From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753164Ab0JMU3M (ORCPT ); Wed, 13 Oct 2010 16:29:12 -0400 Received: from ogre.sisk.pl ([217.79.144.158]:42943 "EHLO ogre.sisk.pl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752624Ab0JMU3L (ORCPT ); Wed, 13 Oct 2010 16:29:11 -0400 From: "Rafael J. Wysocki" To: Pavel Machek Subject: Re: [PATCH 13/23] Hibernation: Partial page I/O support. Date: Wed, 13 Oct 2010 22:28:22 +0200 User-Agent: KMail/1.13.5 (Linux/2.6.36-rc7-rjw+; KDE/4.4.4; x86_64; ; ) Cc: Nigel Cunningham , Linux PM , LKML , "TuxOnIce-devel" References: <1285566238-10966-1-git-send-email-nigel@tuxonice.net> <1285566238-10966-14-git-send-email-nigel@tuxonice.net> <20101013071008.GA1610@ucw.cz> In-Reply-To: <20101013071008.GA1610@ucw.cz> MIME-Version: 1.0 Content-Type: Text/Plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Message-Id: <201010132228.22604.rjw@sisk.pl> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wednesday, October 13, 2010, Pavel Machek wrote: > Hi! > > > Add functions that can be used for coalescing and splitting buffers > > that are smaller than PAGE_SIZE. These functions provide no method > > of determining where the boundaries of the smaller buffers are to > > be found - that is the caller's problem. > > I don't get it; why do we need that support? This is related to compression. This way we can put data from two or more compressed pages into one page frame. Thanks, Rafael