netdev - Re: [PATCH v8 bpf-next 6/7] bpf: allow for tailcalls in BPF subprograms for x64 JIT

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Date:   Fri, 18 Sep 2020 00:44:36 +0200
From:   Maciej Fijalkowski <maciej.fijalkowski@...el.com>
To:     Andrii Nakryiko <andrii.nakryiko@...il.com>
Cc:     Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        bpf <bpf@...r.kernel.org>, Networking <netdev@...r.kernel.org>,
        Björn Töpel <bjorn.topel@...el.com>,
        Magnus Karlsson <magnus.karlsson@...el.com>
Subject: Re: [PATCH v8 bpf-next 6/7] bpf: allow for tailcalls in BPF
 subprograms for x64 JIT

On Thu, Sep 17, 2020 at 02:03:32PM -0700, Andrii Nakryiko wrote:
> On Wed, Sep 16, 2020 at 3:54 PM Maciej Fijalkowski
> <maciej.fijalkowski@...el.com> wrote:
> >
> > Relax verifier's restriction that was meant to forbid tailcall usage
> > when subprog count was higher than 1.
> >
> > Also, do not max out the stack depth of program that utilizes tailcalls.
> >
> > Signed-off-by: Maciej Fijalkowski <maciej.fijalkowski@...el.com>
> > ---
> 
> Maciej,
> 
> Only patches 6 and 7 arrived (a while ago) and seems like the other
> patches are lost and not going to come. Do you mind resending entire
> patch set?

Sure. Vger lately has been giving me a hard time, thought that maybe rest
of set would eventually arrive, similarly to what Toke experienced I
guess.

> 
> [...]