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Registered Address: Red Hat UK Ltd, Amberley Place, 107-111 Peascod Street, Windsor, Berkshire, SI4 1TE, United Kingdom. Registered in England and Wales under Company Registration No. 3798903 From: David Howells In-Reply-To: <20230905141604.GA27370@lst.de> References: <20230905141604.GA27370@lst.de> To: Christoph Hellwig Cc: dhowells@redhat.com, Jan Kara , David Hildenbrand , Peter Xu , Lei Huang , miklos@szeredi.hu, Xiubo Li , Ilya Dryomov , Jeff Layton , Trond Myklebust , Anna Schumaker , Latchesar Ionkov , Dominique Martinet , Christian Schoenebeck , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , John Fastabend , Jakub Sitnicki , Boris Pismenny , linux-nfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, ceph-devel@vger.kernel.org, linux-mm@kvack.org, v9fs@lists.linux.dev, netdev@vger.kernel.org Subject: Re: getting rid of the last memory modifitions through gup(FOLL_GET) MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-ID: <1520559.1694162496.1@warthog.procyon.org.uk> Date: Fri, 08 Sep 2023 09:41:36 +0100 Message-ID: <1520560.1694162496@warthog.procyon.org.uk> X-Scanned-By: MIMEDefang 3.1 on 10.11.54.10 X-Rspamd-Server: rspam08 X-Rspamd-Queue-Id: 77B3614000F X-Stat-Signature: 73pmgwcekgdb7zedyc59s9w913mzh9m5 X-Rspam-User: X-HE-Tag: 1694162507-878085 X-HE-Meta: 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 k5CE1wyG QKuh4i42DZfXqB+wSIzmutnOV/iM2qPVjgd5EUluxmCeupeBEsXZ/6OLa3MuJD1+tUjFwvIK3llxJq2s/Aom2GM0aolAJAHIGCNrMuWlKYx/yuYzJ/igrA9rf9uyvFc8GZzzNJBmwb0VYnQoLQyLssjEJbtRM0xXyWC6L4qYTPikYUEIkINh+nXAum+YGAUYxmHXHxw3a1xeZnSLnbWyJhdInpShshrzO5Dziat3RsCjMSqgwS30qEcJLUOmacazTr6wH6KJiySbj1n1IFASu2grSKA== 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: Christoph Hellwig wrote: > we've made some nice progress on converting code that modifies user > memory to the pin_user_pages interface, especially though the work > from David Howells on iov_iter_extract_pages. This thread tries to > coordinate on how to finish off this work. Right at this moment, I'm writing some kunit tests for iov_iter and I've found at least one bug. David