From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754077AbaDRSyo (ORCPT ); Fri, 18 Apr 2014 14:54:44 -0400 Received: from mail.linuxfoundation.org ([140.211.169.12]:41795 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751197AbaDRSyk (ORCPT ); Fri, 18 Apr 2014 14:54:40 -0400 Date: Fri, 18 Apr 2014 11:54:38 -0700 From: Andrew Morton To: Jan Kara Cc: One Thousand Gnomes , LKML , pmladek@suse.cz, Frederic Weisbecker , Steven Rostedt Subject: Re: [PATCH 8/8] printk: Add config option for disabling printk offloading Message-Id: <20140418115438.1e65e07af17e3ba6d7c554db@linux-foundation.org> In-Reply-To: <20140326192815.GC18118@quack.suse.cz> References: <1395770101-24534-1-git-send-email-jack@suse.cz> <1395770101-24534-9-git-send-email-jack@suse.cz> <20140326172332.5f1e1bfb@alan.etchedpixels.co.uk> <20140326192815.GC18118@quack.suse.cz> X-Mailer: Sylpheed 3.2.0beta5 (GTK+ 2.24.10; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 26 Mar 2014 20:28:15 +0100 Jan Kara wrote: > > All the afflicted consoles are serial, all go via the uart layer as far > > as I can see. > > > > The uart layer has a queue mechanism that could be used > I'm sorry, I don't follow here - what can the uart queueing be used for? Alan, I'm desperate to avoid adding all this complexity to core printk code to solve such a rare problem. It'd be great if you could flesh out any alternative ideas please.