From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932240AbVHNUPA (ORCPT ); Sun, 14 Aug 2005 16:15:00 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932241AbVHNUO7 (ORCPT ); Sun, 14 Aug 2005 16:14:59 -0400 Received: from atrey.karlin.mff.cuni.cz ([195.113.31.123]:46804 "EHLO atrey.karlin.mff.cuni.cz") by vger.kernel.org with ESMTP id S932240AbVHNUO7 (ORCPT ); Sun, 14 Aug 2005 16:14:59 -0400 Date: Sun, 14 Aug 2005 21:47:56 +0200 From: Pavel Machek To: Con Kolivas Cc: Jim MacBaine , linux-kernel@vger.kernel.org, ck@vds.kolivas.org, tony@atomide.com, tuukka.tikkanen@elektrobit.com Subject: Re: [PATCH] i386 No-Idle-Hz aka Dynamic-Ticks 3 Message-ID: <20050814194756.GC1686@openzaurus.ucw.cz> References: <200508031559.24704.kernel@kolivas.org> <200508040716.24346.kernel@kolivas.org> <3afbacad050803152226016790@mail.gmail.com> <200508040852.10224.kernel@kolivas.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <200508040852.10224.kernel@kolivas.org> User-Agent: Mutt/1.3.27i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Hi! > > > What happens when you disable it at runtime before suspending? > > > > > > echo 0 > /sys/devices/system/dyn_tick/dyn_tick0/enable > > > > This has no effect. The system stalls at exactly the same point. The > > last lines on my screen are: > > Ok perhaps on the resume side instead. When trying to resume can you try > booting with 'dyntick=disable'. Note this isn't meant to be a long term fix > but once we figure out where the problem is we should be able to code around > it. Can you reproduce it using plain swsusp? We probably need more carefull suspend/resume support on timer with dyntick enabled. With vanilla, timer just ticks on constant rate; no state to save. With dyntick, however... Pavel -- 64 bytes from 195.113.31.123: icmp_seq=28 ttl=51 time=448769.1 ms