From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C5C12C83008 for ; Tue, 28 Apr 2020 22:02:41 +0000 (UTC) Received: from ml01.01.org (ml01.01.org [198.145.21.10]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id A51F6206D6 for ; Tue, 28 Apr 2020 22:02:41 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A51F6206D6 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=fromorbit.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-nvdimm-bounces@lists.01.org Received: from ml01.vlan13.01.org (localhost [IPv6:::1]) by ml01.01.org (Postfix) with ESMTP id 92F1B110D268C; Tue, 28 Apr 2020 15:01:41 -0700 (PDT) Received-SPF: Pass (helo) identity=helo; client-ip=211.29.132.249; helo=mail105.syd.optusnet.com.au; envelope-from=david@fromorbit.com; receiver= Received: from mail105.syd.optusnet.com.au (mail105.syd.optusnet.com.au [211.29.132.249]) by ml01.01.org (Postfix) with ESMTP id 869121007A9ED for ; Tue, 28 Apr 2020 15:01:38 -0700 (PDT) Received: from dread.disaster.area (pa49-195-157-175.pa.nsw.optusnet.com.au [49.195.157.175]) by mail105.syd.optusnet.com.au (Postfix) with ESMTPS id 3E9873A45A1; Wed, 29 Apr 2020 08:02:33 +1000 (AEST) Received: from dave by dread.disaster.area with local (Exim 4.92.3) (envelope-from ) id 1jTYJE-0008Uv-5w; Wed, 29 Apr 2020 08:02:32 +1000 Date: Wed, 29 Apr 2020 08:02:32 +1000 From: Dave Chinner To: "Darrick J. Wong" Subject: Re: =?utf-8?B?5Zue5aSNOiBSZQ==?= =?utf-8?Q?=3A?= [RFC PATCH 0/8] dax: Add a dax-rmap tree to support reflink Message-ID: <20200428220232.GI2040@dread.disaster.area> References: <20200427084750.136031-1-ruansy.fnst@cn.fujitsu.com> <20200427122836.GD29705@bombadil.infradead.org> <20200428064318.GG2040@dread.disaster.area> <259fe633-e1ff-b279-cd8c-1a81eaa40941@cn.fujitsu.com> <20200428111636.GK29705@bombadil.infradead.org> <20200428112441.GH2040@dread.disaster.area> <20200428153732.GZ6742@magnolia> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20200428153732.GZ6742@magnolia> User-Agent: Mutt/1.10.1 (2018-07-13) X-Optus-CM-Score: 0 X-Optus-CM-Analysis: v=2.3 cv=QIgWuTDL c=1 sm=1 tr=0 a=ONQRW0k9raierNYdzxQi9Q==:117 a=ONQRW0k9raierNYdzxQi9Q==:17 