Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756207AbaAIJGt (ORCPT ); Thu, 9 Jan 2014 04:06:49 -0500 Received: from mail-wi0-f178.google.com ([209.85.212.178]:54330 "EHLO mail-wi0-f178.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754147AbaAIJGn (ORCPT ); Thu, 9 Jan 2014 04:06:43 -0500 From: Michal Nazarewicz To: Joonsoo Kim , Andrew Morton Cc: "Kirill A. Shutemov" , Rik van Riel , Jiang Liu , Mel Gorman , Cody P Schafer , Johannes Weiner , Michal Hocko , Minchan Kim , Andi Kleen , Wei Yongjun , Tang Chen , linux-mm@kvack.org, linux-kernel@vger.kernel.org, Joonsoo Kim , Joonsoo Kim Subject: Re: [PATCH 0/7] improve robustness on handling migratetype In-Reply-To: <1389251087-10224-1-git-send-email-iamjoonsoo.kim@lge.com> Organization: http://mina86.com/ References: <1389251087-10224-1-git-send-email-iamjoonsoo.kim@lge.com> User-Agent: Notmuch/0.17+15~gb65ca8e (http://notmuchmail.org) Emacs/24.3.50.1 (x86_64-unknown-linux-gnu) X-Face: PbkBB1w#)bOqd`iCe"Ds{e+!C7`pkC9a|f)Qo^BMQvy\q5x3?vDQJeN(DS?|-^$uMti[3D*#^_Ts"pU$jBQLq~Ud6iNwAw_r_o_4]|JO?]}P_}Nc&"p#D(ZgUb4uCNPe7~a[DbPG0T~!&c.y$Ur,=N4RT>]dNpd;KFrfMCylc}gc??'U2j,!8%xdD Face: 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 X-PGP: 50751FF4 X-PGP-FP: AC1F 5F5C D418 88F8 CC84 5858 2060 4012 5075 1FF4 X-Hashcash: 1:20:140109:kirill.shutemov@linux.intel.com::Yf0jqtrZHZFT1n4a:00000000000000000000000000000002bk X-Hashcash: 1:20:140109:js1304@gmail.com::uV8zNzeFABzcIKe3:00RaG X-Hashcash: 1:20:140109:minchan@kernel.org::7n8qCTBv0U/6i5M6:00000000000000000000000000000000000000000000jcz X-Hashcash: 1:20:140109:iamjoonsoo.kim@lge.com::N200yJdbCWAqF8Zn:0000000000000000000000000000000000000000+Zs X-Hashcash: 1:20:140109:linux-kernel@vger.kernel.org::6bXCcJrF8iuvNcLp:0000000000000000000000000000000000pRH X-Hashcash: 1:20:140109:riel@redhat.com::C6oMFZc8KEcUjtMN:001RHr X-Hashcash: 1:20:140109:ak@linux.intel.com::vrzKyUV8oWrth56x:00000000000000000000000000000000000000000001hnH X-Hashcash: 1:20:140109:jiang.liu@huawei.com::y1sjOQxNpZKoMh8j:000000000000000000000000000000000000000003ETz X-Hashcash: 1:20:140109:linux-mm@kvack.org::m9NjOMu+9ogv7l9e:00000000000000000000000000000000000000000003Txy X-Hashcash: 1:20:140109:mhocko@suse.cz::hiJRjHQ2aRv/SCBF:0003iyz X-Hashcash: 1:20:140109:iamjoonsoo.kim@lge.com::q1KdE2JLIBAhe727:0000000000000000000000000000000000000004avY X-Hashcash: 1:20:140109:cody@linux.vnet.ibm.com::Kp1tAOA1vFDYnx3W:000000000000000000000000000000000000004GeS X-Hashcash: 1:20:140109:yongjun_wei@trendmicro.com.cn::FbYTV0/fLTN3S+WA:000000000000000000000000000000005WdQ X-Hashcash: 1:20:140109:tangchen@cn.fujitsu.com::ULP8mvgqE8TNgna6:000000000000000000000000000000000000005CLq X-Hashcash: 1:20:140109:akpm@linux-foundation.org::f9QDGTvm7ljz+NPN:0000000000000000000000000000000000007jsx X-Hashcash: 1:20:140109:mgorman@suse.de::VSLNBq+wAk9KrFtn:00C1l8 X-Hashcash: 1:20:140109:hannes@cmpxchg.org::5XJiw3Z8lU2d6c4d:0000000000000000000000000000000000000000000EO6z Date: Thu, 09 Jan 2014 10:06:34 +0100 Message-ID: MIME-Version: 1.0 Content-Type: multipart/mixed; boundary="=-=-=" Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --=-=-= Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable On Thu, Jan 09 2014, Joonsoo Kim wrote: > Third, there is the problem on buddy allocator. It doesn't consider > migratetype when merging buddy, so pages from cma or isolate region can > be moved to other migratetype freelist. It makes CMA failed over and over. > To prevent it, the buddy allocator should consider migratetype if > CMA/ISOLATE is enabled. There should never be situation where a CMA page shares a pageblock (or a max-order page) with a non-CMA page though, so this should never be an issue. --=20 Best regards, _ _ .o. | Liege of Serenely Enlightened Majesty of o' \,=3D./ `o ..o | Computer Science, Micha=C5=82 =E2=80=9Cmina86=E2=80=9D Nazarewicz = (o o) ooo +------ooO--(_)--Ooo-- --=-=-= Content-Type: multipart/signed; boundary="==-=-="; micalg=pgp-sha1; protocol="application/pgp-signature" --==-=-= Content-Type: text/plain --==-=-= Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) iQIcBAEBAgAGBQJSzmaaAAoJECBgQBJQdR/03rwP/A70MFWvk9Zz81DwMlNFZQTi jkeQWXQbKlz0Q6W3FPaTZK7nTqIcRQCwfttIGrnvWJOjw9IfLyWNSdzHaI8eQZsB 2Wyw0jUhhv4ARwOSEopst5Z+oeAmeJKHz4meJObdaH+3szfxNZm5wyl0RaNLqDGd 8MsfmnmLbgTNE/l/Fl2lNzGod36T51DMfzgTqVnBO3zK7WU8iAO3jP3y99aoijbZ TbV3IH12T6heh/bYN9ky/FIxZ9LGI59pr0AvrvHzPEHD3ubE6La/40XCbosjsKif MGw+2KmgL4/old+Xdtl6fm1hRAvnjpYk6rBVEzBlSZNcbHu5avfYJjcAfgV9sfMS i9E02AuI3muTPvglCtAUtciBMdDcqbR8DLyJO8SYNqPqSZz4LtVz0pBqkpQyq7Uw onUiuzlLSYvD7U1v8KfmRmhMkeIvBRGma2ifOoUOMCLIkhbBE0EIFztis/0BcjTf CyWHDAMDI2ThkyM+aOgygrS0bnnDCHQDHWv3XvColu+Of6gRQL5gU/KyKI0Mau5T Zh8DQKlX0u0BZ9Kt7HZ44SNrwEDzpf7Ov/KBgZF/Meg/fDnL06KJOMWjWG6jjTLp 1H6mQiqChwyVJ7qS2RoTWtG78sqI/xgBFVGFzogTehypy0UoRB6C64QjfHkg8SIW SKevhN+2RDwN3u2FDdC5 =9KuD -----END PGP SIGNATURE----- --==-=-=-- --=-=-=-- -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/