From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jan Kara Subject: Re: [PATCH v5 11/24] goldish_pipe: convert to pin_user_pages() and put_user_page() Date: Mon, 18 Nov 2019 11:16:58 +0100 Message-ID: <20191118101658.GG17319@quack2.suse.cz> References: <20191115055340.1825745-1-jhubbard@nvidia.com> <20191115055340.1825745-12-jhubbard@nvidia.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from mx1.suse.de (mx2.suse.de [195.135.220.15]) by gabe.freedesktop.org (Postfix) with ESMTPS id 28F806E4A5 for ; Mon, 18 Nov 2019 12:01:24 +0000 (UTC) Content-Disposition: inline In-Reply-To: <20191115055340.1825745-12-jhubbard@nvidia.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" To: John Hubbard 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 , =?iso-8859-1?Q?Bj=F6rn_T=F6pel?= , linux-media@vger.kernel.org, Shuah Khan , linux-block@vger.kernel.org, =?iso-8859-1?B?Suly9G1l?= Glisse , Al Viro , Dan Williams , Mauro Carvalho Chehab List-Id: dri-devel@lists.freedesktop.org T24gVGh1IDE0LTExLTE5IDIxOjUzOjI3LCBKb2huIEh1YmJhcmQgd3JvdGU6Cj4gMS4gQ2FsbCB0 aGUgbmV3IGdsb2JhbCBwaW5fdXNlcl9wYWdlc19mYXN0KCksIGZyb20gcGluX2dvbGRmaXNoX3Bh Z2VzKCkuCj4gCj4gMi4gQXMgcmVxdWlyZWQgYnkgcGluX3VzZXJfcGFnZXMoKSwgcmVsZWFzZSB0 aGVzZSBwYWdlcyB2aWEKPiBwdXRfdXNlcl9wYWdlKCkuIEluIHRoaXMgY2FzZSwgZG8gc28gdmlh IHB1dF91c2VyX3BhZ2VzX2RpcnR5X2xvY2soKS4KPiAKPiBUaGF0IGhhcyB0aGUgc2lkZSBlZmZl Y3Qgb2YgY2FsbGluZyBzZXRfcGFnZV9kaXJ0eV9sb2NrKCksIGluc3RlYWQKPiBvZiBzZXRfcGFn 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ESMTP id E731CB061; Mon, 18 Nov 2019 12:01:20 +0000 (UTC) Received: by quack2.suse.cz (Postfix, from userid 1000) id 7EC421E4B09; Mon, 18 Nov 2019 11:16:58 +0100 (CET) Date: Mon, 18 Nov 2019 11:16:58 +0100 From: Jan Kara To: John Hubbard Subject: Re: [PATCH v5 11/24] goldish_pipe: convert to pin_user_pages() and put_user_page() Message-ID: <20191118101658.GG17319@quack2.suse.cz> References: <20191115055340.1825745-1-jhubbard@nvidia.com> <20191115055340.1825745-12-jhubbard@nvidia.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20191115055340.1825745-12-jhubbard@nvidia.com> User-Agent: Mutt/1.10.1 (2018-07-13) 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 , =?iso-8859-1?Q?Bj=F6rn_T=F6pel?