From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754917AbbCBO4z (ORCPT ); Mon, 2 Mar 2015 09:56:55 -0500 Received: from bombadil.infradead.org ([198.137.202.9]:46259 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754369AbbCBO4w (ORCPT ); Mon, 2 Mar 2015 09:56:52 -0500 Date: Mon, 2 Mar 2015 15:56:35 +0100 From: Peter Zijlstra To: Preeti U Murthy Cc: Nicolas Pitre , tglx@linutronix.de, linux-kernel@vger.kernel.org, mingo@kernel.org, rjw@rjwysocki.net, Michael Ellerman Subject: Re: [PATCH 32/35] clockevents: Fix cpu down race for hrtimer based broadcasting Message-ID: <20150302145635.GN21418@twins.programming.kicks-ass.net> References: <20150216121435.203983131@infradead.org> <20150216122413.880378334@infradead.org> <20150221124659.GG23367@worktop.ger.corp.intel.com> <20150223161457.GA5029@twins.programming.kicks-ass.net> <54EEAFCF.4080208@linux.vnet.ibm.com> <54F02F81.10901@linux.vnet.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <54F02F81.10901@linux.vnet.ibm.com> User-Agent: Mutt/1.5.21 (2012-12-30) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Fri, Feb 27, 2015 at 02:19:05PM +0530, Preeti U Murthy wrote: > The problem reported in the changelog of this patch is causing severe > regressions very frequently on our machines for certain usecases. It would > help to put in a fix in place first and then follow that up with these > cleanups. A fix on the below lines : Regression how? Neither Thomas' Changelog, nor yours mention its a regression. If its a (recent) Regression you need to have a Fixes tag at the very least. So when was this broken and by which patch?