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From: Qian Cai <cai@lca.pw>
To: " HORIGUCHI NAOYA(堀口　直也) " <naoya.horiguchi@nec.com>
Cc: "nao.horiguchi@gmail.com" <nao.horiguchi@gmail.com>,
	"linux-mm@kvack.org" <linux-mm@kvack.org>,
	"mhocko@kernel.org" <mhocko@kernel.org>,
	"akpm@linux-foundation.org" <akpm@linux-foundation.org>,
	"mike.kravetz@oracle.com" <mike.kravetz@oracle.com>,
	"osalvador@suse.de" <osalvador@suse.de>,
	"tony.luck@intel.com" <tony.luck@intel.com>,
	"david@redhat.com" <david@redhat.com>,
	"aneesh.kumar@linux.vnet.ibm.com"
	<aneesh.kumar@linux.vnet.ibm.com>,
	"zeil@yandex-team.ru" <zeil@yandex-team.ru>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	"linux-arm-kernel@lists.infradead.org" 
	<linux-arm-kernel@lists.infradead.org>,
	"catalin.marinas@arm.com" <catalin.marinas@arm.com>,
	"will@kernel.org" <will@kernel.org>
Subject: Re: [PATCH v6 00/12] HWPOISON: soft offline rework
Date: Mon, 10 Aug 2020 23:45:36 -0400	[thread overview]
Message-ID: <6214D3DD-7EB1-4598-8DA2-344430EC7858@lca.pw> (raw)
In-Reply-To: <20200811031139.GA7145@hori.linux.bs1.fc.nec.co.jp>



> On Aug 10, 2020, at 11:11 PM, HORIGUCHI NAOYA(堀口　直也) <naoya.horiguchi@nec.com> wrote:
> 
> I'm still not sure why the test succeeded by reverting these because
> current mainline kernel provides similar mechanism to prevent reuse of
> soft offlined page. So this success seems to me something suspicious.

Even if we call munmap() on the range, it still can’t be be reused? If so, how to recover those memory then?

> 
> To investigate more, I want to have additional info about the page states
> of the relevant pages after soft offlining.  Could you collect it by the
> following steps?

Do you want to collect those from the failed or succeed kernel?

WARNING: multiple messages have this Message-ID (diff)
From: Qian Cai <cai@lca.pw>
To: " HORIGUCHI NAOYA(堀口　直也) " <naoya.horiguchi@nec.com>
Cc: "tony.luck@intel.com" <tony.luck@intel.com>,
	"david@redhat.com" <david@redhat.com>,
	"catalin.marinas@arm.com" <catalin.marinas@arm.com>,
	"zeil@yandex-team.ru" <zeil@yandex-team.ru>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	"nao.horiguchi@gmail.com" <nao.horiguchi@gmail.com>,
	"mhocko@kernel.org" <mhocko@kernel.org>,
	"linux-mm@kvack.org" <linux-mm@kvack.org>,
	"aneesh.kumar@linux.vnet.ibm.com"
	<aneesh.kumar@linux.vnet.ibm.com>,
	"akpm@linux-foundation.org" <akpm@linux-foundation.org>,
	"osalvador@suse.de" <osalvador@suse.de>,
	"will@kernel.org" <will@kernel.org>,
	"linux-arm-kernel@lists.infradead.org"
	<linux-arm-kernel@lists.infradead.org>,
	"mike.kravetz@oracle.com" <mike.kravetz@oracle.com>
Subject: Re: [PATCH v6 00/12] HWPOISON: soft offline rework
Date: Mon, 10 Aug 2020 23:45:36 -0400	[thread overview]
Message-ID: <6214D3DD-7EB1-4598-8DA2-344430EC7858@lca.pw> (raw)
In-Reply-To: <20200811031139.GA7145@hori.linux.bs1.fc.nec.co.jp>



> On Aug 10, 2020, at 11:11 PM, HORIGUCHI NAOYA(堀口　直也) <naoya.horiguchi@nec.com> wrote:
> 
> I'm still not sure why the test succeeded by reverting these because
> current mainline kernel provides similar mechanism to prevent reuse of
> soft offlined page. So this success seems to me something suspicious.

Even if we call munmap() on the range, it still can’t be be reused? If so, how to recover those memory then?

> 
> To investigate more, I want to have additional info about the page states
> of the relevant pages after soft offlining.  Could you collect it by the
> following steps?

Do you want to collect those from the failed or succeed kernel?
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

  reply	other threads:[~2020-08-11  3:45 UTC|newest]

Thread overview: 33+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-08-06 18:49 [PATCH v6 00/12] HWPOISON: soft offline rework nao.horiguchi
2020-08-06 18:49 ` [PATCH v6 01/12] mm,hwpoison: cleanup unused PageHuge() check nao.horiguchi
2020-08-06 18:49 ` [PATCH v6 02/12] mm, hwpoison: remove recalculating hpage nao.horiguchi
2020-08-06 18:49 ` [PATCH v6 03/12] mm,hwpoison-inject: don't pin for hwpoison_filter nao.horiguchi
2020-08-06 18:49 ` [PATCH v6 04/12] mm,hwpoison: Un-export get_hwpoison_page and make it static nao.horiguchi
2020-08-06 18:49 ` [PATCH v6 05/12] mm,hwpoison: Kill put_hwpoison_page nao.horiguchi
2020-08-06 18:49 ` [PATCH v6 06/12] mm,hwpoison: Unify THP handling for hard and soft offline nao.horiguchi
2020-08-06 18:49 ` [PATCH v6 07/12] mm,hwpoison: Rework soft offline for free pages nao.horiguchi
2020-08-06 18:49 ` [PATCH v6 08/12] mm,hwpoison: Rework soft offline for in-use pages nao.horiguchi
2020-09-18  7:58   ` osalvador
2020-09-19  0:23     ` Andrew Morton
2020-09-19  8:26       ` osalvador
2020-08-06 18:49 ` [PATCH v6 09/12] mm,hwpoison: Refactor soft_offline_huge_page and __soft_offline_page nao.horiguchi
2020-08-06 18:49 ` [PATCH v6 10/12] mm,hwpoison: Return 0 if the page is already poisoned in soft-offline nao.horiguchi
2020-08-06 18:49 ` [PATCH v6 11/12] mm,hwpoison: introduce MF_MSG_UNSPLIT_THP nao.horiguchi
2020-08-06 18:49 ` [PATCH v6 12/12] mm,hwpoison: double-check page count in __get_any_page() nao.horiguchi
2020-08-24 12:21   ` Oscar Salvador
2020-08-10 15:22 ` [PATCH v6 00/12] HWPOISON: soft offline rework Qian Cai
2020-08-10 15:22   ` Qian Cai
2020-08-11  3:11   ` HORIGUCHI NAOYA(堀口　直也)
2020-08-11  3:11     ` HORIGUCHI NAOYA(堀口　直也)
2020-08-11  3:11     ` HORIGUCHI NAOYA(堀口　直也)
2020-08-11  3:45     ` Qian Cai [this message]
2020-08-11  3:45       ` Qian Cai
2020-08-11  3:56       ` HORIGUCHI NAOYA(堀口　直也)
2020-08-11  3:56         ` HORIGUCHI NAOYA(堀口　直也)
2020-08-11  3:56         ` HORIGUCHI NAOYA(堀口　直也)
2020-08-11 17:39     ` Qian Cai
2020-08-11 17:39       ` Qian Cai
2020-08-11 19:32       ` Naoya Horiguchi
2020-08-11 19:32         ` Naoya Horiguchi
2020-08-11 22:06         ` Qian Cai
2020-08-11 22:06           ` Qian Cai

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