linux-kernel - Quick review of RCU-related patches in v5.10.8-rt23

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Message-ID: <20210128195037.GA9370@paulmck-ThinkPad-P72>
Date:   Thu, 28 Jan 2021 11:50:37 -0800
From:   "Paul E. McKenney" <paulmck@...nel.org>
To:     bigeasy@...utronix.de
Cc:     rcu@...r.kernel.org, linux-kernel@...r.kernel.org,
        kernel-team@...com, mingo@...nel.org, jiangshanlai@...il.com,
        akpm@...ux-foundation.org, mathieu.desnoyers@...icios.com,
        josh@...htriplett.org, tglx@...utronix.de, peterz@...radead.org,
        rostedt@...dmis.org, dhowells@...hat.com, edumazet@...gle.com,
        fweisbec@...il.com, oleg@...hat.com, joel@...lfernandes.org
Subject: Quick review of RCU-related patches in v5.10.8-rt23

Hello, Sebastian,

Just doing my periodic (but decidedly non-real-time) scan of RCU-related
patches in -rt, in this case v5.10.8-rt23:

db93e2f1b4b0 ("rcu: Prevent false positive softirq warning on RT")
	Looks ready for mainline, given CONFIG_PREEMPT_RT.
f3541b467fbb ("sched: Do not account rcu_preempt_depth on RT in might_sleep()")
	If the scheduler maintainers are OK with their part of this patch,
	looks good to me, given CONFIG_PREEMPT_RT.  Feel free to add:
	Acked-by: Paul E. McKenney <paulmck@...rnel.org>
d8c5a7d75e08 ("rcutorture: Avoid problematic critical section nesting on RT")
	This one I need to understand better.  I do like the use of local
	variables to make the "if" conditions less unruly.

The rest are in -rcu already:

a163ef8687a1 ("rcu: make RCU_BOOST default on RT")
	Commit 2341bc4a0311 in -rcu.  In yesterday's pull request.
5ffd75a96828 ("rcu: Use rcuc threads on PREEMPT_RT as we did")
	Commit 8b9a0ecc7ef5 in -rcu.  In yesterday's pull request.
e0b671bca2e7 ("rcu: enable rcu_normal_after_boot by default for RT")
	Commit 36221e109eb2 in -rcu.  In yesterday's pull request.
e27ef68731a1 ("rcu: Don't invoke try_invoke_on_locked_down_task() with irqs disabled")
	This one is in v5.10 mainline.

Any reason I shouldn't pull in db93e2f1b4b0 ("rcu: Prevent false positive
softirq warning on RT") for v5.13?

							Thanx, Paul