From mboxrd@z Thu Jan 1 00:00:00 1970 From: John Hubbard Subject: Re: [PATCH 17/19] powerpc: book3s64: convert to pin_user_pages() and put_user_page() Date: Mon, 25 Nov 2019 12:46:56 -0800 Message-ID: <9abfd0bf-ffb9-9fad-848c-caff4a490773@nvidia.com> References: <20191125042011.3002372-1-jhubbard@nvidia.com> <20191125042011.3002372-18-jhubbard@nvidia.com> <20191125085915.GB1797@quack2.suse.cz> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from hqemgate16.nvidia.com (hqemgate16.nvidia.com [216.228.121.65]) by gabe.freedesktop.org (Postfix) with ESMTPS id 9B0C389C21 for ; Mon, 25 Nov 2019 20:46:58 +0000 (UTC) In-Reply-To: <20191125085915.GB1797@quack2.suse.cz> Content-Language: en-US List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" To: Jan Kara Cc: Michal Hocko , 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 , bpf@vger.kerne List-Id: dri-devel@lists.freedesktop.org T24gMTEvMjUvMTkgMTI6NTkgQU0sIEphbiBLYXJhIHdyb3RlOgo+IE9uIFN1biAyNC0xMS0xOSAy MDoyMDowOSwgSm9obiBIdWJiYXJkIHdyb3RlOgo+PiAxLiBDb252ZXJ0IGZyb20gZ2V0X3VzZXJf cGFnZXMoKSB0byBwaW5fdXNlcl9wYWdlcygpLgo+Pgo+PiAyLiBBcyByZXF1aXJlZCBieSBwaW5f dXNlcl9wYWdlcygpLCByZWxlYXNlIHRoZXNlIHBhZ2VzIHZpYQo+PiBwdXRfdXNlcl9wYWdlKCku IEluIHRoaXMgY2FzZSwgZG8gc28gdmlhIHB1dF91c2VyX3BhZ2VzX2RpcnR5X2xvY2soKS4KPj4K Pj4gVGhhdCBoYXMgdGhlIHNpZGUgZWZmZWN0IG9mIGNhbGxpbmcgc2V0X3BhZ2VfZGlydHlfbG9j aygpLCBpbnN0ZWFkCj4+IG9mIHNldF9wYWdlX2RpcnR5KCkuIFRoaXMgaXMgcHJvYmFibHkgbW9y ZSBhY2N1cmF0ZS4KPj4KPj4gQXMgQ2hyaXN0b3BoIEhlbGx3aWcgcHV0IGl0LCAic2V0X3BhZ2Vf ZGlydHkoKSBpcyBvbmx5IHNhZmUgaWYgd2UgYXJlCj4+IGRlYWxpbmcgd2l0aCBhIGZpbGUgYmFj a2VkIHBhZ2Ugd2hlcmUgd2UgaGF2ZSByZWZlcmVuY2Ugb24gdGhlIGlub2RlIGl0Cj4+IGhhbmdz IG9mZi4iIFsxXQo+Pgo+PiAzLiBSZWxlYXNlIGVhY2ggcGFnZSBpbiBtZW0tPmhwYWdlc1tdIChp bnN0ZWFkIG9mIG1lbS0+aHBhc1tdKSwgYmVjYXVzZQo+PiB0aGF0IGlzIHRoZSBhcnJheSB0aGF0 IHBpbl9sb25ndGVybV9wYWdlcygpIGZpbGxlZCBpbi4gVGhpcyBpcyBtb3JlCj4+IGFjY3VyYXRl