CONFIG_BPF_JIT: Enable BPF Just In Time compiler

General informations

The Linux kernel configuration item CONFIG_BPF_JIT has multiple definitions:

Enable BPF Just In Time compiler found in kernel/bpf/Kconfig

The configuration item CONFIG_BPF_JIT:

• prompt: Enable BPF Just In Time compiler
• type: bool
• depends on: ( CONFIG_BPF ) && ( CONFIG_HAVE_CBPF_JIT || CONFIG_HAVE_EBPF_JIT ) && ( CONFIG_MODULES )
• defined in kernel/bpf/Kconfig
• found in Linux kernels: 5.13–5.19, 6.0–6.8, 6.9-rc+HEAD

Help text

BPF programs are normally handled by a BPF interpreter. This option allows the kernel to generate native code when a program is loaded into the kernel. This will significantly speed-up processing of BPF programs.

Note, an 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)

enable BPF Just In Time compiler found in net/Kconfig

The configuration item CONFIG_BPF_JIT:

• prompt: enable BPF Just In Time compiler
• type: bool
• depends on: ( CONFIG_HAVE_CBPF_JIT || CONFIG_HAVE_EBPF_JIT ) && ( CONFIG_MODULES )
• defined in net/Kconfig
• found in Linux kernels: 3.0–3.19, 4.0–4.20, 5.0–5.12

Help text

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)

Hardware

LKDDb

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Sources

This page is automaticly generated with free (libre, open) software lkddb(see lkddb-sources).

The data is retrived from:

• Linux kernel
• Linux Kernel Driver DataBase (LKDDb)

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