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Date:	Tue, 26 Aug 2014 10:02:31 +0200
From:	Ingo Molnar <>
To:	Daniel Borkmann <>
Cc:	Alexei Starovoitov <>,
	Stephen Hemminger <>,
	"David S. Miller" <>,
	Linus Torvalds <>,
	Andy Lutomirski <>,
	Steven Rostedt <>,
	Chema Gonzalez <>,
	Eric Dumazet <>,
	Peter Zijlstra <>,
	Brendan Gregg <>,
	Namhyung Kim <>,
	"H. Peter Anvin" <>,
	Andrew Morton <>,
	Kees Cook <>,
	Linux API <>,
	Network Development <>,
	LKML <>
Subject: Re: [PATCH v6 net-next 4/6] bpf: enable bpf syscall on x64 and i386

* Daniel Borkmann <> wrote:

> On 08/26/2014 09:46 AM, Ingo Molnar wrote:
> >* Alexei Starovoitov <> wrote:
> >>On Mon, Aug 25, 2014 at 8:52 PM, Stephen Hemminger
> >><> wrote:
> >>>Per discussion at Kernel Summit. Every new syscall requires
> >>>a manual page and test programs. We have had too many new syscalls
> >>>that are DOA.
> >>
> >>There is verifier testsuite that is testing eBPF verifier from userspace
> >>via bpf syscall. Also there are multiple examples and libbpf.
> >>I think test coverage for bpf syscall is quite substantial already.
> >
> >This is in tools/bpf/, right?
> No, it contains a BPF JIT disasm, bpf assembler and a debugger, 
> but the last two are for the 'classic' BPF interface only. 
> There's a test suite for BPF/eBPF in general under 
> lib/test_bpf.c, but so far it tests only the current code w/o 
> eBPF verifier.
> That said, I think Alexei is referring to the examples et al 
> from the bigger previous proposed patch set.

I mean, if all the testing already exists, it should be part of 
an initial submission and such.


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