linux-kernel - Re: [PATCH RT 2/2] fix printk flush of messages

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Message-ID: <4FB451A6.4030306@am.sony.com>
Date:	Wed, 16 May 2012 18:17:26 -0700
From:	Frank Rowand <frank.rowand@...sony.com>
To:	"tglx@...utronix.de" <tglx@...utronix.de>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-rt-users@...r.kernel.org" <linux-rt-users@...r.kernel.org>
Subject: Re: [PATCH RT 2/2] fix printk flush of messages

The patches were tested on an ARM panda board for linux-3.4-rc5-rt6.

The panda board has a compile error in linux-3.4-rc5, which is fixed
by commit 13176a89e1c4a0011bd9f576730b0338ecb619ff in linux-3.4-rc6.

Without the patch, the printk() output from the following commands
does not appear on the console, until flushed by 'echo >/dev/console'

   echo h >/proc/sysrq-trigger
   echo p >/proc/sysrq-trigger
   echo m >/proc/sysrq-trigger

With the patch, the output flushes to the console immediately.

-Frank

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