Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756011AbbKEUNS (ORCPT ); Thu, 5 Nov 2015 15:13:18 -0500 Received: from mail-qg0-f54.google.com ([209.85.192.54]:36734 "EHLO mail-qg0-f54.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755795AbbKEUNQ (ORCPT ); Thu, 5 Nov 2015 15:13:16 -0500 Subject: Re: [PATCH v2 01/13] mm: support madvise(MADV_FREE) To: Shaohua Li References: <1446600367-7976-1-git-send-email-minchan@kernel.org> <1446600367-7976-2-git-send-email-minchan@kernel.org> <56399CA5.8090101@gmail.com> <563A813B.9080903@gmail.com> <20151105181726.GA63566@kernel.org> Cc: Andy Lutomirski , Minchan Kim , Hugh Dickins , Andrew Morton , Michael Kerrisk , Michal Hocko , "linux-mm@kvack.org" , KOSAKI Motohiro , "Kirill A. Shutemov" , Rik van Riel , Johannes Weiner , Linux API , Jason Evans , "linux-kernel@vger.kernel.org" , yalin wang , Mel Gorman From: Daniel Micay Message-ID: <563BB855.6020304@gmail.com> Date: Thu, 5 Nov 2015 15:13:09 -0500 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.3.0 MIME-Version: 1.0 In-Reply-To: <20151105181726.GA63566@kernel.org> Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="ClqICLLTDgILX9WnJ236tnF4v7NNE29Gh" Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2026 Lines: 47 This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --ClqICLLTDgILX9WnJ236tnF4v7NNE29Gh Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: quoted-printable > I posted a patch doing exactly iovec madvise. Doesn't support MADV_FREE= yet > though, but should be easy to do it. >=20 > http://marc.info/?l=3Dlinux-mm&m=3D144615663522661&w=3D2 I think that would be a great way to deal with this. It keeps the nice property of still being able to drop pages in allocations that have been handed out but not yet touched. The allocator just needs to be designed to do lots of purging in one go (i.e. something like an 8:1 active:clean ratio triggers purging and it goes all the way to 16:1). --ClqICLLTDgILX9WnJ236tnF4v7NNE29Gh Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v2 iQIcBAEBCAAGBQJWO7hZAAoJEPnnEuWa9fIq5usQAI/qFzkBpBjxnmiLTb8sPPzm OUZp6yZi5bjcreflXXxsvufHbOZ1zqkVFe8JnxGn+Pg1chYSEm4xRUyK/9LCchqR 1Be3avsVfUPJGuiRrHnrY6Qq46Vmk2Iu6HaY8vgkmN/c/qMifY8PgADPQ+RPJ7Du yNkm1kpBoxoYnKu5X2QCfQU6G8TJGCUA+nuqalvNPSqySHAfl5slAXvLJUFc42gg CENG0PWWsPQXbPQGYP3CAuKxMW+hNw7YnG5J2SYyncjnviVfjdoo1aIgINkRokY9 z5CtxU3EEI7B5H8qPWiRe6i/2/JLUMlnixEVsTyh4Nr1yLNYP43jCeH+/+CKIiQK ABOcnjPBfqEiHbzF5V1DOOUbzOBDiM0TonVgfUPhX3+IY7Dbm73d+ErX98fJmPI2 EufQaD6ZN+KcUj8lWR1pBACzC7wUUn86HJYLuHFv3hbmMqVKDlOiV5C7KIpJ0+nD foQeyiwxoIJNiSAkIv/Y764IVrWo6S3z7U8sTHUeF+E3YMnl6uOngySG/Arwiynl PeswqHKYi/LDF2sEYlFGYeQRF+yCQ2cTqiVZcl1mhkDJjhZt2goiY0pzxb36/XZo HKwGEAruCW+aDAt5aXzjylzU6kPkWiuwZh8BBZ/Ya7bMrPcgxV0AqZGWvnTb3m4/ +dwvdZaiiHv8o6jEcXy+ =X40y -----END PGP SIGNATURE----- --ClqICLLTDgILX9WnJ236tnF4v7NNE29Gh-- -- 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/