From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:54164) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1b85nc-0000zC-Fl for qemu-devel@nongnu.org; Wed, 01 Jun 2016 09:03:05 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1b85nX-00083G-GN for qemu-devel@nongnu.org; Wed, 01 Jun 2016 09:03:04 -0400 Received: from mx1.redhat.com ([209.132.183.28]:35628) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1b85nX-000839-Ab for qemu-devel@nongnu.org; Wed, 01 Jun 2016 09:02:59 -0400 References: <1464784092-28298-1-git-send-email-kraxel@redhat.com> From: Paolo Bonzini Message-ID: <7e45a573-a884-ceb5-7d7f-e26dc0f9fa3c@redhat.com> Date: Wed, 1 Jun 2016 15:02:56 +0200 MIME-Version: 1.0 In-Reply-To: <1464784092-28298-1-git-send-email-kraxel@redhat.com> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] [RESEND PATCH] pc: allow raising low memory via max-ram-below-4g option List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Gerd Hoffmann , qemu-devel@nongnu.org Cc: "Michael S. Tsirkin" , Richard Henderson , Eduardo Habkost On 01/06/2016 14:28, Gerd Hoffmann wrote: > This patch extends the functionality of the max-ram-below-4g option > to also allow increasing lowmem. Use case: Give as much memory as > possible to legacy non-PAE guests. > > While being at it also rework the lowmem calculation logic and add a > longish comment describing how it works and what the compatibility > constrains are. Does this break migration if you use something like "-M max-ram-below-4g=4g -m 3968m"? I don't have big problems with that, but it has to be documented. Thanks, Paolo