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Tue, 14 Oct 2025 04:26:50 -0700 (PDT) Received: from 7950hx ([43.129.244.20]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-29034e2062fsm161807285ad.48.2025.10.14.04.26.44 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 14 Oct 2025 04:26:50 -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 0/4] bpf: add and use migrate_enable_rcu Date: Tue, 14 Oct 2025 19:26:36 +0800 Message-ID: <20251014112640.261770-1-dongml2@chinatelecom.cn> X-Mailer: git-send-email 2.51.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit For now, we can use rcu_read_lock_dont_migrate() for the case that call both rcu_read_lock() and migrate_disable(). However, sometimes they can be called separately. Therefore, we factor out migrate_enable_rcu and migrate_disable_rcu from rcu_read_lock_dont_migrate and rcu_read_unlock_migrate. And we introduce the function bpf_prog_run_pin_on_cpu_rcu(), which is similar to bpf_prog_run_pin_on_cpu() but use migrate_disable_rcu/migrate_enable_rcu instead. The function bpf_prog_run_pin_on_cpu_rcu() is used in following functions: sk_psock_msg_verdict sk_psock_tls_strp_read sk_psock_strp_read sk_psock_strp_parse sk_psock_verdict_recv bpf_prog_run_clear_cb Menglong Dong (4): rcu: factor out migrate_enable_rcu and migrate_disable_rcu bpf: introduce bpf_prog_run_pin_on_cpu_rcu() bpf: use bpf_prog_run_pin_on_cpu_rcu() in skmsg.c bpf: use bpf_prog_run_pin_on_cpu_rcu() in bpf_prog_run_clear_cb include/linux/filter.h | 16 +++++++++++++++- include/linux/rcupdate.h | 18 +++++++++++++++--- net/core/skmsg.c | 10 +++++----- 3 files changed, 35 insertions(+), 9 deletions(-) -- 2.51.0