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=-0.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 81371CA9ED3 for ; Tue, 5 Nov 2019 02:29:47 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 35AAF214E0 for ; Tue, 5 Nov 2019 02:29:47 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="Y1OM1AnD" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 35AAF214E0 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id C5DAA6B0006; Mon, 4 Nov 2019 21:29:46 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id C36226B0007; Mon, 4 Nov 2019 21:29:46 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id B23A66B0008; Mon, 4 Nov 2019 21:29:46 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0143.hostedemail.com [216.40.44.143]) by kanga.kvack.org (Postfix) with ESMTP id 9C9CD6B0006 for ; Mon, 4 Nov 2019 21:29:46 -0500 (EST) Received: from smtpin28.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay05.hostedemail.com (Postfix) with SMTP id 63F97181AEF09 for ; Tue, 5 Nov 2019 02:29:46 +0000 (UTC) X-FDA: 76120643172.28.clock11_8f771e4703508 X-HE-Tag: clock11_8f771e4703508 X-Filterd-Recvd-Size: 6390 Received: from mail-wr1-f68.google.com (mail-wr1-f68.google.com [209.85.221.68]) by imf22.hostedemail.com (Postfix) with ESMTP for ; Tue, 5 Nov 2019 02:29:45 +0000 (UTC) Received: by mail-wr1-f68.google.com with SMTP id a15so19438869wrf.9 for ; Mon, 04 Nov 2019 18:29:45 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=date:from:to:cc:subject:references:mime-version:message-id :content-transfer-encoding; bh=PdCxIC9kgvzitGViQuvGUCEVY1YRU/tDisQccY12nsw=; b=Y1OM1AnD545zdg0YBT3OVjAJ5W11si9KQcoAEhSUgr1gSrSyO8vq/N22MFRJvshMh+ rFLHD4NcgYIlKz2zuuQLK4mKnfiUAjem8ZJSNUdFd7QuftTmHI2GRCKIa2Yd0F3Z+fgO dLTWvalY0U7SO59EWwIJSiSg8khxAvDVoDwFjCI4Zbvz5kqATo6/4FV3vq7Ff4v3WJOX eMAjKwnB7A/II6gcNJpxnW1OSLgzNzroy+PBdWaE9v3AtUyTrap2+vw9mnNQLWluUJZS D/vj4R1AWWelqEUAZcjgt2MSRnfxdeZzaSLTcC23bVtBm8a8cCHT3VGow9LApH0I9kNv wLcg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:references:mime-version :message-id:content-transfer-encoding; bh=PdCxIC9kgvzitGViQuvGUCEVY1YRU/tDisQccY12nsw=; b=f9MLQopyy+BZ9X3Lunqy4o6mXt3xgtuVCcHll73zr/yWrhszgleyqD4d0B+0RwZ+xi zWC4QuZrtSaRgwYI+gXk6iMZTf/K77cJDyxs675BUEzR7f+g6xIaupHSuDqzJBl683Ez