netdev - Re: [PATCH bpf-next] bpf: support bpf_jit_enable=2 for CONFIG_BPF_JIT_ALWAYS

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Message-ID: <CAADnVQLfCq9urgtNuW2dgjUj-wb+AxSj5YzHb4GvSZR-TtZ7kw@mail.gmail.com>
Date:   Fri, 31 Dec 2021 08:32:49 -0800
From:   Alexei Starovoitov <alexei.starovoitov@...il.com>
To:     Hou Tao <houtao1@...wei.com>
Cc:     Alexei Starovoitov <ast@...nel.org>,
        Martin KaFai Lau <kafai@...com>, Yonghong Song <yhs@...com>,
        Daniel Borkmann <daniel@...earbox.net>,
        Andrii Nakryiko <andrii@...nel.org>,
        "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>,
        Network Development <netdev@...r.kernel.org>,
        bpf <bpf@...r.kernel.org>
Subject: Re: [PATCH bpf-next] bpf: support bpf_jit_enable=2 for CONFIG_BPF_JIT_ALWAYS_ON

On Fri, Dec 31, 2021 at 7:20 AM Hou Tao <houtao1@...wei.com> wrote:
>
> bpf_jit_enable=2 is used to dump the jited images for debug purpose,
> however if CONFIG_BPF_JIT_ALWAYS_ON is enabled, its value is fixed
> as one and can not be changed. So make the debug switch work again.
>
> Signed-off-by: Hou Tao <houtao1@...wei.com>

That was discussed in the past:
https://lore.kernel.org/bpf/20210326124030.1138964-1-Jianlin.Lv@arm.com/
The old point stands.