From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933474AbXBEV26 (ORCPT ); Mon, 5 Feb 2007 16:28:58 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S933476AbXBEV26 (ORCPT ); Mon, 5 Feb 2007 16:28:58 -0500 Received: from nigel.suspend2.net ([203.171.70.205]:49088 "EHLO nigel.suspend2.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933474AbXBEV2x (ORCPT ); Mon, 5 Feb 2007 16:28:53 -0500 Subject: Re: [patch 1/1] PM: Adds remount fs ro at suspend From: Nigel Cunningham Reply-To: nigel@nigel.suspend2.net To: Henrique de Moraes Holschuh Cc: Andrew Morton , akuster@mvista.com, linux-kernel@vger.kernel.org, Pavel Machek , "Rafael J. Wysocki" In-Reply-To: <20070203003536.GA619@khazad-dum.debian.net> References: <20070202235132.EDBDF1C448@hermes.mvista.com> <20070202161611.cf8b4328.akpm@linux-foundation.org> <20070203003536.GA619@khazad-dum.debian.net> Content-Type: text/plain Date: Tue, 06 Feb 2007 08:28:33 +1100 Message-Id: <1170710913.6105.39.camel@nigel.suspend2.net> Mime-Version: 1.0 X-Mailer: Evolution 2.8.1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Hi. On Fri, 2007-02-02 at 22:35 -0200, Henrique de Moraes Holschuh wrote: > On Fri, 02 Feb 2007, Andrew Morton wrote: > > Well the code appears simple enough, but I've not previously heard anyone > > express a need for this feature. But I know how to cc people who might > > have heard this. > > You are, now. > > We usually try to do it in userspace (and it gets ugly when we fail). If > the kernel would do it, it would be very welcome. Why do you think remounting filesystems is necessary? Are you getting problems with some particular filesystem? If I recall correctly, we briefly tried remounting filesystems in Suspend2, but it created problems with logging - some files open r/w were readonly afterwards. We then tried bdev freezing with much better success. Regards, Nigel