linux-kernel - Re: [PATCH 0/3] tick: Fix softirq related warnings

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Message-ID: <bd2a0eb7-2b0b-bb45-3c58-bfce3049bb94@molgen.mpg.de>
Date:   Mon, 14 Feb 2022 06:46:59 +0100
From:   Paul Menzel <pmenzel@...gen.mpg.de>
To:     Frederic Weisbecker <frederic@...nel.org>
Cc:     "Paul E . McKenney" <paulmck@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/3] tick: Fix softirq related warnings

Dear Frederic,


Am 08.02.22 um 17:16 schrieb Frederic Weisbecker:
> Some cleanups and debug rework.
> 
> git://git.kernel.org/pub/scm/linux/kernel/git/frederic/linux-dynticks.git
> 	timers/core
> 
> HEAD: 18b00369d58da4c73946d5f8ebed8e8c7ade89e2
> 
> Thanks,
> 	Frederic
> ---
> 
> Frederic Weisbecker (3):
>        tick/rcu: Remove obsolete rcu_needs_cpu() parameters
>        tick/rcu: Stop allowing RCU_SOFTIRQ in idle
>        lib/irq_poll: Declare IRQ_POLL softirq vector as ksoftirqd-parking safe
> 
> 
>   include/linux/interrupt.h | 11 ++++++++-
>   include/linux/rcutiny.h   |  3 +--
>   include/linux/rcutree.h   |  2 +-
>   kernel/rcu/tree.c         |  3 +--
>   kernel/time/tick-sched.c  | 60 ++++++++++++++++++++++++++++++++++-------------
>   5 files changed, 57 insertions(+), 22 deletions(-)

I tested this series on the IBM S822LC with Ubuntu 20.10 and rcu/dev 
(commit 0ba8896d2fd7 (lib/irq_poll: Declare IRQ_POLL softirq vector as 
ksoftirqd-parking safe)). Running `sudo ppc64_cpu --smt=off` the 
warnings are gone.

Tested-by: Paul Menzel <pmenzel@...gen.mpg.de>


Kind regards,

Paul