleen
2012-12-11 1:49 ` Simon Jeons
2012-12-11 1:49 ` Simon Jeons
2012-12-11 2:03 ` Andi Kleen
2012-12-11 2:03 ` Andi Kleen
2012-12-11 2:14 ` Simon Jeons [this message]
2012-12-11 2:14 ` Simon Jeons
2012-12-11 3:01 ` Andi Kleen
2012-12-11 3:01 ` Andi Kleen
2012-12-11 3:13 ` Simon Jeons
2012-12-11 3:13 ` Simon Jeons
2012-12-11 3:19 ` Andi Kleen
2012-12-11 3:19 ` Andi Kleen
2012-12-11 3:48 ` Simon Jeons
2012-12-11 3:48 ` Simon Jeons
2012-12-11 5:55 ` Xishi Qiu
2012-12-11 5:55 ` Xishi Qiu
2012-12-11 6:34 ` Wanpeng Li
2012-12-11 6:34 ` Wanpeng Li
2012-12-11 2:25 ` Xishi Qiu
2012-12-11 2:25 ` Xishi Qiu
2012-12-11 2:45 ` Fengguang Wu
2012-12-11 2:45 ` Fengguang Wu
2012-12-11 2:58 ` Andi Kleen
2012-12-11 2:58 ` Andi Kleen
2012-12-11 3:25 ` Xishi Qiu
2012-12-11 3:25 ` Xishi Qiu
2012-12-11 3:36 ` Andi Kleen
2012-12-11 3:36 ` Andi Kleen
2012-12-10 8:33 ` Wanpeng Li
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