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Thu, 14 Aug 2025 23:18:53 -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 5/7] bpf: use rcu_migrate_* for bpf_task_storage_free() Date: Fri, 15 Aug 2025 14:18:22 +0800 Message-ID: <20250815061824.765906-6-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 bpf_task_storage_free to obtain better performance when PREEMPT_RCU is not enabled. Signed-off-by: Menglong Dong --- kernel/bpf/bpf_task_storage.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/kernel/bpf/bpf_task_storage.c b/kernel/bpf/bpf_task_storage.c index 1109475953c0..cbbf1b72eece 100644 --- a/kernel/bpf/bpf_task_storage.c +++ b/kernel/bpf/bpf_task_storage.c @@ -70,7 +70,7 @@ void bpf_task_storage_free(struct task_struct *task) { struct bpf_local_storage *local_storage; =20 - migrate_disable(); + rcu_migrate_disable(); rcu_read_lock(); =20 local_storage =3D rcu_dereference(task->bpf_storage); @@ -82,7 +82,7 @@ void bpf_task_storage_free(struct task_struct *task) bpf_task_storage_unlock(); out: rcu_read_unlock(); - migrate_enable(); + rcu_migrate_enable(); } =20 static void *bpf_pid_task_storage_lookup_elem(struct bpf_map *map, void *k= ey) --=20 2.50.1