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[216.228.121.64]) by mx.google.com with ESMTPS id e76si223205yba.136.2019.05.23.15.54.12 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 23 May 2019 15:54:12 -0700 (PDT) Received-SPF: pass (google.com: domain of jhubbard@nvidia.com designates 216.228.121.64 as permitted sender) client-ip=216.228.121.64; Authentication-Results: mx.google.com; dkim=pass header.i=@nvidia.com header.s=n1 header.b=hOjBNbxm; spf=pass (google.com: domain of jhubbard@nvidia.com designates 216.228.121.64 as permitted sender) smtp.mailfrom=jhubbard@nvidia.com; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=nvidia.com Received: from hqpgpgate101.nvidia.com (Not Verified[216.228.121.13]) by hqemgate15.nvidia.com (using TLS: TLSv1.2, DES-CBC3-SHA) id ; Thu, 23 May 2019 15:54:07 -0700 Received: from hqmail.nvidia.com ([172.20.161.6]) by hqpgpgate101.nvidia.com (PGP Universal service); Thu, 23 May 2019 15:54:11 -0700 X-PGP-Universal: processed; by hqpgpgate101.nvidia.com on Thu, 23 May 2019 15:54:11 -0700 Received: from [10.110.48.28] (172.20.13.39) by HQMAIL107.nvidia.com (172.20.187.13) with Microsoft SMTP Server (TLS) id 15.0.1473.3; Thu, 23 May 2019 22:54:08 +0000 Subject: Re: [PATCH 1/1] infiniband/mm: convert put_page() to put_user_page*() From: John Hubbard To: Ira Weiny CC: Jason Gunthorpe , Andrew Morton , "linux-mm@kvack.org" , LKML , "linux-rdma@vger.kernel.org" , "linux-fsdevel@vger.kernel.org" , Doug Ledford , "Mike Marciniszyn" , Dennis Dalessandro , Christian Benvenuti , "Jan Kara" References: <20190523072537.31940-1-jhubbard@nvidia.com> <20190523072537.31940-2-jhubbard@nvidia.com> <20190523172852.GA27175@iweiny-DESK2.sc.intel.com> <20190523173222.GH12145@mellanox.com> <20190523190423.GA19578@iweiny-DESK2.sc.intel.com> <0bd9859f-8eb0-9148-6209-08ae42665626@nvidia.com> <20190523223701.GA15048@iweiny-DESK2.sc.intel.com> <050f56d0-1dda-036e-e508-3a7255ac7b59@nvidia.com> X-Nvconfidentiality: public Message-ID: <6a18af65-7071-2531-d767-42ba74ad82c4@nvidia.com> Date: Thu, 23 May 2019 15:54:08 -0700 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.6.1 MIME-Version: 1.0 In-Reply-To: <050f56d0-1dda-036e-e508-3a7255ac7b59@nvidia.com> X-Originating-IP: [172.20.13.39] X-ClientProxiedBy: HQMAIL106.nvidia.com (172.18.146.12) To HQMAIL107.nvidia.com (172.20.187.13) Content-Type: text/plain; charset="utf-8" Content-Language: en-US-large Content-Transfer-Encoding: 7bit DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nvidia.com; s=n1; t=1558652047; bh=O/RiGmoYGRmC02sjlkIu6qvEn5MHd+ORmeaARAOsB+c=; h=X-PGP-Universal:Subject:From:To:CC:References: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=hOjBNbxmo0Oua+svsnfjV4ODR+jjb3kNvpchAZldU4CjYjIIRn76kDjdTnLmZWS/Q rTepf8lEmxnjtuHNh6CwoqckUUQWi5NM6Bzy/QtAzpqAyI4rCnP1ihCjCufoUDn4JM w87ysqq3taZlo9/bkfNVXF8tMnsv/6JwLwp1TY0us7ggJQu2tS1lCfzEbyHYapAsdm 82gMkvowgkra8cxbWzoj/m+QlJQl0G9muFCquiUNeV+GNpegaXHpUGgM+FPmV0ZeTD 1+bD8kWAHnGrJho7YtPlzT81sgio8SilaAgeKlDcYXGWeE+iv7CbDwd0LC5tHm3wwE 1xBP0KgrUEWtg== 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: On 5/23/19 3:50 PM, John Hubbard wrote: > [...] > I was thinking of it as a temporary measure, only up until, but not including the > point where put_user_pages() becomes active. That is, the point when put_user_pages > starts decrementing GUP_PIN_COUNTING_BIAS, instead of just forwarding to put_page(). > > (For other readers, that's this patch: > > "mm/gup: debug tracking of get_user_pages() references" > > ...in https://github.com/johnhubbard/linux/tree/gup_dma_core ) > Arggh, correction, I meant this patch: "mm/gup: track gup-pinned pages" ...sorry for any confusion there. thanks, -- John Hubbard NVIDIA