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Message-ID: <CANn89iLFc3gxo-5gEn36VFYdocXQPiAqRsTPEHcB8JA3mw8+8g@mail.gmail.com> Date: Thu, 6 Apr 2023 11:46:42 +0200 From: Eric Dumazet <edumazet@...gle.com> To: David Howells <dhowells@...hat.com> Cc: netdev@...r.kernel.org, "David S. Miller" <davem@...emloft.net>, Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, Willem de Bruijn <willemdebruijn.kernel@...il.com>, Matthew Wilcox <willy@...radead.org>, Al Viro <viro@...iv.linux.org.uk>, Christoph Hellwig <hch@...radead.org>, Jens Axboe <axboe@...nel.dk>, Jeff Layton <jlayton@...nel.org>, Christian Brauner <brauner@...nel.org>, Chuck Lever III <chuck.lever@...cle.com>, Linus Torvalds <torvalds@...ux-foundation.org>, linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org, linux-mm@...ck.org Subject: Re: [PATCH net-next v5 00/19] splice, net: Replace sendpage with sendmsg(MSG_SPLICE_PAGES), part 1 On Thu, Apr 6, 2023 at 11:42 AM David Howells <dhowells@...hat.com> wrote: > > Here's the first tranche of patches towards providing a MSG_SPLICE_PAGES > internal sendmsg flag that is intended to replace the ->sendpage() op with > calls to sendmsg(). MSG_SPLICE is a hint that tells the protocol that it > should splice the pages supplied if it can and copy them if not. > I find this patch series quite big/risky for 6.4 Can you spell out why we need "unspliceable pages support" ? This seems to add quite a lot of code in fast paths. Thanks.
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