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Shutemov" Subject: Re: [LSF/MM TOPIC] (again) THP for file systems Thread-Topic: [LSF/MM TOPIC] (again) THP for file systems Thread-Index: AQHUw+d91LnZv2+dn0iH+77xUzeGLKXeaKSAgAAhgQA= Date: Thu, 14 Feb 2019 01:59:55 +0000 Message-ID: <843818E0-C7E8-451E-A5B1-DAF0F120BD5A@fb.com> References: <77A00946-D70D-469D-963D-4C4EA20AE4FA@fb.com> <20190213235959.GX12668@bombadil.infradead.org> In-Reply-To: <20190213235959.GX12668@bombadil.infradead.org> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-mailer: Apple Mail (2.3445.102.3) x-originating-ip: [2620:10d:c090:180::1:757a] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: e68b61ed-9cfc-471b-33b2-08d692201e06 x-microsoft-antispam: BCL:0;PCL:0;RULEID:(2390118)(7020095)(4652040)(8989299)(4534185)(4627221)(201703031133081)(201702281549075)(8990200)(5600110)(711020)(4605077)(2017052603328)(7153060)(7193020);SRVR:MWHPR15MB1664; x-ms-traffictypediagnostic: MWHPR15MB1664: x-ms-exchange-purlcount: 2 x-microsoft-exchange-diagnostics: 1;MWHPR15MB1664;20:gGdmQOqdcoAWbkYV1ejN+RigJQAFvq/kVi8jxshKfDHqGSfCUoxBuJMv1nmxbIM3/Znc1clztdyNwDAaxxCen4FJquBFrbmnAgSt5UVf4F+RltwUWlL4BNwsot2Uoj1/fRiSX2WPbwxlNFNegJx2mapNlbaCg3FYO8Unu1/OLiU= x-microsoft-antispam-prvs: x-forefront-prvs: 09480768F8 x-forefront-antispam-report: SFV:NSPM;SFS:(10019020)(39860400002)(366004)(136003)(346002)(376002)(396003)(189003)(199004)(51914003)(71190400001)(6916009)(11346002)(476003)(46003)(2616005)(446003)(6506007)(57306001)(186003)(6486002)(229853002)(71200400001)(478600001)(6116002)(6436002)(486006)(6512007)(6306002)(4326008)(14454004)(25786009)(53546011)(102836004)(68736007)(97736004)(36756003)(86362001)(6246003)(82746002)(105586002)(106356001)(256004)(316002)(81156014)(33656002)(54906003)(8676002)(50226002)(53936002)(83716004)(8936002)(966005)(99286004)(2906002)(81166006)(7736002)(305945005)(76176011);DIR:OUT;SFP:1102;SCL:1;SRVR:MWHPR15MB1664;H:MWHPR15MB1165.namprd15.prod.outlook.com;FPR:;SPF:None;LANG:en;PTR:InfoNoRecords;MX:1;A:1; received-spf: None (protection.outlook.com: fb.com does not designate permitted sender hosts) x-ms-exchange-senderadcheck: 1 x-microsoft-antispam-message-info: WxjhtRndmtAH3EsyXP3tmq2sWZzcpWgmVnPittg29ShtYm6G8KpID09JoMitXhXrQJpFF43PRZ9fgCZuS2z+AaMlaGL64SKFLURkPimiiW2uY9Cnep5R0LF/JnvWN4wat5rG/yilM1Gcn/mhtE8muJLiTeYMctR/Yt5SE/n0AZZkkUe6g8TsMc7G8BexfMLVk03tnxzQLEqpFbzg691hd2qycjWL+07o1DMtfb5oD3Bu9yJWaf/YLZQUYqgBJ0WWIOKOiRfbhYsGNtYif328PYcOFm8Xs7gh1nR6X08bNQD6Iao8Lmwn3aHjyS/8T+53v2UP9m2fBVix/C2JBfFD3gFkeLI/7ofOW1gZwiOuJ5phWSnKU04QaYYfzyWDwx6rGPQApio8kfO/Wix6wfACtKFdyp8ogbmPdofnnWbDHPU= Content-Type: text/plain; charset="us-ascii" Content-ID: <050ED4B99A554F4AACE4A77BAE0F3527@namprd15.prod.outlook.com> Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-MS-Exchange-CrossTenant-Network-Message-Id: e68b61ed-9cfc-471b-33b2-08d692201e06 X-MS-Exchange-CrossTenant-originalarrivaltime: 14 Feb 2019 01:59:55.8664 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 8ae927fe-1255-47a7-a2af-5f3a069daaa2 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-Transport-CrossTenantHeadersStamped: MWHPR15MB1664 X-OriginatorOrg: fb.com X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2019-02-14_01:,, signatures=0 X-Proofpoint-Spam-Reason: safe X-FB-Internal: Safe Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > On Feb 13, 2019, at 3:59 PM, Matthew Wilcox wrote: >=20 > On Wed, Feb 13, 2019 at 10:00:10PM +0000, Song Liu wrote: >> I would like to discuss remaining work to bring THP to (non-tmpfs) file = systems. >> This topic has been discussed multiple times in previous LSF/MM summits = [1][2]. >> However, there hasn't been much progress since late 2017 (the latest wor= k I can >> find is by Kirill A. Shutemov [3]). >=20 > ... this was literally just discussed. >=20 > Feel free to review > https://lore.kernel.org/lkml/20190212183454.26062-1-willy@infradead.org/ >=20 > with particular reference to the last three paragraphs of > https://lore.kernel.org/lkml/20190208042448.GB21860@bombadil.infradead.or= g/ Thanks for the pointers! I will read the patches and related code. =20 >=20 >> Therefore, we would like discuss (for one more time) what is needed to b= ring >> THP to file systems like ext4, xfs, btrfs, etc. Once we are aligned on t= he >> direction, we are more than happy to commit time and resource to make it= happen. >=20 > I believe the direction is clear. It needs people to do the work. > We're critically short of reviewers. I got precious little review of > the original XArray work, which made Andrew nervous and delayed its > integration. Now I'm getting little review of the followup patches > to lay the groundwork for filesystems to support larger page sizes. > I have very little patience for this situation. I don't feel I am a qualified reviewer for MM patches, yet. But I will=20 try my best to catch up.=20 Thanks again, Song=