Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933615Ab0D3Rsp (ORCPT ); Fri, 30 Apr 2010 13:48:45 -0400 Received: from ksp.mff.cuni.cz ([195.113.26.206]:51481 "EHLO atrey.karlin.mff.cuni.cz" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S933601Ab0D3Rsf (ORCPT ); Fri, 30 Apr 2010 13:48:35 -0400 Date: Wed, 28 Apr 2010 07:55:39 +0200 From: Pavel Machek To: Dan Magenheimer Cc: Avi Kivity , linux-kernel@vger.kernel.org, linux-mm@kvack.org, jeremy@goop.org, hugh.dickins@tiscali.co.uk, ngupta@vflare.org, JBeulich@novell.com, chris.mason@oracle.com, kurt.hackel@oracle.com, dave.mccracken@oracle.com, npiggin@suse.de, akpm@linux-foundation.org, riel@redhat.com Subject: Re: Frontswap [PATCH 0/4] (was Transcendent Memory): overview Message-ID: <20100428055538.GA1730@ucw.cz> References: <4BD16D09.2030803@redhat.com> <4BD1A74A.2050003@redhat.com> <4830bd20-77b7-46c8-994b-8b4fa9a79d27@default> <4BD1B427.9010905@redhat.com> <4BD1B626.7020702@redhat.com> <5fa93086-b0d7-4603-bdeb-1d6bfca0cd08@default> <4BD3377E.6010303@redhat.com> <1c02a94a-a6aa-4cbb-a2e6-9d4647760e91@default4BD43033.7090706@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: 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: 945 Lines: 23 Hi! > > Seems frontswap is like a reverse balloon, where the balloon is in > > hypervisor space instead of the guest space. > > That's a reasonable analogy. Frontswap serves nicely as an > emergency safety valve when a guest has given up (too) much of > its memory via ballooning but unexpectedly has an urgent need > that can't be serviced quickly enough by the balloon driver. wtf? So lets fix the ballooning driver instead? There's no reason it could not be as fast as frontswap, right? Actually I'd expect it to be faster -- it can deal with big chunks. -- (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/