diff options
| author | Menglong Dong <menglong8.dong@gmail.com> | 2025-08-21 17:06:08 +0800 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2025-08-25 18:52:16 -0700 |
| commit | 427a36bb5504e0fb33398a4ccd523fce95514d83 (patch) | |
| tree | 4e3441a322a3798ed8ea922f759f8c1bc9faddfb | |
| parent | cf4303b70dfa0163753e9b03ca78e5122727d4b8 (diff) | |
bpf: use rcu_read_lock_dont_migrate() for bpf_prog_run_array_cg()
Use rcu_read_lock_dont_migrate() and rcu_read_unlock_migrate() in
bpf_prog_run_array_cg to obtain better performance when PREEMPT_RCU is
not enabled.
Signed-off-by: Menglong Dong <dongml2@chinatelecom.cn>
Link: https://lore.kernel.org/r/20250821090609.42508-7-dongml2@chinatelecom.cn
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
| -rw-r--r-- | kernel/bpf/cgroup.c | 6 |
1 files changed, 2 insertions, 4 deletions
diff --git a/kernel/bpf/cgroup.c b/kernel/bpf/cgroup.c index 180b630279b9..9912c7b9a266 100644 --- a/kernel/bpf/cgroup.c +++ b/kernel/bpf/cgroup.c @@ -71,8 +71,7 @@ bpf_prog_run_array_cg(const struct cgroup_bpf *cgrp, u32 func_ret; run_ctx.retval = retval; - migrate_disable(); - rcu_read_lock(); + rcu_read_lock_dont_migrate(); array = rcu_dereference(cgrp->effective[atype]); item = &array->items[0]; old_run_ctx = bpf_set_run_ctx(&run_ctx.run_ctx); @@ -88,8 +87,7 @@ bpf_prog_run_array_cg(const struct cgroup_bpf *cgrp, item++; } bpf_reset_run_ctx(old_run_ctx); - rcu_read_unlock(); - migrate_enable(); + rcu_read_unlock_migrate(); return run_ctx.retval; } |