netdev - Re: [PATCH v3 bpf-next 12/18] bpf: Reserve space for BPF trampoline in BPF programs

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Message-ID: <04BE1B28-327C-4843-8E73-0DCA3971C144@fb.com>
Date:   Fri, 8 Nov 2019 07:25:42 +0000
From:   Song Liu <songliubraving@...com>
To:     Alexei Starovoitov <ast@...nel.org>
CC:     David Miller <davem@...emloft.net>,
        "daniel@...earbox.net" <daniel@...earbox.net>,
        "x86@...nel.org" <x86@...nel.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "bpf@...r.kernel.org" <bpf@...r.kernel.org>,
        Kernel Team <Kernel-team@...com>
Subject: Re: [PATCH v3 bpf-next 12/18] bpf: Reserve space for BPF trampoline
 in BPF programs



> On Nov 7, 2019, at 10:40 PM, Alexei Starovoitov <ast@...nel.org> wrote:
> 
> BPF trampoline can be made to work with existing 5 bytes of BPF program
> prologue, but let's add 5 bytes of NOPs to the beginning of every JITed BPF
> program to make BPF trampoline job easier. They can be removed in the future.
> 
> Signed-off-by: Alexei Starovoitov <ast@...nel.org>
> Acked-by: Andrii Nakryiko <andriin@...com>

Acked-by: Song Liu <songliubraving@...com>