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| author |   Tianchen Ding <dtcccc@linux.alibaba.com> | 2024-10-17 10:44:12 +0800 |
|---|---|---|
| committer |   Tejun Heo <tj@kernel.org> | 2024-10-17 05:53:17 -1000 |
| commit | ba1c9d327e7ffb7b931fc2b5209aae532ffee5a5 (patch) | |
| tree | a25aed3b0fb1e60008c5c76371052a2e75249ff8 | |
| parent | sched/ext: Use tg_cgroup() to elieminate duplicate code (diff) | |
| download | linux-rng-ba1c9d327e7ffb7b931fc2b5209aae532ffee5a5.tar.xz linux-rng-ba1c9d327e7ffb7b931fc2b5209aae532ffee5a5.zip | |
sched_ext: Use btf_ids to resolve task_struct
Save the searching time during bpf_scx_init.
Signed-off-by: Tianchen Ding <dtcccc@linux.alibaba.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
| -rw-r--r-- | kernel/sched/ext.c | 11 |
1 files changed, 2 insertions, 9 deletions
diff --git a/kernel/sched/ext.c b/kernel/sched/ext.c index fe8acae35166..06c45d6c5be1 100644 --- a/kernel/sched/ext.c +++ b/kernel/sched/ext.c @@ -5324,7 +5324,6 @@ err_disable: extern struct btf *btf_vmlinux; static const struct btf_type *task_struct_type; -static u32 task_struct_type_id; static bool set_arg_maybe_null(const char *op, int arg_n, int off, int size, enum bpf_access_type type, @@ -5376,7 +5375,7 @@ static bool set_arg_maybe_null(const char *op, int arg_n, int off, int size, */ info->reg_type = PTR_MAYBE_NULL | PTR_TO_BTF_ID | PTR_TRUSTED; info->btf = btf_vmlinux; - info->btf_id = task_struct_type_id; + info->btf_id = btf_tracing_ids[BTF_TRACING_TYPE_TASK]; return true; } @@ -5528,13 +5527,7 @@ static void bpf_scx_unreg(void *kdata, struct bpf_link *link) static int bpf_scx_init(struct btf *btf) { - s32 type_id; - - type_id = btf_find_by_name_kind(btf, "task_struct", BTF_KIND_STRUCT); - if (type_id < 0) - return -EINVAL; - task_struct_type = btf_type_by_id(btf, type_id); - task_struct_type_id = type_id; + task_struct_type = btf_type_by_id(btf, btf_tracing_ids[BTF_TRACING_TYPE_TASK]); return 0; } |