On Fri, Mar 26, 2021 at 5:40 AM Jianlin Lv <Jianlin.Lv@xxxxxxx> wrote:
>
> When CONFIG_BPF_JIT_ALWAYS_ON is enabled, the value of bpf_jit_enable in
> /proc/sys is limited to SYSCTL_ONE. This is not convenient for debugging.
> This patch modifies the value of extra2 (max) to 2 that support developers
> to emit traces on kernel log.
>
> Signed-off-by: Jianlin Lv <Jianlin.Lv@xxxxxxx>
> ---
> net/core/sysctl_net_core.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/net/core/sysctl_net_core.c b/net/core/sysctl_net_core.c
> index d84c8a1b280e..aa16883ac445 100644
> --- a/net/core/sysctl_net_core.c
> +++ b/net/core/sysctl_net_core.c
> @@ -386,7 +386,7 @@ static struct ctl_table net_core_table[] = {
> .proc_handler = proc_dointvec_minmax_bpf_enable,
> # ifdef CONFIG_BPF_JIT_ALWAYS_ON
> .extra1 = SYSCTL_ONE,
> - .extra2 = SYSCTL_ONE,
> + .extra2 = &two,
"bpftool prog dump jited" is much better way to examine JITed dumps.
I'd rather remove bpf_jit_enable=2 altogether.
