From: Phil Sutter <phil@nwl.cc>
To: David Miller <davem@davemloft.net>
Cc: laforge@gnumonks.org, fw@strlen.de, daniel@iogearbox.net,
netdev@vger.kernel.org, netfilter-devel@vger.kernel.org,
alexei.starovoitov@gmail.com
Subject: Re: [PATCH RFC 0/4] net: add bpfilter
Date: Tue, 20 Feb 2018 14:05:49 +0100 [thread overview]
Message-ID: <20180220130549.GA4196@orbyte.nwl.cc> (raw)
In-Reply-To: <20180219.121537.1539564190955393526.davem@davemloft.net>
Hi David,
On Mon, Feb 19, 2018 at 12:15:37PM -0500, David Miller wrote:
> From: Phil Sutter <phil@nwl.cc>
> Date: Mon, 19 Feb 2018 18:09:39 +0100
>
> > What puzzles me about your argumentation is that you seem to propose for
> > the kernel to cover up flaws in userspace. Spinning this concept further
> > would mean that if there would be an old bug in iproute2 we should think
> > of adding a workaround to rtnetlink interface in kernel because
> > containers will keep the old iproute2 binary? Or am I (hopefully) just
> > missing your point?
>
> I'll answer this with a question. I tried to remove UFO entirely from
> the kernel, did you see how that went?
:)
I didn't follow back then, but found mails about KVM live migration
breakage when moving to a kernel without UFO. But isn't that a problem
with how virtio_net optimizes things? Florian recently told me how
iptables CHECKSUM target was mainly introduced to overcome a different
problem in the same area. So all this is kernel covering up for kernel
problems. My question was about covering up for userspace bugs in
kernelspace. If you think that is preferable over fixing userspace, I
have to put that in consideration when dealing with userspace issues.
Cheers, Phil
next prev parent reply other threads:[~2018-02-20 13:06 UTC|newest]
Thread overview: 73+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-02-16 13:40 [PATCH RFC 0/4] net: add bpfilter Daniel Borkmann
2018-02-16 13:40 ` [PATCH RFC 1/4] modules: allow insmod load regular elf binaries Daniel Borkmann
2018-02-16 13:40 ` [PATCH RFC 2/4] bpf: introduce bpfilter commands Daniel Borkmann
2018-02-16 13:40 ` [PATCH RFC 3/4] net: initial bpfilter skeleton Daniel Borkmann
2018-02-16 13:40 ` [PATCH RFC 4/4] bpf: rough bpfilter codegen example hack Daniel Borkmann
2018-02-16 14:57 ` [PATCH RFC 0/4] net: add bpfilter Florian Westphal
2018-02-16 16:14 ` Florian Westphal
2018-02-16 20:44 ` Daniel Borkmann
2018-02-17 12:33 ` Harald Welte
2018-02-17 19:18 ` Florian Westphal
2018-02-16 22:33 ` David Miller
2018-02-17 12:21 ` Harald Welte
2018-02-17 20:10 ` Florian Westphal
2018-02-17 22:38 ` Florian Westphal
2018-02-16 16:53 ` Daniel Borkmann
2018-02-16 22:32 ` David Miller
2018-02-17 12:11 ` Harald Welte
2018-02-18 0:35 ` Florian Westphal
2018-02-19 12:03 ` Daniel Borkmann
2018-02-19 12:52 ` Harald Welte
2018-02-19 14:44 ` David Miller
2018-02-19 14:53 ` Florian Westphal
2018-02-19 15:07 ` David Miller
2018-02-19 15:20 ` Florian Westphal
2018-02-19 15:28 ` David Miller
2018-02-19 15:23 ` Harald Welte
2018-02-19 15:32 ` David Miller
2018-02-19 15:37 ` Jan Engelhardt
2018-02-19 15:43 ` David Miller
2018-02-19 15:36 ` David Miller
2018-02-19 17:20 ` Harald Welte
2018-02-19 17:29 ` David Miller
2018-02-19 18:37 ` Harald Welte
2018-02-19 18:47 ` David Miller
2018-02-19 17:40 ` Arturo Borrero Gonzalez
2018-02-19 18:06 ` Arturo Borrero Gonzalez
2018-02-19 18:43 ` David Miller
2018-02-19 15:00 ` David Miller
2018-02-19 14:59 ` Florian Westphal
2018-02-19 15:13 ` David Miller
2018-02-19 15:15 ` Florian Westphal
2018-02-19 15:27 ` David Miller
2018-02-19 15:38 ` Harald Welte
2018-02-19 15:44 ` David Miller
2018-02-19 17:14 ` Phil Sutter
2018-02-19 17:22 ` David Miller
2018-02-19 18:05 ` Phil Sutter
2018-02-19 18:41 ` David Miller
2018-02-19 20:41 ` Phil Sutter
2018-02-19 21:13 ` Florian Westphal
2018-02-20 10:44 ` Pablo Neira Ayuso
2018-02-20 14:07 ` Daniel Borkmann
2018-02-20 14:55 ` David Miller
2018-02-21 1:52 ` Alexei Starovoitov
2018-02-21 12:01 ` Pablo Neira Ayuso
2018-02-21 12:13 ` Florian Westphal
2018-02-22 2:20 ` nft/bpf interpreters and spectre2. Was: " Alexei Starovoitov
2018-02-22 11:39 ` Pablo Neira Ayuso
2018-02-22 17:06 ` Alexei Starovoitov
2018-02-22 18:47 ` Jann Horn
2018-02-19 17:41 ` Arturo Borrero Gonzalez
2018-02-19 21:30 ` Jozsef Kadlecsik
2018-02-19 15:27 ` Harald Welte
2018-02-19 15:31 ` David Miller
2018-02-19 17:09 ` Phil Sutter
2018-02-19 17:15 ` David Miller
2018-02-20 13:05 ` Phil Sutter [this message]
2018-02-20 9:35 ` Michal Kubecek
2018-02-20 18:10 ` Phil Sutter
2018-02-19 17:32 ` Harald Welte
2018-02-19 17:41 ` Arturo Borrero Gonzalez
2018-02-19 21:42 ` Willem de Bruijn
2018-02-18 23:35 ` Florian Westphal
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