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=-8.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, USER_AGENT_SANE_1 autolearn=ham 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 9F141CA9EC3 for ; Thu, 31 Oct 2019 09:05:49 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (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 78EF22083E for ; Thu, 31 Oct 2019 09:05:49 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 78EF22083E Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=nvidia.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 8ABC76EBF9; Thu, 31 Oct 2019 09:05:44 +0000 (UTC) Received: from hqemgate14.nvidia.com (hqemgate14.nvidia.com [216.228.121.143]) by gabe.freedesktop.org (Postfix) with ESMTPS id DC58B6EBB6 for ; Wed, 30 Oct 2019 23:05:23 +0000 (UTC) Received: from hqpgpgate102.nvidia.com (Not Verified[216.228.121.13]) by hqemgate14.nvidia.com (using TLS: TLSv1.2, DES-CBC3-SHA) id ; Wed, 30 Oct 2019 16:05:29 -0700 Received: from hqmail.nvidia.com ([172.20.161.6]) by hqpgpgate102.nvidia.com (PGP Universal service); Wed, 30 Oct 2019 16:05:23 -0700 X-PGP-Universal: processed; by hqpgpgate102.nvidia.com on Wed, 30 Oct 2019 16:05:23 -0700 Received: from [10.110.48.28] (10.124.1.5) by HQMAIL107.nvidia.com (172.20.187.13) with Microsoft SMTP Server (TLS) id 15.0.1473.3; Wed, 30 Oct 2019 23:05:22 +0000 Subject: Re: [PATCH 14/19] vfio, mm: pin_longterm_pages (FOLL_PIN) and put_user_page() conversion To: Andrew Morton References: <20191030224930.3990755-1-jhubbard@nvidia.com> <20191030224930.3990755-15-jhubbard@nvidia.com> From: John Hubbard X-Nvconfidentiality: public Message-ID: Date: Wed, 30 Oct 2019 16:05:22 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.8.0 MIME-Version: 1.0 In-Reply-To: <20191030224930.3990755-15-jhubbard@nvidia.com> X-Originating-IP: [10.124.1.5] X-ClientProxiedBy: HQMAIL105.nvidia.com (172.20.187.12) To HQMAIL107.nvidia.com (172.20.187.13) Content-Language: en-US X-Mailman-Approved-At: Thu, 31 Oct 2019 09:04:21 +0000 