KnJiNTtEPuAk070qmo80QI0vpry8dfuWvDlEX6aqKK2dsBwRAnHyMT4nC76RWZaKLe98 eez2kcy8f9P6qZmYS0wijvIhpBh8tjscOsaaO5z/1+hbHTdJcC9Sj7SjrNUXR8WgqekL 42TNHqRgJ0GbeeEzDGt83uK7YT82cDpYOGmhN2RzM/3zbyur3JWwATmqub/1Ql/am7kI kAjg== X-Gm-Message-State: APjAAAXYm2zt/pMpcC/6NTuTrFnUAbofVohjQYLtAvs9EzDMOgTi95BL PMlAmWK2CD3inalvNSNsmrk= X-Google-Smtp-Source: APXvYqz1nzi7gaNWbZ4tnvSfntJCjHyjZtBNaPJIWWzm5C1eTgmyu60wFEjaYFZE0AzXmFsM29XT8A== X-Received: by 2002:a05:6000:1181:: with SMTP id g1mr3898956wrx.131.1572920984576; Mon, 04 Nov 2019 18:29:44 -0800 (PST) Received: from N-20L6PF1KTYA2 ([131.228.2.21]) by smtp.gmail.com with ESMTPSA id l2sm17632205wrt.15.2019.11.04.18.29.42 (version=TLS1_2 cipher=AES128-GCM-SHA256 bits=128/128); Mon, 04 Nov 2019 18:29:44 -0800 (PST) Date: Tue, 5 Nov 2019 10:29:41 +0800 From: "Li Xinhai" To: "Michal Hocko" , akpm Cc: "linux-mm@kvack.org" , "Vlastimil Babka" , "linux-kernel@vger.kernel.org" , "Linux API" , "Hugh Dickins" , linux-man Subject: Re: [PATCH v2] mm: Fix checking unmapped holes for mbind References: <201910291756045288126@gmail.com>, <20191030210836.a17c0649354b59961903d1a8@linux-foundation.org>, <20191031112609.GG13102@dhcp22.suse.cz> X-Priority: 3 X-GUID: D47CCF3B-5C3D-42F7-A13F-43E0513E99E0 X-Has-Attach: no X-Mailer: Foxmail 7.2.13.365[cn] Mime-Version: 1.0 Message-ID: <2019110510294042190833@gmail.com> Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: T24gMjAxOS0xMC0zMcKgYXQgMTk6MjbCoE1pY2hhbCBIb2Nrb8Kgd3JvdGU6Cj5PbiBXZWQgMzAt MTAtMTkgMjE6MDg6MzYsIEFuZHJldyBNb3J0b24gd3JvdGU6Cj4+IChjYyBsaW51eC1tYW5Admdl ci5rZXJuZWwub3JnKQo+Pgo+PiBPbiBUdWUsIDI5IE9jdCAyMDE5IDE3OjU2OjA2ICswODAwICJM aSBYaW5oYWkiIDxsaXhpbmhhaS5seGhAZ21haWwuY29tPiB3cm90ZToKPj4KPj4gPiBxdWV1ZV9w YWdlc19yYW5nZSgpIHdpbGwgY2hlY2sgZm9yIHVubWFwcGVkIGhvbGVzIGJlc2lkZXMgcXVldWUg cGFnZXMgZm9yCj4+ID4gbWlncmF0aW9uLiBUaGUgcnVsZXMgZm9yIGNoZWNraW5nIHVubWFwcGVk IGhvbGVzIGFyZToKPj4gPiAxIFVubWFwcGVkIGhvbGVzIGF0IGFueSBwYXJ0IG9mIHRoZSBzcGVj aWZpZWQgcmFuZ2Ugc2hvdWxkIGJlIHJlcG9ydGVkIGFzCj4+ID4gwqAgRUZBVUxUIGlmIG1iaW5k KCkgZm9yIG5vbmUgTVBPTF9ERUZBVUxUIGNhc2VzOwo+PiA+IDIgVW5tYXBwZWQgaG9sZXMgYXQg YW55IHBhcnQgb2YgdGhlIHNwZWNpZmllZCByYW5nZSBzaG91bGQgYmUgaWdub3JlZCBpZgo+PiA+ IMKgIG1iaW5kKCkgZm9yIE1QT0xfREVGQVVMVCBjYXNlOwo+PiA+IE5vdGUgdGhhdCB0aGUgc2Vj