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| author | Menglong Dong <menglong8.dong@gmail.com> | 2025-08-21 17:06:04 +0800 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2025-08-25 18:52:16 -0700 |
| commit | 8c0afc7c9c112eb6884bc7e443247f242b6d8a3e (patch) | |
| tree | 169b2001eb0ed9b68f6f9d7b9474ec3ef74408ca /kernel/bpf | |
| parent | rcu: add rcu_read_lock_dont_migrate() (diff) | |
| download | linux-8c0afc7c9c112eb6884bc7e443247f242b6d8a3e.tar.gz linux-8c0afc7c9c112eb6884bc7e443247f242b6d8a3e.zip | |
bpf: use rcu_read_lock_dont_migrate() for bpf_cgrp_storage_free()
Use rcu_read_lock_dont_migrate() and rcu_read_unlock_migrate() in
bpf_cgrp_storage_free to obtain better performance when PREEMPT_RCU is
not enabled.
Signed-off-by: Menglong Dong <dongml2@chinatelecom.cn>
Link: https://lore.kernel.org/r/20250821090609.42508-3-dongml2@chinatelecom.cn
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'kernel/bpf')
| -rw-r--r-- | kernel/bpf/bpf_cgrp_storage.c | 6 |
1 files changed, 2 insertions, 4 deletions
diff --git a/kernel/bpf/bpf_cgrp_storage.c b/kernel/bpf/bpf_cgrp_storage.c index 148da8f7ff36..0687a760974a 100644 --- a/kernel/bpf/bpf_cgrp_storage.c +++ b/kernel/bpf/bpf_cgrp_storage.c @@ -45,8 +45,7 @@ void bpf_cgrp_storage_free(struct cgroup *cgroup) { struct bpf_local_storage *local_storage; - migrate_disable(); - rcu_read_lock(); + rcu_read_lock_dont_migrate(); local_storage = rcu_dereference(cgroup->bpf_cgrp_storage); if (!local_storage) goto out; @@ -55,8 +54,7 @@ void bpf_cgrp_storage_free(struct cgroup *cgroup) bpf_local_storage_destroy(local_storage); bpf_cgrp_storage_unlock(); out: - rcu_read_unlock(); - migrate_enable(); + rcu_read_unlock_migrate(); } static struct bpf_local_storage_data * |