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From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
To: John Ogness <john.ogness@linutronix.de>
Cc: xu xin <xu.xin.sc@gmail.com>, xu.xin16@zte.com.cn,
	linux-kernel@vger.kernel.org, linux-rt-users@vger.kernel.org,
	liu.chun2@zte.com.cn, rostedt@goodmis.org, si.hao@zte.com.cn,
	yang.yang29@zte.com.cn, zhang.yunkai@zte.com.cn
Subject: Re: [PATCH  5.10-rt] printk: ignore that console preempted by
 irq/softirq
Message-ID: <20240612143335.1smVOgke@linutronix.de>
References: <20240523235537910_yxfGMbTcSOmMkcfuK2d8@zte.com.cn>
 <20240528064003.776618-1-xu.xin16@zte.com.cn>
 <20240528152933.ns7uyFSD@linutronix.de>
 <87cyoxeqh4.fsf@jogness.linutronix.de>
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In-Reply-To: <87cyoxeqh4.fsf@jogness.linutronix.de>

On 2024-06-03 22:17:35 [+0206], John Ogness wrote:
> On 2024-05-28, Sebastian Andrzej Siewior <bigeasy@linutronix.de> wrote:
> > There is a `may_sleep` variable set earlier. Couldn't that be re-used?
> 
> Since the printing thread cannot preempt the softirq context and since
> the printing threads are not started before @system_state is
> SYSTEM_RUNNING, using @may_sleep is OK.

will there be a repost?

> if (!may_sleep &&
>     con->thread &&
>     task_cpu(con->thread) == smp_processor_id()) {
> 	continue;
> }
> 
> John Ogness

Sebastian