bpf: Further refactor alloc_bulk().

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In certain scenarios alloc_bulk() might be taking free objects mainly from
free_by_rcu_ttrace list. In such case get_memcg() and set_active_memcg() are
redundant, but they show up in perf profile. Split the loop and only set memcg
when allocating from slab. No performance difference in this patch alone, but
it helps in combination with further patches.

Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Hou Tao <houtao1@huawei.com>
Link: https://lore.kernel.org/bpf/20230706033447.54696-7-alexei.starovoitov@gmail.com

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Alexei Starovoitov 2023-07-05 20:34:39 -07:00 • committed by Daniel Borkmann

parent 18e027b1c7

commit 7468048237

1 changed files with 18 additions and 12 deletions

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kernel/bpf/memalloc.c

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