From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from bombadil.infradead.org ([65.50.211.133]:51979 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751305AbdBOJNf (ORCPT ); Wed, 15 Feb 2017 04:13:35 -0500 Date: Wed, 15 Feb 2017 10:13:29 +0100 From: Peter Zijlstra To: Nikolay Borisov Cc: stable@vger.kernel.org, rabinv@axis.com, Ingo Molnar Subject: Re: Request for inclusion of fb90a6e93c0684 ("sched/debug: Don't dump sched debug info in SysRq-W") Message-ID: <20170215091329.GN3093@worktop> References: <0d90e505-aef8-4eea-1740-6ece6bfea9ea@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <0d90e505-aef8-4eea-1740-6ece6bfea9ea@gmail.com> Sender: stable-owner@vger.kernel.org List-ID: On Wed, Feb 15, 2017 at 11:09:14AM +0200, Nikolay Borisov wrote: > Hello, > > I'd like to ask for the patch in the subject to be included in stable > kernels. Without it if one wants to see only the blocked stats this > becomes impossible since the information dumped by sched_debug is so > much that it overflows the kmsg buffer and information about blocked > stats is overwritten. This is especially a problem in distro kernels > which are based on 4.4 and have enabled CONFIG_SCHED_DEBUG - e.g. ubuntu. Who cares about the kmsg buffer? Also, just make it bigger or disable SCHED_DEBUG, as the name implies it _is_ a debug feature after all.