bpf: Adjust low/high watermarks in bpf_mem_cache

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The same low/high watermarks for every bucket in bpf_mem_cache consume
significant amount of memory. Preallocating 64 elements of 4096 bytes each in
the free list is not efficient. Make low/high watermarks and batching value
dependent on element size. This change brings significant memory savings.

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/20220902211058.60789-9-alexei.starovoitov@gmail.com

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Alexei Starovoitov 2022-09-02 14:10:50 -07:00 • committed by Daniel Borkmann

parent 0fd7c5d433

commit 7c266178aa

1 changed files with 36 additions and 14 deletions

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kernel/bpf/memalloc.c

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