linux-kernel - Re: [PATCH v6 00/34] iov_iter: Improve page extraction (ref, pin or just list)

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Message-ID: <Y8ZSWM2bxlRmMMTz@infradead.org>
Date:   Mon, 16 Jan 2023 23:46:32 -0800
From:   Christoph Hellwig <hch@...radead.org>
To:     David Howells <dhowells@...hat.com>
Cc:     Al Viro <viro@...iv.linux.org.uk>,
        "James E.J. Bottomley" <jejb@...ux.ibm.com>,
        Paolo Abeni <pabeni@...hat.com>,
        John Hubbard <jhubbard@...dia.com>,
        Christoph Hellwig <hch@....de>, Paulo Alcantara <pc@....nz>,
        linux-scsi@...r.kernel.org, Steve French <sfrench@...ba.org>,
        Stefan Metzmacher <metze@...ba.org>,
        Miklos Szeredi <miklos@...redi.hu>,
        "Martin K. Petersen" <martin.petersen@...cle.com>,
        Logan Gunthorpe <logang@...tatee.com>,
        Jeff Layton <jlayton@...nel.org>,
        Jakub Kicinski <kuba@...nel.org>, netdev@...r.kernel.org,
        Rohith Surabattula <rohiths.msft@...il.com>,
        Eric Dumazet <edumazet@...gle.com>,
        Matthew Wilcox <willy@...radead.org>,
        Anna Schumaker <anna@...nel.org>, Jens Axboe <axboe@...nel.dk>,
        Shyam Prasad N <nspmangalore@...il.com>,
        Tom Talpey <tom@...pey.com>, linux-rdma@...r.kernel.org,
        Trond Myklebust <trond.myklebust@...merspace.com>,
        Christian Schoenebeck <linux_oss@...debyte.com>,
        linux-mm@...ck.org, linux-crypto@...r.kernel.org,
        linux-nfs@...r.kernel.org, v9fs-developer@...ts.sourceforge.net,
        Latchesar Ionkov <lucho@...kov.net>,
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        Eric Van Hensbergen <ericvh@...il.com>,
        Long Li <longli@...rosoft.com>, Jan Kara <jack@...e.cz>,
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        Dominique Martinet <asmadeus@...ewreck.org>,
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        "David S. Miller" <davem@...emloft.net>,
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        Herbert Xu <herbert@...dor.apana.org.au>,
        Christoph Hellwig <hch@...radead.org>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v6 00/34] iov_iter: Improve page extraction (ref, pin or
 just list)

First off the liver comment:  can we cut down things for a first
round?  Maybe just convert everything using the bio based helpers
and then chunk it up?  Reviewing 34 patches across a dozen subsystems
isn't going to be easy and it will be hard to come up with a final
positive conclusion.