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Date: Mon, 4 Apr 2016 13:52:00 +0900
From: Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com>
To: Petr Mladek <pmladek@suse.com>
Cc: kbuild test robot <lkp@intel.com>, kbuild-all@01.org,
 Andrew Morton <akpm@linux-foundation.org>,
 Peter Zijlstra <peterz@infradead.org>,
 Steven Rostedt <rostedt@goodmis.org>,
 Russell King <rmk+kernel@arm.linux.org.uk>,
 Daniel Thompson <daniel.thompson@linaro.org>,
 Jiri Kosina <jkosina@suse.com>, Ingo Molnar <mingo@redhat.com>,
 Thomas Gleixner <tglx@linutronix.de>,
 Sergey Senozhatsky <sergey.senozhatsky.work@gmail.com>,
 Chris Metcalf <cmetcalf@ezchip.com>, linux-kernel@vger.kernel.org,
 x86@kernel.org, linux-arm-kernel@lists.infradead.org,
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Subject: Re: [PATCH v4 5/5] printk/nmi: flush NMI messages on the system panic
Message-ID: <20160404045200.GE6164@swordfish>
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 <201603310000.dKufp7mg%fengguang.wu@intel.com>
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Hello,

On (03/31/16 14:36), Petr Mladek wrote:
[..]
>  #ifdef CONFIG_PRINTK_NMI
> +#define deferred_console_in_nmi() in_nmi()
>  #else
> +#define deferred_console_in_nmi() 0
[..]
> +	if (!in_sched && !deferred_console_in_nmi()) {
>  		lockdep_off();
>  		/*
>  		 * Try to acquire and then immediately release the console

or use SCHED level for nmi messages instead of defining deferred_console_in_nmi()?
so !in_sched will work for both SCHED and NMI messages.

	-ss