[PATCH net-next 0/4] bpf: bpf_htab: Add BPF_MAP_TYPE_PERCPU_HASH

From	Martin KaFai Lau <kafai@fb.com>
Newsgroups	linux.kernel
Subject	[PATCH net-next 0/4] bpf: bpf_htab: Add BPF_MAP_TYPE_PERCPU_HASH
Date	2016-01-07 23:40 +0100
Message-ID	<qOrnQ-63O-5@gated-at.bofh.it> (permalink)
Organization	linux.* mail to news gateway

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This patchset adds BPF_MAP_TYPE_PERCPU_HASH map type which allows
percpu value.

BPF + kprobe is very useful in statistics collection.  In particular,
bpf is strong in doing aggregation within the kernel instead of
outputting a lot of raw samples to the userspace.

In some cases, bumping a counter/value of a particular key will have
noticeable impact.  For example, doing statistics collection
on received packets and aggregating them by network
prefix (like /64 in IPv6).  Having a percpu value can help.

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[PATCH net-next 0/4] bpf: bpf_htab: Add BPF_MAP_TYPE_PERCPU_HASH Martin KaFai Lau <kafai@fb.com> - 2016-01-07 23:40 +0100
  [PATCH net-next 3/4] bpf: bpf_htab: Add syscall to iterate percpu value of a key Martin KaFai Lau <kafai@fb.com> - 2016-01-07 23:40 +0100
  [PATCH net-next 2/4] bpf: bpf_htab: Add BPF_MAP_TYPE_PERCPU_HASH Martin KaFai Lau <kafai@fb.com> - 2016-01-07 23:40 +0100
    Re: [PATCH net-next 2/4] bpf: bpf_htab: Add BPF_MAP_TYPE_PERCPU_HASH Ming Lei <tom.leiming@gmail.com> - 2016-01-09 11:10 +0100
      Re: [PATCH net-next 2/4] bpf: bpf_htab: Add BPF_MAP_TYPE_PERCPU_HASH Martin KaFai Lau <kafai@fb.com> - 2016-01-12 04:20 +0100
        Re: [PATCH net-next 2/4] bpf: bpf_htab: Add BPF_MAP_TYPE_PERCPU_HASH Martin KaFai Lau <kafai@fb.com> - 2016-01-12 08:50 +0100
    Re: [PATCH net-next 2/4] bpf: bpf_htab: Add BPF_MAP_TYPE_PERCPU_HASH Ming Lei <tom.leiming@gmail.com> - 2016-01-09 11:40 +0100
  Re: [PATCH net-next 0/4] bpf: bpf_htab: Add BPF_MAP_TYPE_PERCPU_HASH Ming Lei <tom.leiming@gmail.com> - 2016-01-08 08:00 +0100
    Re: [PATCH net-next 0/4] bpf: bpf_htab: Add BPF_MAP_TYPE_PERCPU_HASH Martin KaFai Lau <kafai@fb.com> - 2016-01-09 01:50 +0100
      Re: [PATCH net-next 0/4] bpf: bpf_htab: Add BPF_MAP_TYPE_PERCPU_HASH Ming Lei <tom.leiming@gmail.com> - 2016-01-09 10:50 +0100
        Re: [PATCH net-next 0/4] bpf: bpf_htab: Add BPF_MAP_TYPE_PERCPU_HASH Martin KaFai Lau <kafai@fb.com> - 2016-01-10 03:40 +0100
          Re: [PATCH net-next 0/4] bpf: bpf_htab: Add BPF_MAP_TYPE_PERCPU_HASH Ming Lei <tom.leiming@gmail.com> - 2016-01-11 03:30 +0100
            Re: [PATCH net-next 0/4] bpf: bpf_htab: Add BPF_MAP_TYPE_PERCPU_HASH Martin KaFai Lau <kafai@fb.com> - 2016-01-11 23:40 +0100
              Re: [PATCH net-next 0/4] bpf: bpf_htab: Add BPF_MAP_TYPE_PERCPU_HASH Ming Lei <tom.leiming@gmail.com> - 2016-01-12 06:50 +0100
                Re: [PATCH net-next 0/4] bpf: bpf_htab: Add BPF_MAP_TYPE_PERCPU_HASH Alexei Starovoitov <alexei.starovoitov@gmail.com> - 2016-01-12 07:10 +0100

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