Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755262Ab2HYHwk (ORCPT ); Sat, 25 Aug 2012 03:52:40 -0400 Received: from caramon.arm.linux.org.uk ([78.32.30.218]:45266 "EHLO caramon.arm.linux.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754751Ab2HYHwd (ORCPT ); Sat, 25 Aug 2012 03:52:33 -0400 Date: Sat, 25 Aug 2012 08:52:21 +0100 From: Russell King - ARM Linux To: Shawn Guo Cc: Bill Huang , "'linux-tegra@vger.kernel.org'" , "'linux-kernel@vger.kernel.org'" , "'linux-arm-kernel@lists.infradead.org'" Subject: Re: Shutdown problem in SMP system happened on Tegra20 Message-ID: <20120825075221.GH18957@n2100.arm.linux.org.uk> References: <20120824182133.GB18957@n2100.arm.linux.org.uk> <20120825073624.GI31998@S2101-09.ap.freescale.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20120825073624.GI31998@S2101-09.ap.freescale.net> User-Agent: Mutt/1.5.19 (2009-01-05) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 955 Lines: 18 On Sat, Aug 25, 2012 at 03:36:27PM +0800, Shawn Guo wrote: > On Fri, Aug 24, 2012 at 07:21:33PM +0100, Russell King - ARM Linux wrote: > > Why not just ensure that CONFIG_PM_SLEEP_SMP is enabled if your platform > > requires that the lowest CPU number be the CPU dealing with reboot? > > I have CONFIG_PM_SLEEP_SMP enabled for imx6q, but still see the imx6q > restart hook running on cpu1 than cpu0. It seems that > disable_nonboot_cpus is only called in kernel_power_off but never > kernel_restart. We should probably patch kernel_restart or > machine_restart to have disable_nonboot_cpus called? Remember that this path gets called from IRQ context which makes calling functions which sleep very dodgy. -- 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/