Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
Organization: Red Hat UK Ltd. 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 <dhowells@redhat.com>
In-Reply-To: <CAHk-=wh=V579PDYvkpnTobCLGczbgxpMgGmmhqiTyE34Cpi5Gg@mail.gmail.com>
References: <CAHk-=wh=V579PDYvkpnTobCLGczbgxpMgGmmhqiTyE34Cpi5Gg@mail.gmail.com> <CAHk-=wji_2UwFMkUYkygsYRek05NwaQkH-vA=yKQtQS9Js+urQ@mail.gmail.com> <20230524153311.3625329-1-dhowells@redhat.com> <20230524153311.3625329-10-dhowells@redhat.com> <20230526180844.73745d78@kernel.org> <499791.1685485603@warthog.procyon.org.uk> <CAHk-=wgeixW3cc=Ys8eL0_+22FUhqeEru=nzRrSXy1U4YQdE-w@mail.gmail.com> <CAHk-=wghhHghtvU_SzXxAzfaX35BkNs-x91-Vj6+6tnVEhPrZg@mail.gmail.com> <832277.1685630048@warthog.procyon.org.uk> <909595.1685639680@warthog.procyon.org.uk> <20230601212043.720f85c2@kernel.org> <952877.1685694220@warthog.procyon.org.uk> <CAHk-=wjvgL5nyZmpYRWBfab4NKvfQ7NjUvUhE3a3wYTyTEHdfQ@mail.gmail.com> <1227123.1685706296@warthog.procyon.org.uk> <CAHk-=wgyAGUMHmQM-5Eb556z5xiHZB7cF05qjrtUH4F7P-1rSA@mail.gmail.com> <20230602093929.29fd447d@kernel.org> <CAHk-=whgpCNzmQfTAUY7D8P6t9TgzoLx9Uauu7YGQpgZtg-SYg@mail.gmail.com>
To:     Linus Torvalds <torvalds@linux-foundation.org>
Cc:     dhowells@redhat.com, Jakub Kicinski <kuba@kernel.org>,
        netdev@vger.kernel.org, "David S. Miller" <davem@davemloft.net>,
        Eric Dumazet <edumazet@google.com>,
        Paolo Abeni <pabeni@redhat.com>,
        Willem de Bruijn <willemdebruijn.kernel@gmail.com>,
        David Ahern <dsahern@kernel.org>,
        Matthew Wilcox <willy@infradead.org>,
        Jens Axboe <axboe@kernel.dk>, linux-mm@kvack.org,
        linux-kernel@vger.kernel.org, Chuck Lever <chuck.lever@oracle.com>,
        Boris Pismenny <borisp@nvidia.com>,
        John Fastabend <john.fastabend@gmail.com>,
        Christoph Hellwig <hch@infradead.org>
Subject: Re: Bug in short splice to socket?
MIME-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Content-ID: <1380698.1685739007.1@warthog.procyon.org.uk>
Date:   Fri, 02 Jun 2023 21:50:07 +0100
Message-ID: <1380699.1685739007@warthog.procyon.org.uk>
Precedence: bulk

Linus Torvalds <torvalds@linux-foundation.org> wrote:

> BUT with the small new 'splice_eof()' rule that:
> 
>  - if the user did *not* set SPLICE_F_MORE *and* we didn't hit that
> "use all of len" case that cleared SPLICE_F_MORE, *and* we did a
> "->splice_in()" that returned EOF (ie zero), *then* we will also do
> that ->splice_eof() call.

But not if we didn't splice anything at all yet?

David