linux-kernel - Re: [GIT PULL] printk: Support for full dynticks mode

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Message-Id: <20130204172001.8bb358b0.akpm@linux-foundation.org>
Date:	Mon, 4 Feb 2013 17:20:01 -0800
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Frederic Weisbecker <fweisbec@...il.com>
Cc:	Ingo Molnar <mingo@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Paul Gortmaker <paul.gortmaker@...driver.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Steven Rostedt <rostedt@...dmis.org>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [GIT PULL] printk: Support for full dynticks mode

On Tue,  5 Feb 2013 01:51:18 +0100
Frederic Weisbecker <fweisbec@...il.com> wrote:

>       printk: Wake up klogd using irq_work

That seems reasonable.

I'm wondering if we can now remove the printk_sched() special-case. 
iirc, that was needed because wake_up(klogd) would deadlock when called
from sched internals.  But now that wakeup is punted to the timer tick,
perhaps this is now unnecessary?

(Maybe there were other problems, but the 3ccf3e8306 is poor, and its
author is unavailable.  There's a lesson there!)
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