linux-kernel - Re: [PATCH rcu 11/12] torture: Flush printk() buffers before powering off

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Message-ID: <8735fyc42v.fsf@jogness.linutronix.de>
Date:   Tue, 21 Jun 2022 01:29:04 +0206
From:   John Ogness <john.ogness@...utronix.de>
To:     "Paul E. McKenney" <paulmck@...nel.org>, rcu@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, kernel-team@...com,
        rostedt@...dmis.org, "Paul E. McKenney" <paulmck@...nel.org>
Subject: Re: [PATCH rcu 11/12] torture: Flush printk() buffers before
 powering off

On 2022-06-20, "Paul E. McKenney" <paulmck@...nel.org> wrote:
> The rcutorture test suite produces quite a bit of console output
> at the end of a test.  This means that the new printk() kthreads
> are likely to be in the process of flushing output at the time of
> the torture_shutdown() function's call to kernel_power_off().
>
> This commit therefore invokes pr_flush(1000, true) to flush this
> pending console output before invoking kernel_power_off().
>
> Fixes: 8e274732115f ("printk: extend console_lock for per-console locking")
> Cc: John Ogness <john.ogness@...utronix.de>
> Signed-off-by: Paul E. McKenney <paulmck@...nel.org>

Reviewed-by: John Ogness <john.ogness@...utronix.de>