netdev - Re: [PATCH net-next v4 00/20] splice, net: Replace sendpage with sendmsg(MSG_SPLICE

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Date:   Thu, 06 Apr 2023 10:12:19 +0100
From:   David Howells <dhowells@...hat.com>
To:     Jakub Kicinski <kuba@...nel.org>
Cc:     dhowells@...hat.com, 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>,
        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 v4 00/20] splice, net: Replace sendpage with sendmsg(MSG_SPLICE_PAGES), part 1

Jakub Kicinski <kuba@...nel.org> wrote:

> Thanks for splitting off a smaller series!
> My day is out of hours so just a trivial comment, in case kbuild bot
> hasn't pinged you - this appears to break the build on the relatively
> recently added page_frag_cache in google's vNIC (gve).

Yep.  I've just been fixing that up.

I'll also break off the samples patch and that can go by itself.  Is there a
problem with the 32-bit userspace build environment that patchwork is using?
The sample programs that patch adds are all userspace helpers.  It seems that
<features.h> is referencing a file that doesn't exist:

In file included from /usr/include/features.h:514,
                 from /usr/include/bits/libc-header-start.h:33,
                 from /usr/include/stdio.h:27,
                 from ../samples/net/alg-hash.c:9:
/usr/include/gnu/stubs.h:7:11: fatal error: gnu/stubs-32.h: No such file or directory
    7 | # include <gnu/stubs-32.h>
      |           ^~~~~~~~~~~~~~~~
compilation terminated.

Excerpt from:

https://patchwork.hopto.org/static/nipa/737278/13202278/build_32bit/

https://patchwork.kernel.org/project/netdevbpf/patch/20230405165339.3468808-2-dhowells@redhat.com/

David