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Thu, 06 Feb 2020 11:59:54 -0800 (PST) Received: from [192.168.43.191] ([109.126.145.62]) by smtp.gmail.com with ESMTPSA id n14sm58250ejx.11.2020.02.06.11.59.52 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 06 Feb 2020 11:59:53 -0800 (PST) Subject: Re: [PATCH 1/1] io_uring: fix delayed mm check To: Jens Axboe , io-uring@vger.kernel.org, linux-kernel@vger.kernel.org References: <5c7db203bb5aa23c22f16925ac00d50bdbe406e0.1581012158.git.asml.silence@gmail.com> <8dbd13cd-6e93-b765-ade2-27ba91d8c30d@kernel.dk> From: Pavel Begunkov Autocrypt: addr=asml.silence@gmail.com; prefer-encrypt=mutual; keydata= mQINBFmKBOQBEAC76ZFxLAKpDw0bKQ8CEiYJRGn8MHTUhURL02/7n1t0HkKQx2K1fCXClbps bdwSHrhOWdW61pmfMbDYbTj6ZvGRvhoLWfGkzujB2wjNcbNTXIoOzJEGISHaPf6E2IQx1ik9 6uqVkK1OMb7qRvKH0i7HYP4WJzYbEWVyLiAxUj611mC9tgd73oqZ2pLYzGTqF2j6a/obaqha +hXuWTvpDQXqcOZJXIW43atprH03G1tQs7VwR21Q1eq6Yvy2ESLdc38EqCszBfQRMmKy+cfp W3U9Mb1w0L680pXrONcnlDBCN7/sghGeMHjGKfNANjPc+0hzz3rApPxpoE7HC1uRiwC4et83 CKnncH1l7zgeBT9Oa3qEiBlaa1ZCBqrA4dY+z5fWJYjMpwI1SNp37RtF8fKXbKQg+JuUjAa9 Y6oXeyEvDHMyJYMcinl6xCqCBAXPHnHmawkMMgjr3BBRzODmMr+CPVvnYe7BFYfoajzqzq+h EyXSl3aBf0IDPTqSUrhbmjj5OEOYgRW5p+mdYtY1cXeK8copmd+fd/eTkghok5li58AojCba jRjp7zVOLOjDlpxxiKhuFmpV4yWNh5JJaTbwCRSd04sCcDNlJj+TehTr+o1QiORzc2t+N5iJ NbILft19Izdn8U39T5oWiynqa1qCLgbuFtnYx1HlUq/HvAm+kwARAQABtDFQYXZlbCBCZWd1 bmtvdiAoc2lsZW5jZSkgPGFzbWwuc2lsZW5jZUBnbWFpbC5jb20+iQJOBBMBCAA4FiEE+6Ju PTjTbx479o3OWt5b1Glr+6UFAlmKBOQCGwMFCwkIBwIGFQgJCgsCBBYCAwECHgECF4AACgkQ Wt5b1Glr+6WxZA//QueaKHzgdnOikJ7NA/Vq8FmhRlwgtP0+E+w93kL+ZGLzS/cUCIjn2f4Q Mcutj2Neg0CcYPX3b2nJiKr5Vn0rjJ/suiaOa1h1KzyNTOmxnsqE5fmxOf6C6x+NKE18I5Jy xzLQoktbdDVA7JfB1itt6iWSNoOTVcvFyvfe5ggy6FSCcP+m1RlR58XxVLH+qlAvxxOeEr/e aQfUzrs7gqdSd9zQGEZo0jtuBiB7k98t9y0oC9Jz0PJdvaj1NZUgtXG9pEtww3LdeXP/TkFl HBSxVflzeoFaj4UAuy8+uve7ya/ECNCc8kk0VYaEjoVrzJcYdKP583iRhOLlZA6HEmn/+Gh9 4orG67HNiJlbFiW3whxGizWsrtFNLsSP1YrEReYk9j1SoUHHzsu+ZtNfKuHIhK0sU07G1OPN 2rDLlzUWR9Jc22INAkhVHOogOcc5ajMGhgWcBJMLCoi219HlX69LIDu3Y34uIg9QPZIC2jwr 