bpf, net: xskmap memory usage
A new helper is introduced to calculate xskmap memory usage. The xfsmap memory usage can be dynamically changed when we add or remove a xsk_map_node. Hence we need to track the count of xsk_map_node to get its memory usage. The result as follows, - before 10: xskmap name count_map flags 0x0 key 4B value 4B max_entries 65536 memlock 524288B - after 10: xskmap name count_map flags 0x0 <<< no elements case key 4B value 4B max_entries 65536 memlock 524608B Signed-off-by: Yafang Shao <laoar.shao@gmail.com> Link: https://lore.kernel.org/r/20230305124615.12358-17-laoar.shao@gmail.comSigned-off-by: Alexei Starovoitov <ast@kernel.org>
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