Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755503AbbGCOzC (ORCPT ); Fri, 3 Jul 2015 10:55:02 -0400 Received: from www.linutronix.de ([62.245.132.108]:48550 "EHLO Galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754936AbbGCOyz (ORCPT ); Fri, 3 Jul 2015 10:54:55 -0400 Date: Fri, 3 Jul 2015 16:54:49 +0200 (CEST) From: Thomas Gleixner To: Sudeep Holla cc: Wolfram Sang , Geert Uytterhoeven , Kevin Hilman , Magnus Damm , "linux-sh@vger.kernel.org" , Tyler Baker , "linux-kernel@vger.kernel.org" , Simon Horman , Borislav Petkov , "linux-arm-kernel@lists.infradead.org" Subject: Re: Possible regression due to "tick: broadcast: Prevent livelock from event handler" In-Reply-To: <5596A015.1030709@arm.com> Message-ID: References: <20150703024044.GB24695@verge.net.au> <20150703105441.GF1521@katana> <20150703133245.GA19284@katana> <20150703143703.GB19284@katana> <5596A015.1030709@arm.com> User-Agent: Alpine 2.11 (DEB 23 2013-08-11) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII X-Linutronix-Spam-Score: -1.0 X-Linutronix-Spam-Level: - X-Linutronix-Spam-Status: No , -1.0 points, 5.0 required, ALL_TRUSTED=-1,SHORTCIRCUIT=-0.0001 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 776 Lines: 23 On Fri, 3 Jul 2015, Sudeep Holla wrote: > On 03/07/15 15:37, Wolfram Sang wrote: > > > > > So this is a single core machine and uses the em_sti timer w/o the > > > broadcast nonsense. In Simons case it looks like em_sti is used as > > > broadcast device. > > > > We use the same board. Just my kernel has SMP=n. > > > > If it's UP build, then GENERIC_CLOCKEVENTS_BROADCAST is disabled. You > may be hitting the issue I reported[1] and is still under discussion. Nope. The UP version uses a non affected timer. Thanks, tglx -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/