netdev - Re: Bug in short splice to socket?

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Message-ID: <1380699.1685739007@warthog.procyon.org.uk>
Date: Fri, 02 Jun 2023 21:50:07 +0100
From: David Howells <dhowells@...hat.com>
To: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: dhowells@...hat.com, Jakub Kicinski <kuba@...nel.org>,
    netdev@...r.kernel.org, "David S.
 Miller" <davem@...emloft.net>,
    Eric Dumazet <edumazet@...gle.com>, 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,
    Chuck Lever <chuck.lever@...cle.com>,
    Boris Pismenny <borisp@...dia.com>,
    John Fastabend <john.fastabend@...il.com>,
    Christoph Hellwig <hch@...radead.org>
Subject: Re: Bug in short splice to socket?

Linus Torvalds <torvalds@...ux-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