netdev - Re: getting rid of the last memory modifitions through gup(FOLL

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Message-ID: <1520560.1694162496@warthog.procyon.org.uk>
Date: Fri, 08 Sep 2023 09:41:36 +0100
From: David Howells <dhowells@...hat.com>
To: Christoph Hellwig <hch@....de>
Cc: dhowells@...hat.com, Jan Kara <jack@...e.cz>,
    David Hildenbrand <david@...hat.com>, Peter Xu <peterx@...hat.com>,
    Lei Huang <lei.huang@...ux.intel.com>, miklos@...redi.hu,
    Xiubo Li <xiubli@...hat.com>, Ilya Dryomov <idryomov@...il.com>,
    Jeff Layton <jlayton@...nel.org>,
    Trond Myklebust <trond.myklebust@...merspace.com>,
    Anna Schumaker <anna@...nel.org>,
    Latchesar Ionkov <lucho@...kov.net>,
    Dominique Martinet <asmadeus@...ewreck.org>,
    Christian Schoenebeck <linux_oss@...debyte.com>,
    "David S. Miller" <davem@...emloft.net>,
    Eric Dumazet <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>,
    Paolo Abeni <pabeni@...hat.com>,
    John Fastabend <john.fastabend@...il.com>,
    Jakub Sitnicki <jakub@...udflare.com>,
    Boris Pismenny <borisp@...dia.com>, linux-nfs@...r.kernel.org,
    linux-fsdevel@...r.kernel.org, ceph-devel@...r.kernel.org,
    linux-mm@...ck.org, v9fs@...ts.linux.dev, netdev@...r.kernel.org
Subject: Re: getting rid of the last memory modifitions through gup(FOLL_GET)

Christoph Hellwig <hch@....de> 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