= , linux-media@vger.kernel.org, Shuah Khan , linux-block@vger.kernel.org, =?iso-8859-1?B?Suly9G1l?= Glisse , Al Viro , Dan Williams , Mauro Carvalho Chehab , bpf@vger.kernel.org, Magnus Karlsson , Jens Axboe , netdev@vger.kernel.org, Alex Williamson , linux-fsdevel@vger.kernel.org, Andrew Morton , 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: <20191118101658.WY56rrxFT0jbDgJhv7yn_zZws38r_eq7nVPhqHBwcnw@z> T24gVGh1IDE0LTExLTE5IDIxOjUzOjI3LCBKb2huIEh1YmJhcmQgd3JvdGU6Cj4gMS4gQ2FsbCB0 aGUgbmV3IGdsb2JhbCBwaW5fdXNlcl9wYWdlc19mYXN0KCksIGZyb20gcGluX2dvbGRmaXNoX3Bh Z2VzKCkuCj4gCj4gMi4gQXMgcmVxdWlyZWQgYnkgcGluX3VzZXJfcGFnZXMoKSwgcmVsZWFzZSB0 aGVzZSBwYWdlcyB2aWEKPiBwdXRfdXNlcl9wYWdlKCkuIEluIHRoaXMgY2FzZSwgZG8gc28gdmlh IHB1dF91c2VyX3BhZ2VzX2RpcnR5X2xvY2soKS4KPiAKPiBUaGF0IGhhcyB0aGUgc2lkZSBlZmZl Y3Qgb2YgY2FsbGluZyBzZXRfcGFnZV9kaXJ0eV9sb2NrKCksIGluc3RlYWQKPiBvZiBzZXRfcGFn ZV9kaXJ0eSgpLiBUaGlzIGlzIHByb2JhYmx5IG1vcmUgYWNjdXJhdGUuCj4gCj4gQXMgQ2hyaXN0 b3BoIEhlbGx3aWcgcHV0IGl0LCAic2V0X3BhZ2VfZGlydHkoKSBpcyBvbmx5IHNhZmUgaWYgd2Ug YXJlCj4gZGVhbGluZyB3aXRoIGEgZmlsZSBiYWNrZWQgcGFnZSB3aGVyZSB3ZSBoYXZlIHJlZmVy ZW5jZSBvbiB0aGUgaW5vZGUgaXQKPiBoYW5ncyBvZmYuIiBbMV0KPiAKPiBBbm90aGVyIHNpZGUg ZWZmZWN0IGlzIHRoYXQgdGhlIHJlbGVhc2UgY29kZSBpcyBzaW1wbGlmaWVkIGJlY2F1c2UKPiB0 aGUgcGFnZVtdIGxvb3AgaXMgbm93IGluIGd1cC5jIGluc3RlYWQgb2YgaGVyZSwgc28ganVzdCBk ZWxldGUgdGhlCj4gbG9jYWwgcmVsZWFzZV91c2VyX3BhZ2VzKCkgZW50aXJlbHksIGFuZCBjYWxs Cj4gcHV0X3VzZXJfcGFnZXNfZGlydHlfbG9jaygpIGRpcmVjdGx5LCBpbnN0ZWFkLgo+IAo+IFsx XSBodHRwczovL2xvcmUua2VybmVsLm9yZy9yLzIwMTkwNzIzMTUzNjQwLkdCNzIwQGxzdC5kZQo+ IAo+IFJldmlld2VkLWJ5OiBJcmEgV2VpbnkgPGlyYS53ZWlueUBpbnRlbC5jb20+Cj4gU2lnbmVk LW9mZi1ieTogSm9obiBIdWJiYXJkIDxqaHViYmFyZEBudmlkaWEuY29tPgoKTG9va3MgZ29vZCB0 byBtZS4gWW91IGNhbiBhZGQ6CgpSZXZpZXdlZC1ieTogSmFuIEthcmEgPGphY2tAc3VzZS5jej4K CgkJCQkJCQkJSG9uemEKCj4gLS0tCj4gIGRyaXZlcnMvcGxhdGZvcm0vZ29sZGZpc2gvZ29sZGZp c2hfcGlwZS5jIHwgMTcgKysrLS0tLS0tLS0tLS0tLS0KPiAgMSBmaWxlIGNoYW5nZWQsIDMgaW5z ZXJ0aW9ucygrKSwgMTQgZGVsZXRpb25zKC0pCj4gCj4gZGlmZiAtLWdpdCBhL2RyaXZlcnMvcGxh dGZvcm0vZ29sZGZpc2gvZ29sZGZpc2hfcGlwZS5jIGIvZHJpdmVycy9wbGF0Zm9ybS9nb2xkZmlz