X-Mailman-Original-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nvidia.com; s=n1; t=1572476729; bh=53l+EYxovXaJJmkDDYPwp5PBwN0eKGoaifL7qKM0Mds=; h=X-PGP-Universal:Subject:To:CC:References:From:X-Nvconfidentiality: Message-ID:Date:User-Agent:MIME-Version:In-Reply-To: X-Originating-IP:X-ClientProxiedBy:Content-Type:Content-Language: Content-Transfer-Encoding; b=md/zgeBc2zml8TuAaTKRK2oyv1Btng0H6ozq8zn2sRJiXmTfxKbYsvkGcjK6gQS+q 3nPYnJq+1Eps5VG6ooIJSjGzkjOCMYIGUlSFcOJoUyjFNZ1H0vd+dWvWBSOqDkH5Uc dvFo63nthImmg9iCDmU6xj0EE8b8pgUM6g95EetFKN1/r0QnPl5BygVRpoyVLlCyiH iCMwhme/pZSwh1q5oOeHae8CYEOAkIwb1y6ebulV3/7WSgE5bb3SmwuYCg/xWfmbmX iPDY0K1xyswztlMvQmBw8+uJFpl2scC5scONZ/nlQeN+ZcWegNbDORlz6y4lLuTxuj WJ+vmX9yZfaww== X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Michal Hocko , Jan Kara , kvm@vger.kernel.org, linux-doc@vger.kernel.org, David Airlie , Dave Chinner , dri-devel@lists.freedesktop.org, LKML , linux-mm@kvack.org, Paul Mackerras , linux-kselftest@vger.kernel.org, Ira Weiny , Jonathan Corbet , linux-rdma@vger.kernel.org, Michael Ellerman , Christoph Hellwig , Jason Gunthorpe , Vlastimil Babka , =?UTF-8?B?QmrDtnJuIFTDtnBlbA==?= , linux-media@vger.kernel.org, Shuah Khan , linux-block@vger.kernel.org, =?UTF-8?B?SsOpcsO0bWUgR2xpc3Nl?= , Al Viro , Dan Williams , Mauro Carvalho Chehab , Magnus Karlsson , Jens Axboe , netdev@vger.kernel.org, Alex Williamson , linux-fsdevel@vger.kernel.org, bpf@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, "David S . Miller" , Mike Kravetz Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Message-ID: <20191030230522.FGqf08i0ro3QRN227Ah4hFpLuCPGJmJThqNehf3KYZw@z> T24gMTAvMzAvMTkgMzo0OSBQTSwgSm9obiBIdWJiYXJkIHdyb3RlOgo+IFRoaXMgYWxzbyBmaXhl cyBvbmUgb3IgdHdvIGxpa2VseSBidWdzLgoKV2VsbCwgYWN0dWFsbHkganVzdCBvbmUuLi4KCj4g Cj4gMS4gQ2hhbmdlIHZmaW8gZnJvbSBnZXRfdXNlcl9wYWdlcyhGT0xMX0xPTkdURVJNKSwgdG8K PiBwaW5fbG9uZ3Rlcm1fcGFnZXMoKSwgd2hpY2ggc2V0cyBib3RoIEZPTExfTE9OR1RFUk0gYW5k IEZPTExfUElOLgo+IAo+IE5vdGUgdGhhdCB0aGlzIGlzIGEgY2hhbmdlIGluIGJlaGF2aW9yLCBi ZWNhdXNlIHRoZQo+IGdldF91c2VyX3BhZ2VzX3JlbW90ZSgpIGNhbGwgd2FzIG5vdCBzZXR0aW5n IEZPTExfTE9OR1RFUk0sIGJ1dCB0aGUKPiBuZXcgcGluX3VzZXJfcGFnZXNfcmVtb3RlKCkgY2Fs