IGFuZCBzaG91bGQgYmUgYSBsaXR0bGUgc2FmZXIgZnJvbSBhIG1haW50ZW5hbmNlIHBvaW50IG9m Cj4+IHZpZXcuCj4gCj4gRXhjZXB0IHRoYXQgdGhpcyBicmVha3MgdGhlIGNvZGUuIGhwYWdlcyBp cyB1bmlvbmVkIHdpdGggaHBhcy4uLgo+IAoKT0suIAoKPj4gQEAgLTIxMiwxMCArMjExLDkgQEAg c3RhdGljIHZvaWQgbW1faW9tbXVfdW5waW4oc3RydWN0IG1tX2lvbW11X3RhYmxlX2dyb3VwX21l bV90ICptZW0pCj4+ICAJCWlmICghcGFnZSkKPj4gIAkJCWNvbnRpbnVlOwo+PiAgCj4+IC0JCWlm IChtZW0tPmhwYXNbaV0gJiBNTV9JT01NVV9UQUJMRV9HUk9VUF9QQUdFX0RJUlRZKQo+PiAtCQkJ U2V0UGFnZURpcnR5KHBhZ2UpOwo+PiArCQlwdXRfdXNlcl9wYWdlc19kaXJ0eV9sb2NrKCZtZW0t PmhwYWdlc1tpXSwgMSwKPj4gKwkJCQkJICBNTV9JT01NVV9UQUJMRV9HUk9VUF9QQUdFX0RJUlRZ KTsKPiAKPiBBbmQgdGhlIGRpcnR5aW5nIGNvbmRpdGlvbiBpcyB3cm9uZyBoZXJlIGFzIHdlbGwu IEN1cnJlbnRseSBpdCBpcyBhbHdheXMKPiB0cnVlLgo+IAo+IAkJCQkJCQkJSG9uemEKPiAKClll cy4gRml4ZWQgdXAgbG9jYWxseS4gVGhlIGZ1bmN0aW9uIG5vdyBsb29rcyBsaWtlIHRoaXMgKGZv ciB0aGlzIHBhdGNoLCBub3QgZm9yCnRoZSBlbnRpcmUgc2VyaWVzLCB3aGljaCByZW5hbWVzICJw dXQiIHRvICJ1bnBpbiIpOgoKCnN0YXRpYyB2b2lkIG1tX2lvbW11X3VucGluKHN0cnVjdCBtbV9p b21tdV90YWJsZV9ncm91cF9tZW1fdCAqbWVtKQp7Cglsb25nIGk7CglzdHJ1Y3QgcGFnZSAqcGFn ZSA9IE5VTEw7CgoJaWYgKCFtZW0tPmhwYXMpCgkJcmV0dXJuOwoKCWZvciAoaSA9IDA7IGkgPCBt ZW0tPmVudHJpZXM7ICsraSkgewoJCWlmICghbWVtLT5ocGFzW2ldKQoJCQljb250aW51ZTsKCgkJ cGFnZSA9IHBmbl90b19wYWdlKG1lbS0+aHBhc1tpXSA+PiBQQUdFX1NISUZUKTsKCQlpZiAoIXBh Z2UpCgkJCWNvbnRpbnVlOwoKCQlwdXRfdXNlcl9wYWdlc19kaXJ0eV9sb2NrKCZwYWdlLCAxLAoJ CQkJbWVtLT5ocGFzW2ldICYgTU1fSU9NTVVfVEFCTEVfR1JPVVBfUEFHRV9ESVJUWSk7CgoJCW1l bS0+aHBhc1tpXSA9IDA7Cgl9Cn0KCnRoYW5rcywKLS0gCkpvaG4gSHViYmFyZApOVklESUEKCl9f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fCmRyaS1kZXZlbCBt YWlsaW5nIGxpc3QKZHJpLWRldmVsQGxpc3RzLmZyZWVkZXNrdG9wLm9yZwpodHRwczovL2xpc3Rz LmZyZWVkZXNrdG9wLm9yZy9tYWlsbWFuL2xpc3RpbmZvL2RyaS1kZXZlbA== 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,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 A2C35C432C3 for ; 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Mon, 25 Nov 2019 12:47:00 -0800 Received: from hqmail.nvidia.com ([172.20.161.6]) by hqpgpgate101.nvidia.com (PGP Universal service); Mon, 25 Nov 2019 12:46:58 -0800 X-PGP-Universal: processed; by hqpgpgate101.nvidia.com on Mon, 25 Nov 2019 12:46:58 -0800 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; Mon, 25 Nov 2019 20:46:57 +0000 Subject: Re: [PATCH 17/19] powerpc: book3s64: convert to pin_user_pages() and put_user_page() To: Jan Kara References: <20191125042011.3002372-1-jhubbard@nvidia.com> <20191125042011.3002372-18-jhubbard@nvidia.com> <20191125085915.GB1797@quack2.suse.cz> From: John Hubbard X-Nvconfidentiality: public Message-ID: <9abfd0bf-ffb9-9fad-848c-caff4a490773@nvidia.com> Date: Mon, 25 Nov 2019 12:46:56 -0800 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.2.2 MIME-Version: 1.0 In-Reply-To: <20191125085915.GB1797@quack2.suse.cz> 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-Original-DKIM-Signature: v=1; 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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: <20191125204656.mYFgPcHiHIaC2mE2XEuXT8zdjvq0C1YLo2K1tm0GnzI@z> T24gMTEvMjUvMTkgMTI6NTkgQU0sIEphbiBLYXJhIHdyb3RlOgo+IE9uIFN1biAyNC0xMS0xOSAy MDoyMDowOSwgSm9obiBIdWJiYXJkIHdyb3RlOgo+PiAxLiBDb252ZXJ0IGZyb20gZ2V0X3VzZXJf cGFnZXMoKSB0byBwaW5fdXNlcl9wYWdlcygpLgo+Pgo+PiAyLiBBcyByZXF1aXJlZCBieSBwaW5f dXNlcl9wYWdlcygpLCByZWxlYXNlIHRoZXNlIHBhZ2VzIHZpYQo+PiBwdXRfdXNlcl9wYWdlKCku IEluIHRoaXMgY2FzZSwgZG8gc28gdmlhIHB1dF91c2VyX3BhZ2VzX2RpcnR5X2xvY2soKS4KPj4K Pj4gVGhhdCBoYXMgdGhlIHNpZGUgZWZmZWN0IG9mIGNhbGxpbmcgc2V0X3BhZ2VfZGlydHlfbG9j aygpLCBpbnN0ZWFkCj4+IG9mIHNldF9wYWdlX2RpcnR5KCkuIFRoaXMgaXMgcHJvYmFibHkgbW9y ZSBhY2N1cmF0ZS4KPj4KPj4gQXMgQ2hyaXN0b3BoIEhlbGx3aWcgcHV0IGl0LCAic2V0X3BhZ2Vf ZGlydHkoKSBpcyBvbmx5IHNhZmUgaWYgd2UgYXJlCj4+IGRlYWxpbmcgd2l0aCBhIGZpbGUgYmFj a2VkIHBhZ2Ugd2hlcmUgd2UgaGF2ZSByZWZlcmVuY2Ugb24gdGhlIGlub2RlIGl0Cj4+IGhhbmdz IG9mZi4iIFsxXQo+Pgo+PiAzLiBSZWxlYXNlIGVhY2ggcGFnZSBpbiBtZW0tPmhwYWdlc1tdIChp