default or selected kernelversion does not have config value CONFIG_BPF_JIT.
Result is shown for kernelversion 6.9.9
enable BPF Just In Time compiler
modulename: bpf_jit_comp.ko
and/orbpf_jit_32.ko
and/orbpf_jit_comp32.ko
and/orbpf_jit_asm_32.ko
and/orbpf_jit_comp64.ko
and/orbpf_jit_asm.ko
configname: CONFIG_BPF_JIT
Linux Kernel Configuration
└─>Networking support
└─>Networking options
└─>enable BPF Just In Time compiler
In linux kernel since version 3 (release Date: 2011-07-21)
Berkeley Packet Filter filtering capabilities are normally handled
by an interpreter. This option allows kernel to generate a native
code when filter is loaded in memory. This should speedup
packet sniffing (libpcap/tcpdump).
Note, admin should enable this feature changing:
/proc/sys/net/core/bpf_jit_enable
/proc/sys/net/core/bpf_jit_harden (optional)
/proc/sys/net/core/bpf_jit_kallsyms (optional)
by an interpreter. This option allows kernel to generate a native
code when filter is loaded in memory. This should speedup
packet sniffing (libpcap/tcpdump).
Note, admin should enable this feature changing:
/proc/sys/net/core/bpf_jit_enable
/proc/sys/net/core/bpf_jit_harden (optional)
/proc/sys/net/core/bpf_jit_kallsyms (optional)