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([2a09:80c0:192:0:5dac:bf3d:c41:c3e7]) by smtp.gmail.com with ESMTPSA id k18-20020a056000005200b002c71dd1109fsm7318197wrx.47.2023.03.16.06.14.12 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 16 Mar 2023 06:14:13 -0700 (PDT) Message-ID: Date: Thu, 16 Mar 2023 14:14:12 +0100 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.8.0 Subject: Re: [PATCH v19 04/15] overlayfs: Implement splice-read To: David Howells , Jens Axboe , Al Viro , Christoph Hellwig Cc: Matthew Wilcox , Jan Kara , Jeff Layton , Jason Gunthorpe , Logan Gunthorpe , Hillf Danton , Christian Brauner , Linus Torvalds , linux-fsdevel@vger.kernel.org, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, Christoph Hellwig , John Hubbard , Miklos Szeredi , linux-unionfs@vger.kernel.org References: <20230315163549.295454-1-dhowells@redhat.com> <20230315163549.295454-5-dhowells@redhat.com> From: David Hildenbrand Organization: Red Hat In-Reply-To: <20230315163549.295454-5-dhowells@redhat.com> X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Language: en-US Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Rspamd-Queue-Id: F288F80019 X-Stat-Signature: h6bscd5odmuw1sjriacs3h5fsmn63dyf X-Rspam-User: X-Rspamd-Server: rspam08 X-HE-Tag: 1678972456-652269 X-HE-Meta: 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 t5PA3PjJ 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 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 15.03.23 17:35, David Howells wrote: > Implement splice-read for overlayfs by passing the request down a layer > rather than going through generic_file_splice_read() which is going to be > changed to assume that ->read_folio() is present on buffered files. > > Signed-off-by: David Howells > cc: Christoph Hellwig > cc: Jens Axboe > cc: Al Viro > cc: John Hubbard > cc: David Hildenbrand > cc: Matthew Wilcox > cc: Miklos Szeredi > cc: linux-unionfs@vger.kernel.org > cc: linux-block@vger.kernel.org > cc: linux-fsdevel@vger.kernel.org > cc: linux-mm@kvack.org > --- Reviewed-by: David Hildenbrand -- Thanks, David / dhildenb