a=IkcTkHD0fZMA:10 a=cl8xLZFz6L8A:10 a=5KLPUuaC_9wA:10 a=JfrnYn6hAAAA:8 a=7-415B0cAAAA:8 a=l6wd5GMc4HtCNSAcdtkA:9 a=z4jTvAT5gXS7p1mQ:21 a=_k9EnfUi_P5Muxk2:21 a=QEXdDO2ut3YA:10 a=1CNFftbPRP8L7MoqJWF3:22 a=biEYGPWJfzWAr4FL6Ov7:22 Message-ID-Hash: KHZWDTOFHTNCIRK6OZET6XEH4PD7VMBL X-Message-ID-Hash: KHZWDTOFHTNCIRK6OZET6XEH4PD7VMBL X-MailFrom: david@fromorbit.com X-Mailman-Rule-Hits: nonmember-moderation X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; emergency; loop; banned-address; member-moderation CC: Matthew Wilcox , "linux-kernel@vger.kernel.org" , "linux-xfs@vger.kernel.org" , "linux-nvdimm@lists.01.org" , "linux-mm@kvack.org" , "linux-fsdevel@vger.kernel.org" , "hch@lst.de" , "rgoldwyn@suse.de" , "Qi, Fuli" , "Gotou, Yasunori" X-Mailman-Version: 3.1.1 Precedence: list List-Id: "Linux-nvdimm developer list." Archived-At: List-Archive: List-Help: List-Post: List-Subscribe: List-Unsubscribe: Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 T24gVHVlLCBBcHIgMjgsIDIwMjAgYXQgMDg6Mzc6MzJBTSAtMDcwMCwgRGFycmljayBKLiBXb25n IHdyb3RlOg0KPiBPbiBUdWUsIEFwciAyOCwgMjAyMCBhdCAwOToyNDo0MVBNICsxMDAwLCBEYXZl IENoaW5uZXIgd3JvdGU6DQo+ID4gT24gVHVlLCBBcHIgMjgsIDIwMjAgYXQgMDQ6MTY6MzZBTSAt MDcwMCwgTWF0dGhldyBXaWxjb3ggd3JvdGU6DQo+ID4gPiBPbiBUdWUsIEFwciAyOCwgMjAyMCBh dCAwNTozMjo0MVBNICswODAwLCBSdWFuIFNoaXlhbmcgd3JvdGU6DQo+ID4gPiA+IE9uIDIwMjAv NC8yOCDkuIvljYgyOjQzLCBEYXZlIENoaW5uZXIgd3JvdGU6DQo+ID4gPiA+ID4gT24gVHVlLCBB cHIgMjgsIDIwMjAgYXQgMDY6MDk6NDdBTSArMDAwMCwgUnVhbiwgU2hpeWFuZyB3cm90ZToNCj4g PiA+ID4gPiA+IOWcqCAyMDIwLzQvMjcgMjA6Mjg6MzYsICJNYXR0aGV3IFdpbGNveCIgPHdpbGx5 QGluZnJhZGVhZC5vcmc+IOWGmemBkzoNCj4gPiA+ID4gPiA+ID4gT24gTW9uLCBBcHIgMjcsIDIw MjAgYXQgMDQ6NDc6NDJQTSArMDgwMCwgU2hpeWFuZyBSdWFuIHdyb3RlOg0KPiA+ID4gPiA+ID4g PiA+ICAgVGhpcyBwYXRjaHNldCBpcyBhIHRyeSB0byByZXNvbHZlIHRoZSBzaGFyZWQgJ3BhZ2Ug Y2FjaGUnIHByb2JsZW0gZm9yDQo+ID4gPiA+ID4gPiA+ID4gICBmc2RheC4NCj4gPiA+ID4gPiA+ ID4gPiANCj4gPiA+ID4gPiA+ID4gPiAgIEluIG9yZGVyIHRvIHRyYWNrIG11bHRpcGxlIG1hcHBp bmdzIGFuZCBpbmRleGVzIG9uIG9uZSBwYWdlLCBJDQo+ID4gPiA+ID4gPiA+ID4gICBpbnRyb2R1 Y2VkIGEgZGF4LXJtYXAgcmItdHJlZSB0byBtYW5hZ2UgdGhlIHJlbGF0aW9uc2hpcC4gIEEgZGF4 