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From: "HORIGUCHI NAOYA(堀口　直也)" <naoya.horiguchi@nec.com>
To: Oscar Salvador <osalvador@suse.de>
Cc: "akpm@linux-foundation.org" <akpm@linux-foundation.org>,
	"aris@ruivo.org" <aris@ruivo.org>,
	"mhocko@kernel.org" <mhocko@kernel.org>,
	"tony.luck@intel.com" <tony.luck@intel.com>,
	"cai@lca.pw" <cai@lca.pw>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	"linux-mm@kvack.org" <linux-mm@kvack.org>
Subject: Re: [PATCH v7 08/14] mm,hwpoison: rework soft offline for free pages
Date: Wed, 23 Sep 2020 07:27:33 +0000	[thread overview]
Message-ID: <20200923072733.GA15221@hori.linux.bs1.fc.nec.co.jp> (raw)
In-Reply-To: <20200922135650.1634-9-osalvador@suse.de>

On Tue, Sep 22, 2020 at 03:56:44PM +0200, Oscar Salvador wrote:
> When trying to soft-offline a free page, we need to first take it off the
> buddy allocator.
> Once we know is out of reach, we can safely flag it as poisoned.
> 
> take_page_off_buddy will be used to take a page meant to be poisoned off
> the buddy allocator. take_page_off_buddy calls break_down_buddy_pages,
> which splits a higher-order page in case our page belongs to one.
> 
> Once the page is under our control, we call page_handle_poison to set it
> as poisoned and grab a refcount on it.
> 
> Signed-off-by: Oscar Salvador <osalvador@suse.de>

Acked-by: Naoya Horiguchi <naoya.horiguchi@nec.com>

  reply	other threads:[~2020-09-23  7:27 UTC|newest]

Thread overview: 27+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-09-22 13:56 [PATCH v7 00/14] HWPOISON: soft offline rework Oscar Salvador
2020-09-22 13:56 ` [PATCH v7 01/14] mm,hwpoison: cleanup unused PageHuge() check Oscar Salvador
2020-09-22 13:56 ` [PATCH v7 02/14] mm, hwpoison: remove recalculating hpage Oscar Salvador
2020-09-22 13:56 ` [PATCH v7 03/14] mm,hwpoison-inject: don't pin for hwpoison_filter Oscar Salvador
2020-09-22 13:56 ` [PATCH v7 04/14] mm,hwpoison: unexport get_hwpoison_page and make it static Oscar Salvador
2020-09-23  7:24   ` HORIGUCHI NAOYA(堀口　直也)
2020-09-22 13:56 ` [PATCH v7 05/14] mm,hwpoison: refactor madvise_inject_error Oscar Salvador
2020-09-23  7:24   ` HORIGUCHI NAOYA(堀口　直也)
2020-09-22 13:56 ` [PATCH v7 06/14] mm,hwpoison: kill put_hwpoison_page Oscar Salvador
2020-09-23  7:24   ` HORIGUCHI NAOYA(堀口　直也)
2020-09-22 13:56 ` [PATCH v7 07/14] mm,hwpoison: unify THP handling for hard and soft offline Oscar Salvador
2020-09-23  7:26   ` HORIGUCHI NAOYA(堀口　直也)
2020-09-22 13:56 ` [PATCH v7 08/14] mm,hwpoison: rework soft offline for free pages Oscar Salvador
2020-09-23  7:27   ` HORIGUCHI NAOYA(堀口　直也) [this message]
2020-09-22 13:56 ` [PATCH v7 09/14] mm,hwpoison: rework soft offline for in-use pages Oscar Salvador
2020-09-23  7:30   ` HORIGUCHI NAOYA(堀口　直也)
2020-09-22 13:56 ` [PATCH v7 10/14] mm,hwpoison: refactor soft_offline_huge_page and __soft_offline_page Oscar Salvador
2020-09-23  7:35   ` HORIGUCHI NAOYA(堀口　直也)
2020-09-22 13:56 ` [PATCH v7 11/14] mm,hwpoison: return 0 if the page is already poisoned in soft-offline Oscar Salvador
2020-09-23  7:39   ` HORIGUCHI NAOYA(堀口　直也)
2020-09-22 13:56 ` [PATCH v7 12/14] mm,hwpoison: introduce MF_MSG_UNSPLIT_THP Oscar Salvador
2020-09-22 13:56 ` [PATCH v7 13/14] mm,hwpoison: double-check page count in __get_any_page() Oscar Salvador
2020-09-22 13:56 ` [PATCH v7 14/14] mm,hwpoison: Try to narrow window race for free pages Oscar Salvador
2020-09-23  7:40   ` HORIGUCHI NAOYA(堀口　直也)
2020-09-22 17:03 ` [PATCH v7 00/14] HWPOISON: soft offline rework Andrew Morton
2020-09-22 17:56   ` osalvador
2020-09-23 13:29 ` Aristeu Rozanski

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