From: Michal Hocko <mhocko@kernel.org>
To: Laurent Dufour <ldufour@linux.vnet.ibm.com>
Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>,
linux-kernel@vger.kernel.org, linux-mm@kvack.org,
akpm@linux-foundation.org
Subject: Re: [PATCH v2 1/2] mm: Uncharge poisoned pages
Date: Thu, 27 Apr 2017 16:37:21 +0200 [thread overview]
Message-ID: <20170427143721.GK4706@dhcp22.suse.cz> (raw)
In-Reply-To: <1493130472-22843-2-git-send-email-ldufour@linux.vnet.ibm.com>
On Tue 25-04-17 16:27:51, Laurent Dufour wrote:
> When page are poisoned, they should be uncharged from the root memory
> cgroup.
>
> This is required to avoid a BUG raised when the page is onlined back:
> BUG: Bad page state in process mem-on-off-test pfn:7ae3b
> page:f000000001eb8ec0 count:0 mapcount:0 mapping: (null)
> index:0x1
> flags: 0x3ffff800200000(hwpoison)
My knowledge of memory poisoning is very rudimentary but aren't those
pages supposed to leak and never come back? In other words isn't the
hoplug code broken because it should leave them alone?
--
Michal Hocko
SUSE Labs
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next prev parent reply other threads:[~2017-04-27 14:37 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-04-25 14:27 [PATCH v2 0/2] BUG raised when onlining HWPoisoned page Laurent Dufour
2017-04-25 14:27 ` [PATCH v2 1/2] mm: Uncharge poisoned pages Laurent Dufour
2017-04-25 23:48 ` Naoya Horiguchi
2017-04-26 1:54 ` Balbir Singh
2017-04-26 2:34 ` Naoya Horiguchi
2017-04-26 3:45 ` Balbir Singh
2017-04-26 4:46 ` Naoya Horiguchi
2017-04-26 8:59 ` Balbir Singh
2017-04-28 9:32 ` Laurent Dufour
2017-04-27 14:37 ` Michal Hocko [this message]
2017-04-27 20:51 ` Andi Kleen
2017-04-28 6:07 ` Michal Hocko
2017-04-28 7:31 ` Michal Hocko
2017-04-28 9:17 ` Laurent Dufour
2017-04-28 13:48 ` Michal Hocko
2017-05-02 14:59 ` Laurent Dufour
2017-05-02 18:55 ` Michal Hocko
2017-05-03 11:34 ` Laurent Dufour
2017-05-04 1:21 ` Balbir Singh
2017-05-08 10:42 ` Laurent Dufour
2017-05-09 1:41 ` Balbir Singh
2017-05-08 2:58 ` Naoya Horiguchi
2017-05-09 9:18 ` Michal Hocko
2017-05-09 22:59 ` Naoya Horiguchi
2017-04-25 14:27 ` [PATCH v2 2/2] mm: skip HWPoisoned pages when onlining pages Laurent Dufour
2017-04-26 2:10 ` Balbir Singh
2017-04-26 3:13 ` Naoya Horiguchi
2017-04-28 2:51 ` Balbir Singh
2017-04-28 6:30 ` Michal Hocko
2017-04-28 6:50 ` Michal Hocko
2017-04-28 6:51 ` Michal Hocko
2017-05-10 7:41 ` Michal Hocko
2018-01-17 23:03 ` Andrew Morton
2018-01-23 18:15 ` Laurent Dufour
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