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| author | Maryam Tahhan <mtahhan@redhat.com> | 2022-11-07 17:52:07 +0100 |
|---|---|---|
| committer | Andrii Nakryiko <andrii@kernel.org> | 2022-11-11 20:32:54 +0100 |
| commit | 161939abc80ba855ee1739be4a807c6b0f1b8c6c (patch) | |
| tree | 84b5ee3e697a1dd25ebce167b2ea13395f1d7b01 /kernel/bpf/cpumap.c | |
| parent | docs/bpf: Document BPF_MAP_TYPE_LPM_TRIE map (diff) | |
| download | linux-161939abc80ba855ee1739be4a807c6b0f1b8c6c.tar.xz linux-161939abc80ba855ee1739be4a807c6b0f1b8c6c.zip | |
docs/bpf: Document BPF_MAP_TYPE_CPUMAP map
Add documentation for BPF_MAP_TYPE_CPUMAP including
kernel version introduced, usage and examples.
Co-developed-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Maryam Tahhan <mtahhan@redhat.com>
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Acked-by: Yonghong Song <yhs@fb.com>
Link: https://lore.kernel.org/bpf/20221107165207.2682075-2-mtahhan@redhat.com
Diffstat (limited to 'kernel/bpf/cpumap.c')
| -rw-r--r-- | kernel/bpf/cpumap.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/kernel/bpf/cpumap.c b/kernel/bpf/cpumap.c index bb03fdba73bb..6b6a78c04b90 100644 --- a/kernel/bpf/cpumap.c +++ b/kernel/bpf/cpumap.c @@ -4,13 +4,16 @@ * Copyright (c) 2017 Jesper Dangaard Brouer, Red Hat Inc. */ -/* The 'cpumap' is primarily used as a backend map for XDP BPF helper +/** + * DOC: cpu map + * The 'cpumap' is primarily used as a backend map for XDP BPF helper * call bpf_redirect_map() and XDP_REDIRECT action, like 'devmap'. * - * Unlike devmap which redirects XDP frames out another NIC device, + * Unlike devmap which redirects XDP frames out to another NIC device, * this map type redirects raw XDP frames to another CPU. The remote * CPU will do SKB-allocation and call the normal network stack. - * + */ +/* * This is a scalability and isolation mechanism, that allow * separating the early driver network XDP layer, from the rest of the * netstack, and assigning dedicated CPUs for this stage. This |