From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sasha Levin Subject: Re: [PATCH] kvm tools: Add option to specify backing storage for RAM Date: Thu, 21 Apr 2011 17:08:39 +0300 Message-ID: <1303394919.3164.1.camel@stimpy> References: <1303389930-30303-1-git-send-email-levinsasha928@gmail.com> <1303390803.3127.4.camel@stimpy> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: mingo@elte.hu, asias.hejun@gmail.com, gorcunov@gmail.com, prasadjoshi124@gmail.com, kvm@vger.kernel.org To: Pekka Enberg Return-path: Received: from mail-ww0-f44.google.com ([74.125.82.44]:40914 "EHLO mail-ww0-f44.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750981Ab1DUOIn (ORCPT ); Thu, 21 Apr 2011 10:08:43 -0400 Received: by wwa36 with SMTP id 36so2137648wwa.1 for ; Thu, 21 Apr 2011 07:08:42 -0700 (PDT) In-Reply-To: Sender: kvm-owner@vger.kernel.org List-ID: On Thu, 2011-04-21 at 16:12 +0300, Pekka Enberg wrote: > Well, I don't still quite see the point of this feature. Is there some > real world use for running guests with huge memory space that's > swap-backed? Not a single guest, but multiple guests which take more RAM than the host can provide using paging. This happened to me when I tried booting several servers to test network bridging. Can't say it's a common use-case though. -- Sasha.