b25kIHJ1bGUgaXMgdGhlIGN1cnJlbnQgaW1wbGVtZW50YXRpb24sIGJ1dCBpdCBzZWVtcwo+PiA+ IGNvbmZsaWN0cyB0aGUgTGludXggQVBJIGRlZmluaXRpb24uCj4+Cj4+IENhbiB5b3UgcXVvdGUg dGhlIHBhcnQgb2YgdGhlIEFQSSBkZWZpbml0aW9uIHdoaWNoIHlvdSdyZSBsb29raW5nIGF0Pwo+ Pgo+PiBNeSBtYmluZCgyKSBtYW5wYWdlIHNheXMKPj4KPj4gRVJST1JTCj4+wqDCoMKgwqDCoMKg wqAgRUZBVUxUIFBhcnQgb3IgYWxsIG9mIHRoZSBtZW1vcnkgcmFuZ2Ugc3BlY2lmaWVkIGJ5IG5v ZGVtYXNrIGFuZCBtYXhuLQo+PsKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqAgb2RlIHBvaW50 cyBvdXRzaWRlIHlvdXIgYWNjZXNzaWJsZSBhZGRyZXNzIHNwYWNlLsKgIE9yLCB0aGVyZSB3YXMK Pj7CoMKgwqDCoMKgwqDCoMKgwqDCoMKgwqDCoMKgIGFuIHVubWFwcGVkIGhvbGUgaW4gdGhlIHNw ZWNpZmllZCBtZW1vcnkgcmFuZ2Ugc3BlY2lmaWVkIGJ5IGFkZHIKPj7CoMKgwqDCoMKgwqDCoMKg wqDCoMKgwqDCoMKgIGFuZCBsZW4uCj4+Cj4+IChJIGFzc3VtZSB0aGUgZmlyc3Qgc2VudGVuY2Ug bWVhbnQgdG8gc2F5ICJzcGVjaWZpZWQgYnkgYWRkciBhbmQgbGVuIikKPgo+TXkgdW5kZXJzdGFu ZGluZyBpcyB0aGF0IHRoaXMgcmVhbGx5IHJlZmVycyB0byBhcmVhIHBvaW50ZWQgdG8gYnkgbm9k ZW1hc2suCj5CdHcuIHdoeSB0aGVyZSBpcyBhbnkgc3BlY2lhbCBjYXNpbmcgYXJvdW5kIHRoZSB1 bm1hcHBlZCBob2xlcyB3aXRoIHRoZQo+YWRkcmVzcyBzcGFjZSByYW5nZT8gVGhpcyBsb29rcyBs aWtlIGFuIGFudGlwYXR0ZXJuIHRvIG90aGVyIGFkZHJlc3MKPnNwYWNlIG9wZXJhdGlvbnMgdG8g bWUuIEUuZy4gbXVubWFwIHNpbXBseSB1bm1hcHMgYWxsIGV4aXN0aW5nIHZtYXMgaW4KPnRoZSBn aXZlbiByYW5nZSwgbXByb3RlY3QsIG1hZHZpc2UgZXRjLiBiZWhhdmUgdGhlIHNhbWUuCj4KPlNv IG15IHF1ZXN0aW9uIGlzLCBkbyB3ZSB3YW50IHRvIHJlbW92ZSB0aGF0IHdlaXJkIHJlc3RyaWN0 aW9uIGFuZAo+c2ltcGx5IGFjdCBvbiBhbGwgZXhpc3RpbmcgVk1BcyBpbiB0aGUgcmFuZ2U/IFRo ZSBvbmx5IHNpdHVhdGlvbiB0aGlzCj5jb3VsZCByZWdyZXNzIHdvdWxkIGJlIGlmIHNvbWVib2R5 IHVzZWQgbWJpbmQgdG8gcHJvYmUgZm9yIGV4aXN0aW5nIFZNQXMKPmFuZCB0aGF0IHNvdW5kcyBh IG1vcmUgdGhhbiBzZW5zaWJsZSB0byBtZS4gT3IgYW0gSSBtaXNzaW5nIGFueXRoaW5nPwo+LS0K Pk1pY2hhbCBIb2Nrbwo+U1VTRSBMYWJzIAoKeWVzLCBtYmluZCgpIGNhcmUgYWJvdXQgdGhlIHVu bWFwcGVkIGhvbGVzIGZvcsKgbm9uIE1QT0xfREVGQVVMVCBjYXNlcywgYnV0IApvdGhlciBvcGVy YXRpb25zIGRvbid0IGNhcmUgdGhvc2UgaG9sZXMuIEl0IHNlZW1zIG5vIGNsdWVzIGFib3V0IHdo eSB0aGF0IApyZXN0cmljdGlvbiB3YXMgZGVjaWRlZC4KCkF0IHByZXNlbnQsIGlmIGl0IGlzIGhh cmQgdG8gZGVjaWRlIHRvIHJlbW92ZSB0aGlzIHJlc3RyaWN0aW9uLCB3ZSBtYXkga2VlcCB0aGUg CmN1cnJlbnQgYmVoYXZpb3IuIE5ldyBwYXRjaCBwb3N0ZWQgZm9yIHRoaXMgcHVycG9zZSwgwqAK IltQQVRDSCB2M10gbW06IEZpeCBjaGVja2luZyB1bm1hcHBlZCBob2xlcyBmb3IgbWJpbmQiLgpU aGFua3MuCgpYaW5oYWkKCgo=