Some more cleanups around bpf_jit_limit to make it readable via sysctl. Jakub raised the point that a sysctl toggle is UAPI and therefore can't be easily changed later on. I tried to find another place to stick the info, but couldn't find a good one. All the current BPF knobs are in sysctl. There are examples of read only sysctls: $ sudo find /proc/sys -perm 0444 | wc -l 90 There are no examples of sysctls with mode 0400 however: $ sudo find /proc/sys -perm 0400 | wc -l 0 Thoughts? Changes in v2: * riscv not sparcv (Luke) * Expose bpf_jit_current in bytes, not pages (Nicholas) Lorenz Bauer (4): bpf: define bpf_jit_alloc_exec_limit for riscv JIT bpf: define bpf_jit_alloc_exec_limit for arm64 JIT bpf: prevent increasing bpf_jit_limit above max bpf: export bpf_jit_current Documentation/admin-guide/sysctl/net.rst | 6 ++++++ arch/arm64/net/bpf_jit_comp.c | 5 +++++ arch/riscv/net/bpf_jit_core.c | 5 +++++ include/linux/filter.h | 2 ++ kernel/bpf/core.c | 7 ++++--- net/core/sysctl_net_core.c | 26 +++++++++++++++++++++++- 6 files changed, 47 insertions(+), 4 deletions(-) -- 2.30.2