IGVudHJ5DQo+ID4gPiA+ID4gPiA+ID4gICB3aWxsIGJlIGFzc29jaWF0ZWQgbW9yZSB0aGFuIG9u Y2UgaWYgaXMgc2hhcmVkLiAgQXQgdGhlIHNlY29uZCB0aW1lIHdlDQo+ID4gPiA+ID4gPiA+ID4g ICBhc3NvY2lhdGUgdGhpcyBlbnRyeSwgd2UgY3JlYXRlIHRoaXMgcmItdHJlZSBhbmQgc3RvcmUg aXRzIHJvb3QgaW4NCj4gPiA+ID4gPiA+ID4gPiAgIHBhZ2UtPnByaXZhdGUobm90IHVzZWQgaW4g ZnNkYXgpLiAgSW5zZXJ0ICgtPm1hcHBpbmcsIC0+aW5kZXgpIHdoZW4NCj4gPiA+ID4gPiA+ID4g PiAgIGRheF9hc3NvY2lhdGVfZW50cnkoKSBhbmQgZGVsZXRlIGl0IHdoZW4gZGF4X2Rpc2Fzc29j aWF0ZV9lbnRyeSgpLg0KPiA+ID4gPiA+ID4gPiANCj4gPiA+ID4gPiA+ID4gRG8gd2UgcmVhbGx5 IHdhbnQgdG8gdHJhY2sgYWxsIG9mIHRoaXMgb24gYSBwZXItcGFnZSBiYXNpcz8gIEkgd291bGQN Cj4gPiA+ID4gPiA+ID4gaGF2ZSB0aG91Z2h0IGEgcGVyLWV4dGVudCBiYXNpcyB3YXMgbW9yZSB1 c2VmdWwuICBFc3NlbnRpYWxseSwgY3JlYXRlDQo+ID4gPiA+ID4gPiA+IGEgbmV3IGFkZHJlc3Nf c3BhY2UgZm9yIGVhY2ggc2hhcmVkIGV4dGVudC4gIFBlciBwYWdlIGp1c3Qgc2VlbXMgbGlrZQ0K PiA+ID4gPiA+ID4gPiBhIGh1Z2Ugb3ZlcmhlYWQuDQo+ID4gPiA+ID4gPiA+IA0KPiA+ID4gPiA+ ID4gUGVyLWV4dGVudCB0cmFja2luZyBpcyBhIG5pY2UgaWRlYSBmb3IgbWUuICBJIGhhdmVuJ3Qg dGhvdWdodCBvZiBpdA0KPiA+ID4gPiA+ID4geWV0Li4uDQo+ID4gPiA+ID4gPiANCj4gPiA+ID4g PiA+IEJ1dCB0aGUgZXh0ZW50IGluZm8gaXMgbWFpbnRhaW5lZCBieSBmaWxlc3lzdGVtLiAgSSB0 aGluayB3ZSBuZWVkIGEgd2F5DQo+ID4gPiA+ID4gPiB0byBvYnRhaW4gdGhpcyBpbmZvIGZyb20g RlMgd2hlbiBhc3NvY2lhdGluZyBhIHBhZ2UuICBNYXkgYmUgYSBiaXQNCj4gPiA+ID4gPiA+IGNv bXBsaWNhdGVkLiAgTGV0IG1lIHRoaW5rIGFib3V0IGl0Li4uDQo+ID4gPiA+ID4gDQo+ID4gPiA+ ID4gVGhhdCdzIHdoeSBJIHdhbnQgdGhlIC11c2VyIG9mIHRoaXMgYXNzb2NpYXRpb24tIHRvIGRv IGEgZmlsZXN5c3RlbQ0KPiA+ID4gPiA+IGNhbGxvdXQgaW5zdGVhZCBvZiBrZWVwaW5nIGl0J3Mg b3duIG5haXZlIHRyYWNraW5nIGluZnJhc3RydWN0dXJlLg0KPiA+ID4gPiA+IFRoZSBmaWxlc3lz dGVtIGNhbiBkbyBhbiBlZmZpY2llbnQsIG9uLWRlbWFuZCByZXZlcnNlIG1hcHBpbmcgbG9va3Vw DQo+ID4gPiA+ID4gZnJvbSBpdCdzIG93biBleHRlbnQgdHJhY2tpbmcgaW5mcmFzdHJ1Y3R1cmUs IGFuZCB0aGVyZSdzIHplcm8NCj4gPiA+ID4gPiBydW50aW1lIG92ZXJoZWFkIHdoZW4gdGhlcmUg YXJlIG5vIGVycm9ycyBwcmVzZW50Lg0KPiA+ID4gPiA+IA0KPiA+ID4gPiA+IEF0IHRoZSBtb21l bnQsIHRoaXMgImRheCBhc3NvY2lhdGlvbiIgaXMgdXNlZCB0byAicmVwb3J0IiBhIHN0b3JhZ2UN Cj4gPiA+ID4gPiBtZWRpYSBlcnJvciBkaXJlY3RseSB0byB1c2Vyc3BhY2UuIEkgc2F5ICJyZXBv cnQiIGJlY2F1c2Ugd2hhdCBpdA0KPiA+ID4gPiA+IGRvZXMgaXMga2lsbCB1c2Vyc3BhY2UgcHJv