diff options
| author | Yafang Shao <laoar.shao@gmail.com> | 2023-03-05 12:46:08 +0000 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2023-03-07 09:33:42 -0800 |
| commit | c6e66b42a348125fd41131de75f84fa67b6579ce (patch) | |
| tree | 32c27e68a710088ff57c4801c79d35ff5a1290b9 /kernel/bpf/queue_stack_maps.c | |
| parent | fa5e83df173beb6c1334737a463fc2b4ef4efa8b (diff) | |
bpf: queue_stack_maps memory usage
A new helper is introduced to calculate queue_stack_maps memory usage.
The result as follows,
- before
20: queue name count_map flags 0x0
key 0B value 4B max_entries 65536 memlock 266240B
21: stack name count_map flags 0x0
key 0B value 4B max_entries 65536 memlock 266240B
- after
20: queue name count_map flags 0x0
key 0B value 4B max_entries 65536 memlock 524288B
21: stack name count_map flags 0x0
key 0B value 4B max_entries 65536 memlock 524288B
Signed-off-by: Yafang Shao <laoar.shao@gmail.com>
Link: https://lore.kernel.org/r/20230305124615.12358-12-laoar.shao@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'kernel/bpf/queue_stack_maps.c')
| -rw-r--r-- | kernel/bpf/queue_stack_maps.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/kernel/bpf/queue_stack_maps.c b/kernel/bpf/queue_stack_maps.c index 8a5e060de63b..63ecbbcb349d 100644 --- a/kernel/bpf/queue_stack_maps.c +++ b/kernel/bpf/queue_stack_maps.c @@ -246,6 +246,14 @@ static int queue_stack_map_get_next_key(struct bpf_map *map, void *key, return -EINVAL; } +static u64 queue_stack_map_mem_usage(const struct bpf_map *map) +{ + u64 usage = sizeof(struct bpf_queue_stack); + + usage += ((u64)map->max_entries + 1) * map->value_size; + return usage; +} + BTF_ID_LIST_SINGLE(queue_map_btf_ids, struct, bpf_queue_stack) const struct bpf_map_ops queue_map_ops = { .map_meta_equal = bpf_map_meta_equal, @@ -259,6 +267,7 @@ const struct bpf_map_ops queue_map_ops = { .map_pop_elem = queue_map_pop_elem, .map_peek_elem = queue_map_peek_elem, .map_get_next_key = queue_stack_map_get_next_key, + .map_mem_usage = queue_stack_map_mem_usage, .map_btf_id = &queue_map_btf_ids[0], }; @@ -274,5 +283,6 @@ const struct bpf_map_ops stack_map_ops = { .map_pop_elem = stack_map_pop_elem, .map_peek_elem = stack_map_peek_elem, .map_get_next_key = queue_stack_map_get_next_key, + .map_mem_usage = queue_stack_map_mem_usage, .map_btf_id = &queue_map_btf_ids[0], }; |