From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Rafael J. Wysocki" Subject: Re: slow susped to disk Date: Mon, 3 Apr 2006 11:50:49 +0200 Message-ID: <200604031150.49781.rjw@sisk.pl> References: <4430E44B.7070003@triumf.ca> <200604031128.02974.rjw@sisk.pl> <20060403094716.GC12475@elf.ucw.cz> Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Return-path: Received: from ogre.sisk.pl ([217.79.144.158]:37611 "EHLO ogre.sisk.pl") by vger.kernel.org with ESMTP id S1751710AbWDCJwD (ORCPT ); Mon, 3 Apr 2006 05:52:03 -0400 In-Reply-To: <20060403094716.GC12475@elf.ucw.cz> Content-Disposition: inline Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org To: Pavel Machek Cc: Zaher Salman , linux-acpi@vger.kernel.org Hi, On Monday 03 April 2006 11:47, Pavel Machek wrote: > > > I upgraded the kernel from 2.6.15 to 2.6.16 on my presario 2100. Both > > > kernels were compiled with the similar configuration files. Anyway I > > > found that suspend to disk (and resume) is much slower on 2.6.16 > > > compared to 2.6.15. Any idea for why that might happen or how can I > > > speed it up? There is also a big difference when suspending with the > > > laptop plugged or not.. > > > > This is because the size of the suspend image is now greater than > > for 2.6.15. > > > > There's the /sys/power/image_size knob that controls the size of the image. > > If you set it to 0 (eg. by echo 0 > /sys/power/image_size as root), the > > 2.6.15 behavior should be restored. However, if you set image_size > 0 > > it should improve the system responsiveness after resume. > > > > Please refer to Documentation/power/interface.txt in the kernel tree for > > details. > > If you don't mind, I have added it to the FAQ. ACK Rafael