netdev - Re: [PATCH net-next v5 03/16] ceph: Use sendmsg(MSG_SPLICE

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Message-ID: <3070680.1687792331@warthog.procyon.org.uk>
Date: Mon, 26 Jun 2023 16:12:11 +0100
From: David Howells <dhowells@...hat.com>
To: Ilya Dryomov <idryomov@...il.com>
Cc: dhowells@...hat.com, netdev@...r.kernel.org,
    Alexander Duyck <alexander.duyck@...il.com>,
    "David S. Miller" <davem@...emloft.net>,
    Eric Dumazet <edumazet@...gle.com>, Jakub Kicinski <kuba@...nel.org>,
    Paolo Abeni <pabeni@...hat.com>,
    Willem de Bruijn <willemdebruijn.kernel@...il.com>,
    David Ahern <dsahern@...nel.org>,
    Matthew Wilcox <willy@...radead.org>, Jens Axboe <axboe@...nel.dk>,
    linux-mm@...ck.org, linux-kernel@...r.kernel.org,
    Xiubo Li <xiubli@...hat.com>, Jeff Layton <jlayton@...nel.org>,
    ceph-devel@...r.kernel.org
Subject: Re: [PATCH net-next v5 03/16] ceph: Use sendmsg(MSG_SPLICE_PAGES) rather than sendpage

Ilya Dryomov <idryomov@...il.com> wrote:

> > -       int flags = MSG_DONTWAIT | MSG_NOSIGNAL | more;

Btw, why are you setting MSG_DONTWAIT?  If you're in the middle of
transmitting a message on a TCP socket, surely you can't just switch to
transmitting a different message on the same socket without doing some sort of
reframing?

David