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Thu, 14 Aug 2025 23:19:02 -0700 (PDT) From: Menglong Dong X-Google-Original-From: Menglong Dong To: ast@kernel.org Cc: daniel@iogearbox.net, john.fastabend@gmail.com, andrii@kernel.org, martin.lau@linux.dev, eddyz87@gmail.com, song@kernel.org, yonghong.song@linux.dev, kpsingh@kernel.org, sdf@fomichev.me, haoluo@google.com, jolsa@kernel.org, bpf@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH bpf-next 7/7] bpf: use rcu_migrate_* for trampoline.c Date: Fri, 15 Aug 2025 14:18:24 +0800 Message-ID: <20250815061824.765906-8-dongml2@chinatelecom.cn> X-Mailer: git-send-email 2.50.1 In-Reply-To: <20250815061824.765906-1-dongml2@chinatelecom.cn> References: <20250815061824.765906-1-dongml2@chinatelecom.cn> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Replace the migrate_disable/migrate_enable with rcu_migrate_disable/rcu_migrate_enable in trampoline.c to obtain better performance when PREEMPT_RCU is not enabled. Signed-off-by: Menglong Dong --- kernel/bpf/trampoline.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/kernel/bpf/trampoline.c b/kernel/bpf/trampoline.c index 0e364614c3a2..a0608152c394 100644 --- a/kernel/bpf/trampoline.c +++ b/kernel/bpf/trampoline.c @@ -900,7 +900,7 @@ static u64 notrace __bpf_prog_enter_recur(struct bpf_pr= og *prog, struct bpf_tram __acquires(RCU) { rcu_read_lock(); - migrate_disable(); + rcu_migrate_disable(); =20 run_ctx->saved_run_ctx =3D bpf_set_run_ctx(&run_ctx->run_ctx); =20 @@ -949,7 +949,7 @@ static void notrace __bpf_prog_exit_recur(struct bpf_pr= og *prog, u64 start, =20 update_prog_stats(prog, start); this_cpu_dec(*(prog->active)); - migrate_enable(); + rcu_migrate_enable(); rcu_read_unlock(); } =20 @@ -961,7 +961,7 @@ static u64 notrace __bpf_prog_enter_lsm_cgroup(struct b= pf_prog *prog, * programs, not the shims. */ rcu_read_lock(); - migrate_disable(); + rcu_migrate_disable(); =20 run_ctx->saved_run_ctx =3D bpf_set_run_ctx(&run_ctx->run_ctx); =20 @@ -974,7 +974,7 @@ static void notrace __bpf_prog_exit_lsm_cgroup(struct b= pf_prog *prog, u64 start, { bpf_reset_run_ctx(run_ctx->saved_run_ctx); =20 - migrate_enable(); + rcu_migrate_enable(); rcu_read_unlock(); } =20 @@ -1034,7 +1034,7 @@ static u64 notrace __bpf_prog_enter(struct bpf_prog *= prog, __acquires(RCU) { rcu_read_lock(); - migrate_disable(); + rcu_migrate_disable(); =20 run_ctx->saved_run_ctx =3D bpf_set_run_ctx(&run_ctx->run_ctx); =20 @@ -1048,7 +1048,7 @@ static void notrace __bpf_prog_exit(struct bpf_prog *= prog, u64 start, bpf_reset_run_ctx(run_ctx->saved_run_ctx); =20 update_prog_stats(prog, start); - migrate_enable(); + rcu_migrate_enable(); rcu_read_unlock(); } =20 --=20 2.50.1