This patchset tries to add a new bpf prog type and use it to select a victim memcg when global OOM is invoked. The mainly motivation is the need to customizable OOM victim selection functionality so that we can protect more important app from OOM killer. Chuyi Zhou (5): bpf: Introduce BPF_PROG_TYPE_OOM_POLICY mm: Select victim memcg using bpf prog libbpf, bpftool: Support BPF_PROG_TYPE_OOM_POLICY bpf: Add a new bpf helper to get cgroup ino bpf: Sample BPF program to set oom policy include/linux/bpf_oom.h | 22 ++++ include/linux/bpf_types.h | 2 + include/linux/memcontrol.h | 6 ++ include/uapi/linux/bpf.h | 21 ++++ kernel/bpf/core.c | 1 + kernel/bpf/helpers.c | 17 +++ kernel/bpf/syscall.c | 10 ++ mm/memcontrol.c | 50 +++++++++ mm/oom_kill.c | 185 +++++++++++++++++++++++++++++++++ samples/bpf/Makefile | 3 + samples/bpf/oom_kern.c | 42 ++++++++ samples/bpf/oom_user.c | 128 +++++++++++++++++++++++ tools/bpf/bpftool/common.c | 1 + tools/include/uapi/linux/bpf.h | 21 ++++ tools/lib/bpf/libbpf.c | 3 + tools/lib/bpf/libbpf_probes.c | 2 + 16 files changed, 514 insertions(+) create mode 100644 include/linux/bpf_oom.h create mode 100644 samples/bpf/oom_kern.c create mode 100644 samples/bpf/oom_user.c -- 2.20.1
