Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756562AbZLYTS6 (ORCPT ); Fri, 25 Dec 2009 14:18:58 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754716AbZLYTS5 (ORCPT ); Fri, 25 Dec 2009 14:18:57 -0500 Received: from atrey.karlin.mff.cuni.cz ([195.113.26.193]:53298 "EHLO atrey.karlin.mff.cuni.cz" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753203AbZLYTS4 (ORCPT ); Fri, 25 Dec 2009 14:18:56 -0500 Date: Fri, 25 Dec 2009 20:18:49 +0100 From: Pavel Machek To: Dan Magenheimer Cc: Nitin Gupta , Nick Piggin , Andrew Morton , jeremy@goop.org, xen-devel@lists.xensource.com, tmem-devel@oss.oracle.com, Rusty Russell , Rik van Riel , dave.mccracken@oracle.com, sunil.mushran@oracle.com, Avi Kivity , Schwidefsky , Balbir Singh , Marcelo Tosatti , Alan Cox , chris.mason@oracle.com, linux-mm , linux-kernel Subject: Re: Tmem [PATCH 0/5] (Take 3): Transcendent memory Message-ID: <20091225191848.GB8438@elf.ucw.cz> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Warning: Reading this can be dangerous to your mental health. User-Agent: Mutt/1.5.20 (2009-06-14) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1173 Lines: 28 On Wed 2009-12-23 09:15:27, Dan Magenheimer wrote: > > As I mentioned, I really like the idea behind tmem. All I am proposing > > is that we should probably explore some alternatives to achive this using > > some existing infrastructure in kernel. > > Hi Nitin -- > > Sorry if I sounded overly negative... too busy around the holidays. > > I'm definitely OK with exploring alternatives. I just think that > existing kernel mechanisms are very firmly rooted in the notion > that either the kernel owns the memory/cache or an asynchronous > device owns it. Tmem falls somewhere in between and is very Well... compcache seems to be very similar to preswap: in preswap case you don't know if hypervisor will have space, in ramzswap you don't know if data are compressible. Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/