24W0kxmK6avJr7+n4o8m6sOJvhlumSp5TSNhRiKvAHB1I2JB8Q1yZCIPzx+w1ALxuoWiCdwV M/azguU42R17IuBzK0S3hPjXpEi2sK/k4pEPnHVUv9Cu09HCNnd6BRfFGjo8M9kZvw360gC1 reeMdqGjwQ68o9x0R7NBRrtUOh48TDLXCANAg97wjPoy37dQE7e5Ag0EWYoE5AEQAMWS+aBV IJtCjwtfCOV98NamFpDEjBMrCAfLm7wZlmXy5I6o7nzzCxEw06P2rhzp1hIqkaab1kHySU7g dkpjmQ7Jjlrf6KdMP87mC/Hx4+zgVCkTQCKkIxNE76Ff3O9uTvkWCspSh9J0qPYyCaVta2D1 Sq5HZ8WFcap71iVO1f2/FEHKJNz/YTSOS/W7dxJdXl2eoj3gYX2UZNfoaVv8OXKaWslZlgqN jSg9wsTv1K73AnQKt4fFhscN9YFxhtgD/SQuOldE5Ws4UlJoaFX/yCoJL3ky2kC0WFngzwRF Yo6u/KON/o28yyP+alYRMBrN0Dm60FuVSIFafSqXoJTIjSZ6olbEoT0u17Rag8BxnxryMrgR dkccq272MaSS0eOC9K2rtvxzddohRFPcy/8bkX+t2iukTDz75KSTKO+chce62Xxdg62dpkZX xK+HeDCZ7gRNZvAbDETr6XI63hPKi891GeZqvqQVYR8e+V2725w+H1iv3THiB1tx4L2bXZDI DtMKQ5D2RvCHNdPNcZeldEoJwKoA60yg6tuUquvsLvfCwtrmVI2rL2djYxRfGNmFMrUDN1Xq F3xozA91q3iZd9OYi9G+M/OA01husBdcIzj1hu0aL+MGg4Gqk6XwjoSxVd4YT41kTU7Kk+/I 5/Nf+i88ULt6HanBYcY/+Daeo/XFABEBAAGJAjYEGAEIACAWIQT7om49ONNvHjv2jc5a3lvU aWv7pQUCWYoE5AIbDAAKCRBa3lvUaWv7pfmcEACKTRQ28b1y5ztKuLdLr79+T+LwZKHjX++P 4wKjEOECCcB6KCv3hP+J2GCXDOPZvdg/ZYZafqP68Yy8AZqkfa4qPYHmIdpODtRzZSL48kM8 LRzV8Rl7J3ItvzdBRxf4T/Zseu5U6ELiQdCUkPGsJcPIJkgPjO2ROG/ZtYa9DvnShNWPlp+R uPwPccEQPWO/NP4fJl2zwC6byjljZhW5kxYswGMLBwb5cDUZAisIukyAa8Xshdan6C2RZcNs rB3L7vsg/R8UCehxOH0C+NypG2GqjVejNZsc7bgV49EOVltS+GmGyY+moIzxsuLmT93rqyII 5rSbbcTLe6KBYcs24XEoo49Zm9oDA3jYvNpeYD8rDcnNbuZh9kTgBwFN41JHOPv0W2FEEWqe JsCwQdcOQ56rtezdCJUYmRAt3BsfjN3Jn3N6rpodi4Dkdli8HylM5iq4ooeb5VkQ7UZxbCWt UVMKkOCdFhutRmYp0mbv2e87IK4erwNHQRkHUkzbsuym8RVpAZbLzLPIYK/J3RTErL6Z99N2 m3J6pjwSJY/zNwuFPs9zGEnRO4g0BUbwGdbuvDzaq6/3OJLKohr5eLXNU3JkT+3HezydWm3W OPhauth7W0db74Qd49HXK0xe/aPrK+Cp+kU1HRactyNtF8jZQbhMCC8vMGukZtWaAwpjWiiH bA== Message-ID: <5542bd3a-3701-f02a-7015-4c0f4e13cec7@gmail.com> Date: Thu, 6 Feb 2020 22:59:15 +0300 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.3.0 MIME-Version: 1.0 In-Reply-To: <8dbd13cd-6e93-b765-ade2-27ba91d8c30d@kernel.dk> Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="KdrNy1j9THJ32NEXBGnD5Zw6yLX7tMGNA" Sender: io-uring-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: io-uring@vger.kernel.org