bCB0aGF0IHJlcGxhY2VzIGl0LCAqaXMqIHNldHRpbmcKPiBGT0xMX0xPTkdURVJNLiBJdCBpcyBp bXBvcnRhbnQgdG8gc2V0IEZPTExfTE9OR1RFUk0sIGJlY2F1c2UgdGhlCj4gRE1BIGNhc2UgcmVx dWlyZXMgaXQuIFBsZWFzZSBzZWUgdGhlIEZPTExfUElOIGRvY3VtZW50YXRpb24gaW4KPiBpbmNs dWRlL2xpbnV4L21tLmgsIGFuZCBEb2N1bWVudGF0aW9uL3Bpbl91c2VyX3BhZ2VzLnJzdCBmb3Ig ZGV0YWlscy4KCkNvcnJlY3Rpb246IHRoZSBhYm92ZSBjb21tZW50IGlzIHN0YWxlIGFuZCB3cm9u Zy4gSSB3cm90ZSBpdCBiZWZvcmUgCmdldHRpbmcgZnVydGhlciBpbnRvIHRoZSBkZXRhaWxzLCBh bmQgdGhlIHBhdGNoIGRvZXNuJ3QgZG8gdGhpcy4gCgpJbnN0ZWFkLCBpdCBrZWVwcyBleGFjdGx5 IHRoZSBvbGQgYmVoYXZpb3I6IHBpbl9sb25ndGVybV9wYWdlc19yZW1vdGUoKQppcyBjYXJlZnVs IHRvIGF2b2lkIHNldHRpbmcgRk9MTF9MT05HVEVSTS4gSW5zdGVhZCBvZiBzZXR0aW5nIHRoYXQg ZmxhZywKaXQgZHJvcHMgaW4gYSAiVE9ETyIgY29tbWVudCBuZWFyYnkuIDopCgpJJ2xsIHVwZGF0 ZSB0aGUgY29tbWl0IGRlc2NyaXB0aW9uIGluIHRoZSBuZXh0IHZlcnNpb24gb2YgdGhlIHNlcmll cy4KCgp0aGFua3MsCgpKb2huIEh1YmJhcmQKTlZJRElBCgo+IAo+IDIuIEJlY2F1c2UgYWxsIEZP TExfUElOLWFjcXVpcmVkIHBhZ2VzIG11c3QgYmUgcmVsZWFzZWQgdmlhCj4gcHV0X3VzZXJfcGFn ZSgpLCBhbHNvIGNvbnZlcnQgdGhlIHB1dF9wYWdlKCkgY2FsbCBvdmVyIHRvCj4gcHV0X3VzZXJf cGFnZXMoKS4KPiAKPiBOb3RlIHRoYXQgdGhpcyBlZmZlY3RpdmVseSBjaGFuZ2VzIHRoZSBjb2Rl J3MgYmVoYXZpb3IgaW4KPiB2ZmlvX2lvbW11X3R5cGUxLmM6IHB1dF9wZm4oKTogaXQgbm93IHVs dGltYXRlbHkgY2FsbHMKPiBzZXRfcGFnZV9kaXJ0eV9sb2NrKCksIGluc3RlYWQgb2Ygc2V0X3Bh Z2VfZGlydHkoKS4gVGhpcyBpcwo+IHByb2JhYmx5IG1vcmUgYWNjdXJhdGUuCj4gCj4gQXMgQ2hy aXN0b3BoIEhlbGx3aWcgcHV0IGl0LCAic2V0X3BhZ2VfZGlydHkoKSBpcyBvbmx5IHNhZmUgaWYg d2UgYXJlCj4gZGVhbGluZyB3aXRoIGEgZmlsZSBiYWNrZWQgcGFnZSB3aGVyZSB3ZSBoYXZlIHJl ZmVyZW5jZSBvbiB0aGUgaW5vZGUgaXQKPiBoYW5ncyBvZmYuIiBbMV0KPiAKPiBbMV0gaHR0cHM6 Ly9sb3JlLmtlcm5lbC5vcmcvci8yMDE5MDcyMzE1MzY0MC5HQjcyMEBsc3QuZGUKPiAKPiBDYzog QWxleCBXaWxsaWFtc29uIDxhbGV4LndpbGxpYW1zb25AcmVkaGF0LmNvbT4KPiBTaWduZWQtb2Zm LWJ5OiBKb2huIEh1YmJhcmQgPGpodWJiYXJkQG52aWRpYS5jb20+Cj4gLS0tCj4gIGRyaXZlcnMv dmZpby92ZmlvX2lvbW11X3R5cGUxLmMgfCAxNSArKysrKysrLS0tLS0tLS0KPiAgMSBmaWxlIGNo YW5nZWQsIDcgaW5zZXJ0aW9ucygrKSwgOCBkZWxldGlvbnMoLSkKPiAKPiBkaWZmIC0tZ2l0IGEv ZHJpdmVycy92ZmlvL3ZmaW9faW9tbXVfdHlwZTEuYyBiL2RyaXZlcnMvdmZpby92ZmlvX2lvbW11 