From mboxrd@z Thu Jan 1 00:00:00 1970 From: Frank Rowand Subject: Re: [PATCH RT 2/2] fix printk flush of messages Date: Wed, 16 May 2012 18:17:26 -0700 Message-ID: <4FB451A6.4030306@am.sony.com> References: <4FB44EF1.9050809@am.sony.com> <4FB44FD0.4090800@am.sony.com> Reply-To: Mime-Version: 1.0 Content-Type: text/plain; charset="ISO-8859-1" Content-Transfer-Encoding: 7bit To: "tglx@linutronix.de" , "linux-kernel@vger.kernel.org" , "linux-rt-users@vger.kernel.org" Return-path: Received: from tx2ehsobe002.messaging.microsoft.com ([65.55.88.12]:20880 "EHLO tx2outboundpool.messaging.microsoft.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752442Ab2EQBRs (ORCPT ); Wed, 16 May 2012 21:17:48 -0400 In-Reply-To: <4FB44FD0.4090800@am.sony.com> Sender: linux-rt-users-owner@vger.kernel.org List-ID: 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