This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --KdrNy1j9THJ32NEXBGnD5Zw6yLX7tMGNA Content-Type: multipart/mixed; boundary="QDagrq0nx4H1QDPvOJRCEbY3IUa8O28fN"; protected-headers="v1" From: Pavel Begunkov To: Jens Axboe , io-uring@vger.kernel.org, linux-kernel@vger.kernel.org Message-ID: <5542bd3a-3701-f02a-7015-4c0f4e13cec7@gmail.com> Subject: Re: [PATCH 1/1] io_uring: fix delayed mm check References: <5c7db203bb5aa23c22f16925ac00d50bdbe406e0.1581012158.git.asml.silence@gmail.com> <8dbd13cd-6e93-b765-ade2-27ba91d8c30d@kernel.dk> In-Reply-To: <8dbd13cd-6e93-b765-ade2-27ba91d8c30d@kernel.dk> --QDagrq0nx4H1QDPvOJRCEbY3IUa8O28fN Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: quoted-printable On 06/02/2020 22:52, Jens Axboe wrote: > On 2/6/20 11:16 AM, Pavel Begunkov wrote: >> Fail fast if can't grab mm, so past that requests always have an mm >> when required. This fixes not checking mm fault for >> IORING_OP_{READ,WRITE}, as well allows to remove req->has_user >> altogether. >=20 > Looks fine, except that first hunk that I can just delete. >=20 Oops, missed it. Thanks --=20 Pavel Begunkov --QDagrq0nx4H1QDPvOJRCEbY3IUa8O28fN-- --KdrNy1j9THJ32NEXBGnD5Zw6yLX7tMGNA Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- iQIzBAEBCAAdFiEE+6JuPTjTbx479o3OWt5b1Glr+6UFAl48cBMACgkQWt5b1Glr +6VsJQ//f2vqFm7I21IDe/Pv2BvyL1Ii6k5pNsbmlbRih2M+z64lzQxk5eJvtqNW c0oyhEMVhrBOZOXSCDxJE9oNRaxjvGJLKQjYE/kN5ObPMRozzhyMsGmwfHw2uzdf eReW9o1Jx9SHEbmFIsIat4u7mysYh2RghZ7lwonspdlFFsuS3LbLwIQvBT5eiYWF /YQjkdhYAR258w82CUzZsTN47uYKjq8xDJtVSOrGmCKJm+yk4E/pF4RBskRP57m2 9mVMdUcYhpNGC5UOKMOJCvEDtZgcPXGPGEz+mH+Mnjl5cOjpd8ZSPvgO3zscJho2 bcr8etFtHfRzcF8tfTqcN3R5u/uO0cAkbda7JJU73WUMWX2QPL2N8TWKesGLDhne tv8lGklkVeVMgOpNl6VP8LoCDXcBh99Tzl3u2YC026Ka6QWtZV0UOdSN5DTE1Ver QV4b5mKPMvrs59TaDSsy9z1KZ/2ytoFBofyxSq9fOO2ypIbtwsFQFFIZByLqZkiL rgpIdj2FbnGFqFZwdLAE2kJ65eFJVp+9e6FoT0ohpsovLkm3pFlLjFQA5VDsW8Yf tFtBLEb9VPbhtXrH7DoDpGQCHDQ+wcqYNtl0roSMyvBLiBTQUOuFjNBcrxUlZlBO JNZiOawVMv70HvA2YfxS9SY7dBp7Sr/hnauHmVGluNAW4104SNk= =7Qgf -----END PGP SIGNATURE----- --KdrNy1j9THJ32NEXBGnD5Zw6yLX7tMGNA--