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| author | Alexei Starovoitov <ast@kernel.org> | 2022-09-02 14:10:52 -0700 |
|---|---|---|
| committer | Daniel Borkmann <daniel@iogearbox.net> | 2022-09-05 15:33:06 +0200 |
| commit | 4ab67149f3c6e97c5c506a726f0ebdec38241679 (patch) | |
| tree | cef5bd8102787075a2766028587d49a917053433 /include | |
| parent | 8d5a8011b35d387c490a5c977b1d9eb4798aa071 (diff) | |
| download | linux-4ab67149f3c6e97c5c506a726f0ebdec38241679.tar.gz | |
bpf: Add percpu allocation support to bpf_mem_alloc.
Extend bpf_mem_alloc to cache free list of fixed size per-cpu allocations.
Once such cache is created bpf_mem_cache_alloc() will return per-cpu objects.
bpf_mem_cache_free() will free them back into global per-cpu pool after
observing RCU grace period.
per-cpu flavor of bpf_mem_alloc is going to be used by per-cpu hash maps.
The free list cache consists of tuples { llist_node, per-cpu pointer }
Unlike alloc_percpu() that returns per-cpu pointer
the bpf_mem_cache_alloc() returns a pointer to per-cpu pointer and
bpf_mem_cache_free() expects to receive it back.
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
Acked-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20220902211058.60789-11-alexei.starovoitov@gmail.com
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/bpf_mem_alloc.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/bpf_mem_alloc.h b/include/linux/bpf_mem_alloc.h index 804733070f8d..653ed1584a03 100644 --- a/include/linux/bpf_mem_alloc.h +++ b/include/linux/bpf_mem_alloc.h @@ -12,7 +12,7 @@ struct bpf_mem_alloc { struct bpf_mem_cache __percpu *cache; }; -int bpf_mem_alloc_init(struct bpf_mem_alloc *ma, int size); +int bpf_mem_alloc_init(struct bpf_mem_alloc *ma, int size, bool percpu); void bpf_mem_alloc_destroy(struct bpf_mem_alloc *ma); /* kmalloc/kfree equivalent: */ |