Y2Vzc2VzIGRlYWQuIFRoZSBzdG9yYWdlIG1lZGlhIGVycm9yDQo+ID4gPiA+ID4gYWN0dWFsbHkg bmVlZHMgdG8gYmUgcmVwb3J0ZWQgdG8gdGhlIG93bmVyIG9mIHRoZSBzdG9yYWdlIG1lZGlhLA0K PiA+ID4gPiA+IHdoaWNoIGluIHRoZSBjYXNlIG9mIEZTLURBWCBpcyB0aGUgZmlsZXN5dGVtLg0K PiA+ID4gPiANCj4gPiA+ID4gVW5kZXJzdG9vZC4NCj4gPiA+ID4gDQo+ID4gPiA+IEJUVywgdGhp cyBpcyB0aGUgdXNhZ2UgaW4gbWVtb3J5LWZhaWx1cmUsIHNvIHdoYXQgYWJvdXQgcm1hcD8gIEkg aGF2ZSBub3QNCj4gPiA+ID4gZm91bmQgaG93IHRvIHVzZSB0aGlzIHRyYWNraW5nIGluIHJtYXAu ICBEbyB5b3UgaGF2ZSBhbnkgaWRlYXM/DQo+ID4gPiA+IA0KPiA+ID4gPiA+IA0KPiA+ID4gPiA+ IFRoYXQgd2F5IHRoZSBmaWxlc3lzdGVtIGNhbiB0aGVuIGxvb2sgdXAgYWxsIHRoZSBvd25lcnMg b2YgdGhhdCBiYWQNCj4gPiA+ID4gPiBtZWRpYSByYW5nZSAoaS5lLiB0aGUgZmlsZXN5c3RlbSBi bG9jayBpdCBjb3JyZXNwb25kcyB0bykgYW5kIHRha2UNCj4gPiA+ID4gPiBhcHByb3ByaWF0ZSBh Y3Rpb24uIGUuZy4NCj4gPiA+ID4gDQo+ID4gPiA+IEkgdHJpZWQgd3JpdGluZyBhIGZ1bmN0aW9u IHRvIGxvb2sgdXAgYWxsIHRoZSBvd25lcnMnIGluZm8gb2Ygb25lIGJsb2NrIGluDQo+ID4gPiA+ IHhmcyBmb3IgbWVtb3J5LWZhaWx1cmUgdXNlLiAgSXQgd2FzIGRyb3BwZWQgaW4gdGhpcyBwYXRj aHNldCBiZWNhdXNlIEkgZm91bmQNCj4gPiA+ID4gb3V0IHRoYXQgdGhpcyBsb29rdXAgZnVuY3Rp b24gbmVlZHMgJ3JtYXBidCcgdG8gYmUgZW5hYmxlZCB3aGVuIG1rZnMuICBCdXQNCj4gPiA+ID4g YnkgZGVmYXVsdCwgcm1hcGJ0IGlzIGRpc2FibGVkLiAgSSBhbSBub3Qgc3VyZSBpZiBpdCBtYXR0 ZXJzLi4uDQo+ID4gPiANCj4gPiA+IEknbSBwcmV0dHkgc3VyZSB5b3UgY2FuJ3QgaGF2ZSBzaGFy ZWQgZXh0ZW50cyBvbiBhbiBYRlMgZmlsZXN5c3RlbSBpZiB5b3UNCj4gPiA+IF9kb24ndF8gaGF2 ZSB0aGUgcm1hcGJ0IGZlYXR1cmUgZW5hYmxlZC4gIEkgbWVhbiwgdGhhdCdzIHdoeSBpdCBleGlz dHMuDQo+ID4gDQo+ID4gWW91J3JlIGNvbmZ1c2luZyByZWZsaW5rIHdpdGggcm1hcC4gOikNCj4g PiANCj4gPiBybWFwYnQgZG9lcyBhbGwgdGhlIHJldmVyc2UgbWFwcGluZyB0cmFja2luZywgcmVm bGluayBqdXN0IGRvZXMgdGhlDQo+ID4gc2hhcmVkIGRhdGEgZXh0ZW50IHRyYWNraW5nLg0KPiA+ IA0KPiA+IEJ1dCBnaXZlbiB0aGF0IGFueW9uZSB3aG8gd2FudHMgdG8gdXNlIERBWCB3aXRoIHJl ZmxpbmsgaXMgZ29pbmcgdG8NCj4gPiBoYXZlIHRvIG1rZnMgdGhlaXIgZmlsZXN5c3RlbSBhbnl3 YXkgKHRvIHR1cm4gb24gcmVmbGluaykgcmVxdWlyaW5nDQo+ID4gdGhhdCBybWFwYnQgaXMgYWxz byB0dXJuZWQgb24gaXMgbm90IGEgYmlnIGRlYWwuIEVzcGVjaWFsbHkgYXMgd2UNCj4gPiBjYW4g Y2hlY2sgaXQgYXQgbW91bnQgdGltZSBpbiB0aGUga2VybmVsLi4uDQo+IA0KPiBBcmUgd2UgZ29p bmcgdG8gdHVybiBvbiBybWFwIGJ5IGRlZmF1bHQ/ICBUaGUgbGFzdCBJIGNoZWNrZWQsIGl0IGRp