From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755968AbaCZRQ5 (ORCPT ); Wed, 26 Mar 2014 13:16:57 -0400 Received: from lxorguk.ukuu.org.uk ([81.2.110.251]:50611 "EHLO lxorguk.ukuu.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755921AbaCZRQz (ORCPT ); Wed, 26 Mar 2014 13:16:55 -0400 Date: Wed, 26 Mar 2014 17:16:41 +0000 From: One Thousand Gnomes To: Jan Kara Cc: Andrew Morton , LKML , pmladek@suse.cz, Frederic Weisbecker , Steven Rostedt Subject: Re: [PATCH 6/8] printk: Start printing handover kthreads on demand Message-ID: <20140326171641.0e117018@alan.etchedpixels.co.uk> In-Reply-To: <1395770101-24534-7-git-send-email-jack@suse.cz> References: <1395770101-24534-1-git-send-email-jack@suse.cz> <1395770101-24534-7-git-send-email-jack@suse.cz> Organization: Intel Corporation X-Mailer: Claws Mail 3.8.1 (GTK+ 2.24.20; 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 Tue, 25 Mar 2014 18:54:59 +0100 Jan Kara wrote: > Start kthreads for handing over printing only when printk.offload_chars > is set to value > 0 (i.e., when print offloading gets enabled). The original set it was suggested that having all these threads around that 99.99999% of users don't need was a waste and why not start them when needed. Also I asked why you couldn't just schedule_work the jobs onto CPUs instead. I don't recall seeing a reply to that - and it doesn't appear fixed here ? Alan