From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753742AbaBOTSM (ORCPT ); Sat, 15 Feb 2014 14:18:12 -0500 Received: from mail.linuxfoundation.org ([140.211.169.12]:53034 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753595AbaBOTSL (ORCPT ); Sat, 15 Feb 2014 14:18:11 -0500 Date: Sat, 15 Feb 2014 11:19:32 -0800 From: Greg Kroah-Hartman To: Pawel Moll Cc: arm@kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Arnd Bergmann Subject: Re: [PATCH 01/12] misc: vexpress-syscfg: Add udelay-based delay Message-ID: <20140215191932.GA2280@kroah.com> References: <1392138636-29240-1-git-send-email-pawel.moll@arm.com> <1392138636-29240-2-git-send-email-pawel.moll@arm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1392138636-29240-2-git-send-email-pawel.moll@arm.com> User-Agent: Mutt/1.5.22 (2013-10-16) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Feb 11, 2014 at 05:10:25PM +0000, Pawel Moll wrote: > It is normally preferable to yield the task > waiting for syscfg operations (that can take > up to dozens of milliseconds), but when the > system is shutting down it may not be possible. Really? What happens at shutdown that prevents things from being scheduled? Why would you want to busy-loop instead at this point in time? thanks, greg k-h From mboxrd@z Thu Jan 1 00:00:00 1970 From: gregkh@linuxfoundation.org (Greg Kroah-Hartman) Date: Sat, 15 Feb 2014 11:19:32 -0800 Subject: [PATCH 01/12] misc: vexpress-syscfg: Add udelay-based delay In-Reply-To: <1392138636-29240-2-git-send-email-pawel.moll@arm.com> References: <1392138636-29240-1-git-send-email-pawel.moll@arm.com> <1392138636-29240-2-git-send-email-pawel.moll@arm.com> Message-ID: <20140215191932.GA2280@kroah.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org On Tue, Feb 11, 2014 at 05:10:25PM +0000, Pawel Moll wrote: > It is normally preferable to yield the task > waiting for syscfg operations (that can take > up to dozens of milliseconds), but when the > system is shutting down it may not be possible. Really? What happens at shutdown that prevents things from being scheduled? Why would you want to busy-loop instead at this point in time? thanks, greg k-h