ZA0KPiBoYXZlIGEgMTAtMjAlIHBlcmZvcm1hbmNlIGNvc3Qgb24gZXh0cmVtZSBtZXRhZGF0YS1o ZWF2eSB3b3JrbG9hZHMuDQo+IE9yIGRvIHdlIG9ubHkgZW5hYmxlIGl0IGJ5IGRlZmF1bHQgaWYg bWtmcyBkZXRlY3RzIGEgcG1lbSBkZXZpY2U/DQoNCkp1c3QgaGF2ZSB0aGUga2VybmVsIHJlZnVz ZSB0byBtb3VudCBhIHJlZmxpbmsgZW5hYmxlZCBmaWxlc3lzdGVtIG9uDQphIERBWCBjYXBhYmxl IGRldmljZSB1bmxlc3MgLW8gZGF4PW5ldmVyIG9yIHJtYXBidCBpcyBlbmFibGVkLg0KDQpUaGF0 J2xsIGdldCB0aGUgbWVzc2FnZSBhY3Jvc3MgcHJldHR5IHF1aWNrbHkuLi4uDQoNCj4gKEFkbWl0 dGVkbHksIG1vc3QgcGVvcGxlIGRvIG5vdCBydW4gZnN4IGFzIGEgcHJvZHVjdGl2aXR5IGFwcDsg dGhlDQo+IG5vcm1hbCBoaXQgaXMgdXN1YWxseSAzLTUlIHdoaWNoIG1pZ2h0IG5vdCBiZSBzdWNo IGEgYmlnIGRlYWwgc2luY2UgeW91DQo+IGFsc28gZ2V0IChoYWxmIG9mKSBvbmxpbmUgZnNjay4g OlApDQoNCkkgaGF2ZSBub3Qgbm90aWNlZCB0aGUgb3ZlcmhlYWQgYXQgYWxsIG9uIGFueSBvZiBt eSBwcm9kdWN0aW9uDQptYWNoaW5lcyBzaW5jZSBJIGVuYWJsZWQgaXQgd2F5IG9uIGFsbCBvZiB0 aGVtIHdheSBiYWNrIHdoZW4uLi4uDQoNCkFuZCwgcmVhbGx5LCBwbWVtIGlzIGEgX3ZlcnkgcG9v ciBjaG9pY2VfIGZvciBtZXRhZGF0YSBpbnRlbnNpdmUNCmFwcGxpY2F0aW9ucyBvbiBYRlMgYXMg cG1lbSBpcyBjb21wbGV0ZWx5IHN5bmNocm9ub3VzLiAgWEZTIGhhcyBhbg0KYXN5bmMgSU8gbW9k ZWwgZm9yIGl0J3MgbWV0YWRhdGEgdGhhdCAqbXVzdCogYmUgYnVmZmVyZWQgKHNvIG5vDQpEQVgh KSBhbmQgdGhlIHN5bmNocm9ub3VzIG5hdHVyZSBvZiBwbWVtIGNvbXBsZXRlbHkgZGVmZWF0cyB0 aGUNCmFyY2hpdGVjdHVyYWwgSU8gcGlwZWxpbmluZyBYRlMgdXNlcyB0byBhbGxvdyB0aG91c2Fu ZHMgb2YNCmNvbmN1cnJlbnQgbWV0YWRhdGEgSU9zIGluIGZsaWdodC4gT1RPSCwgcG1lbSBJTyBk ZXB0aCBpcyBsaW1pdGVkIHRvDQp0aGUgbnVtYmVyIG9mIENQVXMgdGhhdCBhcmUgY29uY3VycmVu dGx5IGlzc3VpbmcgSU8sIHNvIGl0IHJlYWxseSwNCnJlYWxseSBzdWNrcyBjb21wYXJlZCB0byBh IGhhbmRmdWwgb2YgaGlnaCBlbmQgbnZtZSBTU0RzIG9uIFBDSWUNCjQuMC4uLi4NCg0KU28gd2l0 aCB0aGF0IGluIG1pbmQsIEkgc2VlIGxpdHRsZSByZWFzb24gdG8gY2FyZSBhYm91dCB0aGUgc21h bGwNCmFkZGl0aW9uYWwgb3ZlcmhlYWQgb2Ygcm1hcGJ0IG9uIEZTLURBWCBpbnN0YWxsYXRpb25z IHRoYXQgcmVxdWlyZQ0KcmVmbGluay4uLg0KDQpDaGVlcnMsDQoNCkRhdmUuDQotLSANCkRhdmUg Q2hpbm5lcg0KZGF2aWRAZnJvbW9yYml0LmNvbQpfX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fXwpMaW51eC1udmRpbW0gbWFpbGluZyBsaXN0IC0tIGxpbnV4LW52 ZGltbUBsaXN0cy4wMS5vcmcKVG8gdW5zdWJzY3JpYmUgc2VuZCBhbiBlbWFpbCB0byBsaW51eC1u dmRpbW0tbGVhdmVAbGlzdHMuMDEub3JnCg==