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From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
To: John Ogness <john.ogness@linutronix.de>
Cc: chao.qin@intel.com, linux-kernel@vger.kernel.org,
	linux-rt-users@vger.kernel.org, tglx@linutronix.de,
	rostedt@goodmis.org, mgross@linux.intel.com, paul.mei@intel.com,
	lili.li@intel.com
Subject: Re: [PREEMPT_RT][PATCH] printk: Enhance the condition check of msleep in pr_flush()
Date: Mon, 2 Aug 2021 08:48:39 +0200	[thread overview]
Message-ID: <20210802064839.eukhmuxxv76uij3j@linutronix.de> (raw)
In-Reply-To: <87k0l7svu5.fsf@jogness.linutronix.de>

On 2021-07-30 16:52:42 [+0206], John Ogness wrote:
> On 2021-07-30, Sebastian Andrzej Siewior <bigeasy@linutronix.de> wrote:
> > I don't have more context but scheduling should work starting with
> > SYSTEM_SCHEDULING.
> 
> I also thought this, but a quick test shows that is not the case. For
> example, init/main.c:kernel_init() is called in preemptible context, but
> msleep() will hang if called at the beginning of that function.

hmm. So the timer device is missing. Everything else is fine.

> John Ogness

Sebastian

  parent reply	other threads:[~2021-08-02  6:48 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-19  2:26 chao.qin
2021-07-19 14:55 ` John Ogness
2021-07-30 14:01   ` Sebastian Andrzej Siewior
2021-07-30 14:46     ` John Ogness
2021-08-02  6:08       ` Qin, Chao
2021-08-02  6:48       ` Sebastian Andrzej Siewior [this message]
2021-07-20 11:55 ` Joe Perches
2021-07-20 14:03   ` John Ogness
2021-07-21  1:42     ` Qin, Chao
2021-08-05  3:01     ` Qin, Chao
2021-08-05 12:21       ` John Ogness
2021-08-05 16:12         ` Steven Rostedt
2021-08-06 18:34           ` Steven Rostedt

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