From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wi0-f180.google.com (mail-wi0-f180.google.com [209.85.212.180]) by kanga.kvack.org (Postfix) with ESMTP id E0B246B0031 for ; Thu, 9 Jan 2014 04:06:42 -0500 (EST) Received: by mail-wi0-f180.google.com with SMTP id hm19so3166574wib.1 for ; Thu, 09 Jan 2014 01:06:42 -0800 (PST) Received: from mail-we0-x230.google.com (mail-we0-x230.google.com [2a00:1450:400c:c03::230]) by mx.google.com with ESMTPS id x6si2200249wib.85.2014.01.09.01.06.42 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Thu, 09 Jan 2014 01:06:42 -0800 (PST) Received: by mail-we0-f176.google.com with SMTP id p61so2431870wes.21 for ; Thu, 09 Jan 2014 01:06:41 -0800 (PST) From: Michal Nazarewicz Subject: Re: [PATCH 0/7] improve robustness on handling migratetype In-Reply-To: <1389251087-10224-1-git-send-email-iamjoonsoo.kim@lge.com> References: <1389251087-10224-1-git-send-email-iamjoonsoo.kim@lge.com> Date: Thu, 09 Jan 2014 10:06:34 +0100 Message-ID: MIME-Version: 1.0 Content-Type: multipart/mixed; boundary="=-=-=" Sender: owner-linux-mm@kvack.org List-ID: 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 --=-=-= 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, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org