bnN0ZWFkIG9mIG1lbS0+aHBhc1tdKSwgYmVjYXVzZQo+PiB0aGF0IGlzIHRoZSBhcnJheSB0aGF0 IHBpbl9sb25ndGVybV9wYWdlcygpIGZpbGxlZCBpbi4gVGhpcyBpcyBtb3JlCj4+IGFjY3VyYXRl IGFuZCBzaG91bGQgYmUgYSBsaXR0bGUgc2FmZXIgZnJvbSBhIG1haW50ZW5hbmNlIHBvaW50IG9m Cj4+IHZpZXcuCj4gCj4gRXhjZXB0IHRoYXQgdGhpcyBicmVha3MgdGhlIGNvZGUuIGhwYWdlcyBp cyB1bmlvbmVkIHdpdGggaHBhcy4uLgo+IAoKT0suIAoKPj4gQEAgLTIxMiwxMCArMjExLDkgQEAg c3RhdGljIHZvaWQgbW1faW9tbXVfdW5waW4oc3RydWN0IG1tX2lvbW11X3RhYmxlX2dyb3VwX21l bV90ICptZW0pCj4+ICAJCWlmICghcGFnZSkKPj4gIAkJCWNvbnRpbnVlOwo+PiAgCj4+IC0JCWlm IChtZW0tPmhwYXNbaV0gJiBNTV9JT01NVV9UQUJMRV9HUk9VUF9QQUdFX0RJUlRZKQo+PiAtCQkJ U2V0UGFnZURpcnR5KHBhZ2UpOwo+PiArCQlwdXRfdXNlcl9wYWdlc19kaXJ0eV9sb2NrKCZtZW0t PmhwYWdlc1tpXSwgMSwKPj4gKwkJCQkJICBNTV9JT01NVV9UQUJMRV9HUk9VUF9QQUdFX0RJUlRZ KTsKPiAKPiBBbmQgdGhlIGRpcnR5aW5nIGNvbmRpdGlvbiBpcyB3cm9uZyBoZXJlIGFzIHdlbGwu IEN1cnJlbnRseSBpdCBpcyBhbHdheXMKPiB0cnVlLgo+IAo+IAkJCQkJCQkJSG9uemEKPiAKClll cy4gRml4ZWQgdXAgbG9jYWxseS4gVGhlIGZ1bmN0aW9uIG5vdyBsb29rcyBsaWtlIHRoaXMgKGZv ciB0aGlzIHBhdGNoLCBub3QgZm9yCnRoZSBlbnRpcmUgc2VyaWVzLCB3aGljaCByZW5hbWVzICJw dXQiIHRvICJ1bnBpbiIpOgoKCnN0YXRpYyB2b2lkIG1tX2lvbW11X3VucGluKHN0cnVjdCBtbV9p b21tdV90YWJsZV9ncm91cF9tZW1fdCAqbWVtKQp7Cglsb25nIGk7CglzdHJ1Y3QgcGFnZSAqcGFn ZSA9IE5VTEw7CgoJaWYgKCFtZW0tPmhwYXMpCgkJcmV0dXJuOwoKCWZvciAoaSA9IDA7IGkgPCBt ZW0tPmVudHJpZXM7ICsraSkgewoJCWlmICghbWVtLT5ocGFzW2ldKQoJCQljb250aW51ZTsKCgkJ cGFnZSA9IHBmbl90b19wYWdlKG1lbS0+aHBhc1tpXSA+PiBQQUdFX1NISUZUKTsKCQlpZiAoIXBh Z2UpCgkJCWNvbnRpbnVlOwoKCQlwdXRfdXNlcl9wYWdlc19kaXJ0eV9sb2NrKCZwYWdlLCAxLAoJ CQkJbWVtLT5ocGFzW2ldICYgTU1fSU9NTVVfVEFCTEVfR1JPVVBfUEFHRV9ESVJUWSk7CgoJCW1l bS0+aHBhc1tpXSA9IDA7Cgl9Cn0KCnRoYW5rcywKLS0gCkpvaG4gSHViYmFyZApOVklESUEKCl9f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fCmRyaS1kZXZlbCBt YWlsaW5nIGxpc3QKZHJpLWRldmVsQGxpc3RzLmZyZWVkZXNrdG9wLm9yZwpodHRwczovL2xpc3Rz LmZyZWVkZXNrdG9wLm9yZy9tYWlsbWFuL2xpc3RpbmZvL2RyaS1kZXZlbA==