aC9nb2xkZmlzaF9waXBlLmMKPiBpbmRleCA3ZWQyYTIxYTBiYWMuLjYzNWE4YmMxYjQ4MCAxMDA2 NDQKPiAtLS0gYS9kcml2ZXJzL3BsYXRmb3JtL2dvbGRmaXNoL2dvbGRmaXNoX3BpcGUuYwo+ICsr KyBiL2RyaXZlcnMvcGxhdGZvcm0vZ29sZGZpc2gvZ29sZGZpc2hfcGlwZS5jCj4gQEAgLTI3NCw3 ICsyNzQsNyBAQCBzdGF0aWMgaW50IHBpbl9nb2xkZmlzaF9wYWdlcyh1bnNpZ25lZCBsb25nIGZp cnN0X3BhZ2UsCj4gIAkJKml0ZXJfbGFzdF9wYWdlX3NpemUgPSBsYXN0X3BhZ2Vfc2l6ZTsKPiAg CX0KPiAgCj4gLQlyZXQgPSBnZXRfdXNlcl9wYWdlc19mYXN0KGZpcnN0X3BhZ2UsIHJlcXVlc3Rl ZF9wYWdlcywKPiArCXJldCA9IHBpbl91c2VyX3BhZ2VzX2Zhc3QoZmlyc3RfcGFnZSwgcmVxdWVz dGVkX3BhZ2VzLAo+ICAJCQkJICAhaXNfd3JpdGUgPyBGT0xMX1dSSVRFIDogMCwKPiAgCQkJCSAg cGFnZXMpOwo+ICAJaWYgKHJldCA8PSAwKQo+IEBAIC0yODUsMTggKzI4NSw2IEBAIHN0YXRpYyBp bnQgcGluX2dvbGRmaXNoX3BhZ2VzKHVuc2lnbmVkIGxvbmcgZmlyc3RfcGFnZSwKPiAgCXJldHVy biByZXQ7Cj4gIH0KPiAgCj4gLXN0YXRpYyB2b2lkIHJlbGVhc2VfdXNlcl9wYWdlcyhzdHJ1Y3Qg cGFnZSAqKnBhZ2VzLCBpbnQgcGFnZXNfY291bnQsCj4gLQkJCSAgICAgICBpbnQgaXNfd3JpdGUs IHMzMiBjb25zdW1lZF9zaXplKQo+IC17Cj4gLQlpbnQgaTsKPiAtCj4gLQlmb3IgKGkgPSAwOyBp IDwgcGFnZXNfY291bnQ7IGkrKykgewo+IC0JCWlmICghaXNfd3JpdGUgJiYgY29uc3VtZWRfc2l6 ZSA+IDApCj4gLQkJCXNldF9wYWdlX2RpcnR5KHBhZ2VzW2ldKTsKPiAtCQlwdXRfcGFnZShwYWdl c1tpXSk7Cj4gLQl9Cj4gLX0KPiAtCj4gIC8qIFBvcHVsYXRlIHRoZSBjYWxsIHBhcmFtZXRlcnMs IG1lcmdpbmcgYWRqYWNlbnQgcGFnZXMgdG9nZXRoZXIgKi8KPiAgc3RhdGljIHZvaWQgcG9wdWxh dGVfcndfcGFyYW1zKHN0cnVjdCBwYWdlICoqcGFnZXMsCj4gIAkJCSAgICAgICBpbnQgcGFnZXNf Y291bnQsCj4gQEAgLTM3Miw3ICszNjAsOCBAQCBzdGF0aWMgaW50IHRyYW5zZmVyX21heF9idWZm ZXJzKHN0cnVjdCBnb2xkZmlzaF9waXBlICpwaXBlLAo+ICAKPiAgCSpjb25zdW1lZF9zaXplID0g cGlwZS0+Y29tbWFuZF9idWZmZXItPnJ3X3BhcmFtcy5jb25zdW1lZF9zaXplOwo+ICAKPiAtCXJl bGVhc2VfdXNlcl9wYWdlcyhwaXBlLT5wYWdlcywgcGFnZXNfY291bnQsIGlzX3dyaXRlLCAqY29u c3VtZWRfc2l6ZSk7Cj4gKwlwdXRfdXNlcl9wYWdlc19kaXJ0eV9sb2NrKHBpcGUtPnBhZ2VzLCBw YWdlc19jb3VudCwKPiArCQkJCSAgIWlzX3dyaXRlICYmICpjb25zdW1lZF9zaXplID4gMCk7Cj4g IAo+ICAJbXV0ZXhfdW5sb2NrKCZwaXBlLT5sb2NrKTsKPiAgCXJldHVybiAwOwo+IC0tIAo+IDIu MjQuMAo+IAotLSAKSmFuIEthcmEgPGphY2tAc3VzZS5jb20+ClNVU0UgTGFicywgQ1IKX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KZHJpLWRldmVsIG1haWxp bmcgbGlzdApkcmktZGV2ZWxAbGlzdHMuZnJlZWRlc2t0b3Aub3JnCmh0dHBzOi8vbGlzdHMuZnJl ZWRlc2t0b3Aub3JnL21haWxtYW4vbGlzdGluZm8vZHJpLWRldmVs