X3R5cGUxLmMKPiBpbmRleCBkODY0Mjc3ZWExNmYuLjc5NWUxM2YzZWYwOCAxMDA2NDQKPiAtLS0g YS9kcml2ZXJzL3ZmaW8vdmZpb19pb21tdV90eXBlMS5jCj4gKysrIGIvZHJpdmVycy92ZmlvL3Zm aW9faW9tbXVfdHlwZTEuYwo+IEBAIC0zMjcsOSArMzI3LDggQEAgc3RhdGljIGludCBwdXRfcGZu KHVuc2lnbmVkIGxvbmcgcGZuLCBpbnQgcHJvdCkKPiAgewo+ICAJaWYgKCFpc19pbnZhbGlkX3Jl c2VydmVkX3BmbihwZm4pKSB7Cj4gIAkJc3RydWN0IHBhZ2UgKnBhZ2UgPSBwZm5fdG9fcGFnZShw Zm4pOwo+IC0JCWlmIChwcm90ICYgSU9NTVVfV1JJVEUpCj4gLQkJCVNldFBhZ2VEaXJ0eShwYWdl KTsKPiAtCQlwdXRfcGFnZShwYWdlKTsKPiArCj4gKwkJcHV0X3VzZXJfcGFnZXNfZGlydHlfbG9j aygmcGFnZSwgMSwgcHJvdCAmIElPTU1VX1dSSVRFKTsKPiAgCQlyZXR1cm4gMTsKPiAgCX0KPiAg CXJldHVybiAwOwo+IEBAIC0zNDksMTEgKzM0OCwxMSBAQCBzdGF0aWMgaW50IHZhZGRyX2dldF9w Zm4oc3RydWN0IG1tX3N0cnVjdCAqbW0sIHVuc2lnbmVkIGxvbmcgdmFkZHIsCj4gIAo+ICAJZG93 bl9yZWFkKCZtbS0+bW1hcF9zZW0pOwo+ICAJaWYgKG1tID09IGN1cnJlbnQtPm1tKSB7Cj4gLQkJ cmV0ID0gZ2V0X3VzZXJfcGFnZXModmFkZHIsIDEsIGZsYWdzIHwgRk9MTF9MT05HVEVSTSwgcGFn ZSwKPiAtCQkJCSAgICAgdm1hcyk7Cj4gKwkJcmV0ID0gcGluX2xvbmd0ZXJtX3BhZ2VzKHZhZGRy LCAxLCBmbGFncywgcGFnZSwgdm1hcyk7Cj4gIAl9IGVsc2Ugewo+IC0JCXJldCA9IGdldF91c2Vy X3BhZ2VzX3JlbW90ZShOVUxMLCBtbSwgdmFkZHIsIDEsIGZsYWdzLCBwYWdlLAo+IC0JCQkJCSAg ICB2bWFzLCBOVUxMKTsKPiArCQlyZXQgPSBwaW5fbG9uZ3Rlcm1fcGFnZXNfcmVtb3RlKE5VTEws IG1tLCB2YWRkciwgMSwKPiArCQkJCQkJZmxhZ3MsIHBhZ2UsIHZtYXMsCj4gKwkJCQkJCU5VTEwp Owo+ICAJCS8qCj4gIAkJICogVGhlIGxpZmV0aW1lIG9mIGEgdmFkZHJfZ2V0X3BmbigpIHBhZ2Ug cGluIGlzCj4gIAkJICogdXNlcnNwYWNlLWNvbnRyb2xsZWQuIEluIHRoZSBmcy1kYXggY2FzZSB0 aGlzIGNvdWxkCj4gQEAgLTM2Myw3ICszNjIsNyBAQCBzdGF0aWMgaW50IHZhZGRyX2dldF9wZm4o c3RydWN0IG1tX3N0cnVjdCAqbW0sIHVuc2lnbmVkIGxvbmcgdmFkZHIsCj4gIAkJICovCj4gIAkJ aWYgKHJldCA+IDAgJiYgdm1hX2lzX2ZzZGF4KHZtYXNbMF0pKSB7Cj4gIAkJCXJldCA9IC1FT1BO T1RTVVBQOwo+IC0JCQlwdXRfcGFnZShwYWdlWzBdKTsKPiArCQkJcHV0X3VzZXJfcGFnZShwYWdl WzBdKTsKPiAgCQl9Cj4gIAl9Cj4gIAl1cF9yZWFkKCZtbS0+bW1hcF9zZW0pOwo+IApfX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwpkcmktZGV2ZWwgbWFpbGlu ZyBsaXN0CmRyaS1kZXZlbEBsaXN0cy5mcmVlZGVza3RvcC5vcmcKaHR0cHM6Ly9saXN0cy5mcmVl ZGVza3RvcC5vcmcvbWFpbG1hbi9saXN0aW5mby9kcmktZGV2ZWw=