netdev - Re: [PATCH 0/3] bpf: add boot parameters for sysctl knobs

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Date:   Wed, 23 May 2018 14:00:48 +0200
From:   Jesper Dangaard Brouer <brouer@...hat.com>
To:     Eugene Syromiatnikov <esyr@...hat.com>
Cc:     Alexei Starovoitov <alexei.starovoitov@...il.com>,
        netdev@...r.kernel.org, linux-doc@...r.kernel.org,
        Kees Cook <keescook@...omium.org>,
        Kai-Heng Feng <kai.heng.feng@...onical.com>,
        Daniel Borkmann <daniel@...earbox.net>,
        Alexei Starovoitov <ast@...nel.org>,
        Jonathan Corbet <corbet@....net>, Jiri Olsa <jolsa@...nel.org>,
        brouer@...hat.com
Subject: Re: [PATCH 0/3] bpf: add boot parameters for sysctl knobs

On Wed, 23 May 2018 13:35:47 +0200
Eugene Syromiatnikov <esyr@...hat.com> wrote:

> On Mon, May 21, 2018 at 11:58:13AM -0700, Alexei Starovoitov wrote:
> > On Mon, May 21, 2018 at 02:29:30PM +0200, Eugene Syromiatnikov wrote:  
> > > Hello.
> > > 
> > > This patch set adds ability to set default values for
> > > kernel.unprivileged_bpf_disable, net.core.bpf_jit_harden,
> > > net.core.bpf_jit_kallsyms sysctl knobs as well as option to override
> > > them via a boot-time kernel parameter.  
> > 
> > Commits log not only should explain 'what' is being done by the patch,
> > but 'why' as well.  
> 
> Some BPF sysctl knobs affect the loading of BPF programs, and during
> system boot/init stages these sysctls are not yet configured. A
> concrete example is systemd, that has implemented loading of BPF
> programs.
> 
> Thus, to allow controlling these setting at early boot, this patch set
> adds the ability to change the default setting of these sysctl knobs
> as well as option to override them via a boot-time kernel parameter
> (in order to avoid rebuilding kernel each time a need of changing these
> defaults arises).
> 
> The sysctl knobs in question are kernel.unprivileged_bpf_disable,
> net.core.bpf_jit_harden, and net.core.bpf_jit_kallsyms.

Hi Eugene,

You have to resend the entire patchset with this explanation in the
cover-letter.  Your old patchset have been dropped from patchwork[1]
due to being marked with "Changes Requested".

Please remember to give it a "V2" tag and also specify which git tree
you are targeting[2], like [PATCH bpf-next V2].


[1] http://patchwork.ozlabs.org/project/netdev/list/?series=45617&state=%2a

[2] https://github.com/netoptimizer/linux/blob/bpf_doc10/Documentation/bpf/bpf_devel_QA.rst#q-how-do-i-indicate-which-tree-bpf-vs-bpf-next-my-patch-should-be-applied-to
-- 
Best regards,
  Jesper Dangaard Brouer
  MSc.CS, Principal Kernel Engineer at Red Hat
  LinkedIn: http://www.linkedin.com/in/brouer