linux-kernel - Re: [PATCH bpf-next v3 0/7] bpf: introduce and use rcu_read_lock_dont

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Message-Id: 
 <175618681450.3665841.12074652835342270974.git-patchwork-notify@kernel.org>
Date: Tue, 26 Aug 2025 05:40:14 +0000
From: patchwork-bot+netdevbpf@...nel.org
To: Menglong Dong <menglong8.dong@...il.com>
Cc: ast@...nel.org, paulmck@...nel.org, frederic@...nel.org,
 neeraj.upadhyay@...nel.org, joelagnelf@...dia.com, josh@...htriplett.org,
 boqun.feng@...il.com, urezki@...il.com, rostedt@...dmis.org,
 mathieu.desnoyers@...icios.com, jiangshanlai@...il.com,
 qiang.zhang@...ux.dev, daniel@...earbox.net, john.fastabend@...il.com,
 andrii@...nel.org, martin.lau@...ux.dev, eddyz87@...il.com, song@...nel.org,
 yonghong.song@...ux.dev, kpsingh@...nel.org, sdf@...ichev.me,
 haoluo@...gle.com, jolsa@...nel.org, rcu@...r.kernel.org,
 linux-kernel@...r.kernel.org, bpf@...r.kernel.org
Subject: Re: [PATCH bpf-next v3 0/7] bpf: introduce and use
 rcu_read_lock_dont_migrate

Hello:

This series was applied to bpf/bpf-next.git (master)
by Alexei Starovoitov <ast@...nel.org>:

On Thu, 21 Aug 2025 17:06:02 +0800 you wrote:
> migrate_disable() and rcu_read_lock() are used to together in many case in
> bpf. However, when PREEMPT_RCU is not enabled, rcu_read_lock() will
> disable preemption, which indicate migrate_disable(), so we don't need to
> call it in this case.
> 
> In this series, we introduce rcu_read_lock_dont_migrate and
> rcu_read_unlock_migrate, which will call migrate_disable and
> migrate_enable only when PREEMPT_RCU enabled. And use
> rcu_read_lock_dont_migrate in bpf subsystem.
> 
> [...]

Here is the summary with links:
  - [bpf-next,v3,1/7] rcu: add rcu_read_lock_dont_migrate()
    https://git.kernel.org/bpf/bpf-next/c/1b93c03fb319
  - [bpf-next,v3,2/7] bpf: use rcu_read_lock_dont_migrate() for bpf_cgrp_storage_free()
    https://git.kernel.org/bpf/bpf-next/c/8c0afc7c9c11
  - [bpf-next,v3,3/7] bpf: use rcu_read_lock_dont_migrate() for bpf_inode_storage_free()
    https://git.kernel.org/bpf/bpf-next/c/f2fa9b906911
  - [bpf-next,v3,4/7] bpf: use rcu_read_lock_dont_migrate() for bpf_iter_run_prog()
    https://git.kernel.org/bpf/bpf-next/c/68748f0397a3
  - [bpf-next,v3,5/7] bpf: use rcu_read_lock_dont_migrate() for bpf_task_storage_free()
    https://git.kernel.org/bpf/bpf-next/c/cf4303b70dfa
  - [bpf-next,v3,6/7] bpf: use rcu_read_lock_dont_migrate() for bpf_prog_run_array_cg()
    https://git.kernel.org/bpf/bpf-next/c/427a36bb5504
  - [bpf-next,v3,7/7] bpf: use rcu_read_lock_dont_migrate() for trampoline.c
    https://git.kernel.org/bpf/bpf-next/c/8e4f0b1ebcf2

You are awesome, thank you!
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