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Tue, 14 Oct 2025 04:27:02 -0700 (PDT) From: Menglong Dong X-Google-Original-From: Menglong Dong To: ast@kernel.org, paulmck@kernel.org Cc: daniel@iogearbox.net, andrii@kernel.org, martin.lau@linux.dev, eddyz87@gmail.com, song@kernel.org, yonghong.song@linux.dev, john.fastabend@gmail.com, kpsingh@kernel.org, sdf@fomichev.me, haoluo@google.com, jolsa@kernel.org, jakub@cloudflare.com, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, horms@kernel.org, jiang.biao@linux.dev, bpf@vger.kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org Subject: [PATCH bpf-next 2/4] bpf: introduce bpf_prog_run_pin_on_cpu_rcu() Date: Tue, 14 Oct 2025 19:26:38 +0800 Message-ID: <20251014112640.261770-3-dongml2@chinatelecom.cn> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20251014112640.261770-1-dongml2@chinatelecom.cn> References: <20251014112640.261770-1-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" Introduce bpf_prog_run_pin_on_cpu_rcu(), which will be called with rcu_read_lock. migrate_disable_rcu and migrate_enable_rcu are used to get better performance when CONFIG_PREEMPT_RCU is not enabled. Signed-off-by: Menglong Dong --- include/linux/filter.h | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/include/linux/filter.h b/include/linux/filter.h index f5c859b8131a..48eb42358543 100644 --- a/include/linux/filter.h +++ b/include/linux/filter.h @@ -747,6 +747,18 @@ static inline u32 bpf_prog_run_pin_on_cpu(const struct= bpf_prog *prog, return ret; } =20 +/* The same as bpf_prog_run_pin_on_cpu, except rcu_read_lock should be hel= d */ +static inline u32 bpf_prog_run_pin_on_cpu_rcu(const struct bpf_prog *prog, + const void *ctx) +{ + u32 ret; + + migrate_disable_rcu(); + ret =3D bpf_prog_run(prog, ctx); + migrate_enable_rcu(); + return ret; +} + #define BPF_SKB_CB_LEN QDISC_CB_PRIV_LEN =20 struct bpf_skb_data_end { --=20 2.51.0