From mboxrd@z Thu Jan 1 00:00:00 1970 From: Pavel Machek Subject: Re: [PATCH 0/4] PM: Drop shrink_all_memory (rev. 2) (was: Re: [PATCH 3/3] PM/Hibernate: Use memory allocations to free memory) Date: Mon, 4 May 2009 11:33:10 +0200 Message-ID: <20090504093310.GC30306__35040.0987700143$1241429530$gmane$org@elf.ucw.cz> References: <200905030220.57933.rjw@sisk.pl> <20090503130818.GC9661@localhost> <200905031830.49690.rjw@sisk.pl> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Content-Disposition: inline In-Reply-To: <200905031830.49690.rjw@sisk.pl> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: linux-pm-bounces@lists.linux-foundation.org Errors-To: linux-pm-bounces@lists.linux-foundation.org To: "Rafael J. Wysocki" Cc: kernel-testers@vger.kernel.org, linux-kernel@vger.kernel.org, alan-jenkins@tuffmail.co.uk, jens.axboe@oracle.com, Andrew Morton , Wu Fengguang , torvalds@linux-foundation.org, linux-pm@lists.linux-foundation.org List-Id: linux-pm@vger.kernel.org Hi! > I know that swsusp_shrink_memory() has problems, that's why I'd like to get rid > of it. > > > I wonder if it's possible to free up the memory within 1s at all. > > I'm not sure. > > Apparently, the counting of saveable pages takes substantial time (0.5 s each > iteration on my 64-bit test box), so we can improve that by limiting the number > of iterations. We could increase step size after each step. Free in 40MB step, then 80MB step, then 160MB step, ... Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html