From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751491AbcFNPxa (ORCPT ); Tue, 14 Jun 2016 11:53:30 -0400 Received: from mail-bn1bon0112.outbound.protection.outlook.com ([157.56.111.112]:3040 "EHLO na01-bn1-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1750818AbcFNPx2 (ORCPT ); Tue, 14 Jun 2016 11:53:28 -0400 From: "Kani, Toshimitsu" To: "jmoyer@redhat.com" CC: "linux-kernel@vger.kernel.org" , "linux-nvdimm@ml01.01.org" , "agk@redhat.com" , "linux-raid@vger.kernel.org" , "snitzer@redhat.com" , "viro@zeniv.linux.org.uk" , "dan.j.williams@intel.com" , "axboe@kernel.dk" , "ross.zwisler@linux.intel.com" , "dm-devel@redhat.com" Subject: Re: [PATCH 0/6] Support DAX for device-mapper dm-linear devices Thread-Topic: [PATCH 0/6] Support DAX for device-mapper dm-linear devices Thread-Index: AQHRxcNvFc0gDtWw/UKSuO/qIYbBN5/oCDUAgAAIpoCAAOtKlYAAH0SA Date: Tue, 14 Jun 2016 15:53:23 +0000 Message-ID: <1465918997.3504.205.camel@hpe.com> References: <1465856497-19698-1-git-send-email-toshi.kani@hpe.com> <1465861755.3504.185.camel@hpe.com> In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: authentication-results: spf=none (sender IP is ) smtp.mailfrom=toshi.kani@hpe.com; x-originating-ip: [15.219.163.9] x-ms-office365-filtering-correlation-id: 23f059ef-16a5-49e1-17dc-08d3946c0449 x-microsoft-exchange-diagnostics: 1;DF4PR84MB0012;6:/6pHHyVC0/L/gqRJp8L7vHwKViPmJiKsvorm0Obo8q40DuO7bR6LGdy1waMA+KoNsRF/HOwCT1pcVU59fF8Idgln9Jv4DPewvddwnUiIdIDnXQ7U4ja1uBG1XOl5kZOUukHbeSnhkHyTkzBo0KZ9Un5MLYKS27X4vPmAIMN8M5PJKl4nkiaQdT5ZHuApZ2oTngQMTCelwRxsZ0+Y9kZ0E1RFWP6SlZEkJUp+GLUUS6oUfLrE4GynY7A+ZXTADL1So6BoKy531lbC2G7vS7svGGLu4BJysDa57CGc1SS2AQs=;5:8AO63hJap10J8lMSV+BHU1t1COBMKE3m3f7bu16a90CSsTkFzuPHgzhkutYURdNvrim7qL11CXSyiEUPHos0ys1RRuN+MzQXYreKTyKaHUHQHMWKQLEHyulQreLQAr0DRr5Q7fkgbRLuI+kQgs+gvw==;24:28AUsUjIRX7yI1BiRQti/QBIgaPEm5Bpxwx/zMb2nRS0c5UgkP3EKkaXg89F0RIOqBY3NhErvAg2RGXVj9alZHTqg4E8dixZl9rAx6FkM50=;7:Dau/muVEZDPfAvC9DiW313Y+2JAuhqC5HuWUt7UkHA9eVfxdtnx1PzF6+y/IEbEAYvFJaca7DOvwnrQA6DrXeVw+AxqMsNCyu9oVxxH0vaotPA8Wm2qel56XRTvan1Km/ogdfduxXa+HM/enJzsDMxRJwO+wvaUM+r9amp2swiaLRbmT5kKADm12BcQoX32MHnUReCZw+e0q6G0vYfX+s5LXM9Pcrl7QfnquR0n4RD0= x-microsoft-antispam: UriScan:;BCL:0;PCL:0;RULEID:;SRVR:DF4PR84MB0012; x-microsoft-antispam-prvs: x-exchange-antispam-report-test: UriScan:(227479698468861)(100405760836317); x-exchange-antispam-report-cfa-test: BCL:0;PCL:0;RULEID:(601004)(2401047)(8121501046)(5005006)(10201501046)(3002001);SRVR:DF4PR84MB0012;BCL:0;PCL:0;RULEID:;SRVR:DF4PR84MB0012; x-forefront-prvs: 09730BD177 x-forefront-antispam-report: SFV:NSPM;SFS:(10019020)(6009001)(7916002)(24454002)(377424004)(199003)(189002)(33646002)(122556002)(86362001)(4326007)(66066001)(99286002)(2351001)(106116001)(2906002)(106356001)(105586002)(586003)(3846002)(11100500001)(102836003)(6116002)(10400500002)(2501003)(8936002)(19580405001)(5004730100002)(77096005)(36756003)(5002640100001)(103116003)(19580395003)(76176999)(54356999)(2950100001)(189998001)(2900100001)(87936001)(5640700001)(3280700002)(93886004)(101416001)(5008740100001)(92566002)(81166006)(1730700003)(81156014)(8676002)(50986999)(97736004)(3660700001)(110136002)(68736007);DIR:OUT;SFP:1102;SCL:1;SRVR:DF4PR84MB0012;H:DF4PR84MB0010.NAMPRD84.PROD.OUTLOOK.COM;FPR:;SPF:None;PTR:InfoNoRecords;A:1;MX:1;CAT:NONE;LANG:en;CAT:NONE; spamdiagnosticoutput: 1:99 spamdiagnosticmetadata: NSPM Content-Type: text/plain; charset="utf-8" Content-ID: <30F13C215BC7BA4285FCCC4DB0BDE3FA@NAMPRD84.PROD.OUTLOOK.COM> MIME-Version: 1.0 X-OriginatorOrg: hpe.com X-MS-Exchange-CrossTenant-originalarrivaltime: 14 Jun 2016 15:53:23.7399 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: 105b2061-b669-4b31-92ac-24d304d195dc X-MS-Exchange-Transport-CrossTenantHeadersStamped: DF4PR84MB0012 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from base64 to 8bit by mail.home.local id u5EFrXu4017960 On Tue, 2016-06-14 at 09:50 -0400, Jeff Moyer wrote: > "Kani, Toshimitsu" writes: > > > I had dm-linear and md-raid0 support on my list of things to look at, > > > did you have raid0 in your plans? > > > > Yes, I hope to extend further and raid0 is a good candidate. > > dm-flakey would allow more xfstests test cases to run.  I'd say that's > more important than linear or raid0.  ;-) That's an interesting one.  We can emulate badblocks by failing direct_access with -EIO, but I do not think we can emulate "drop_writes" and "corrupt_bio_byte" features with DAX... > Also, the next step in this work is to then decide how to determine on > what numa node an LBA resides.  We had discussed this at a prior > plumbers conference, and I think the consensus was to use xattrs. > Toshi, do you also plan to do that work? No, it's not my plan at this point. Thanks, -Toshi