From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1030477AbXCFJlU (ORCPT ); Tue, 6 Mar 2007 04:41:20 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1030489AbXCFJlU (ORCPT ); Tue, 6 Mar 2007 04:41:20 -0500 Received: from gprs189-60.eurotel.cz ([160.218.189.60]:36304 "EHLO amd.ucw.cz" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1030477AbXCFJlT (ORCPT ); Tue, 6 Mar 2007 04:41:19 -0500 Date: Tue, 6 Mar 2007 10:41:07 +0100 From: Pavel Machek To: "Rafael J. Wysocki" Cc: Andrew Morton , LKML Subject: Re: [PATCH] Kconfig: Update swsusp description Message-ID: <20070306094107.GF2040@elf.ucw.cz> References: <200703041514.44680.rjw@sisk.pl> <20070306083224.GE2040@elf.ucw.cz> <200703061013.13585.rjw@sisk.pl> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <200703061013.13585.rjw@sisk.pl> X-Warning: Reading this can be dangerous to your mental health. User-Agent: Mutt/1.5.11+cvs20060126 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Hi! > > > Index: linux-2.6.21-rc2/kernel/power/Kconfig > > > =================================================================== > > > --- linux-2.6.21-rc2.orig/kernel/power/Kconfig 2007-02-28 23:54:45.000000000 +0100 > > > +++ linux-2.6.21-rc2/kernel/power/Kconfig 2007-03-04 11:50:48.000000000 +0100 > > > @@ -81,30 +81,35 @@ config SOFTWARE_SUSPEND > > > bool "Software Suspend" > > > depends on PM && SWAP && ((X86 && (!SMP || SUSPEND_SMP)) || ((FRV || PPC32) && !SMP)) > > > ---help--- > > > + Enable the suspend to disk (STD) functionality. > > > > > > + You can suspend your machine with 'echo disk > /sys/power/state'. > > > + Alternatively, you can use the additional userland tools available > > > + from . > > > + > > > + In principle it does not require ACPI or APM, although for example > > > + ACPI will be used if available. > > > + > > > + It creates an image which is saved in your active swap. Upon the next > > > boot, pass the 'resume=/dev/swappartition' argument to the kernel to > > > > Actually, these days resume=... on kernel command line needs to be > > there for suspend, too, IIRC. > > I didn't change this line, so? So I should go and fix it ;-). (I'm now overloaded with email sorry for being terse.) Can we do something like + Enable the suspend to disk (STD) functionality. + In principle it does not require any support from BIOS, although + ACPI will be used if available. + You can suspend your machine with 'echo disk > + /sys/power/state' after placing resume=/dev/swappartition on + kernel command line. + Alternatively, you can use the additional userland tools available + from . (and remove ...upon next boot... section). > > > + Right now you may boot without resuming and resume later but in the > > > + meantime you cannot use the swap partition(s)/file(s) involved in > > > + suspending. Also in this case you must not use the > > > > I'd prefer not to encourage this use. It has too many traps ready for > > people. > > But IMHO there should be a warning that if you boot without resuming, make sure > you'll not resume after the next reboot or bad things will happen. + It is possible to boot without resuming and resume later but + if you access any partitions/files used by suspended kernel, + you'll probably loose your data. See ... for details. ? Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html