From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:46948) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YnO1B-0006QY-MP for qemu-devel@nongnu.org; Wed, 29 Apr 2015 05:10:58 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1YnO1A-0008Dz-FU for qemu-devel@nongnu.org; Wed, 29 Apr 2015 05:10:57 -0400 Message-ID: <5540A00D.4080500@redhat.com> Date: Wed, 29 Apr 2015 11:10:37 +0200 From: Paolo Bonzini MIME-Version: 1.0 References: <1430204006-10160-1-git-send-email-nikunj@linux.vnet.ibm.com> <1430204006-10160-2-git-send-email-nikunj@linux.vnet.ibm.com> <20150428133029.3494542e@thh440s> <20150429015638.GC32589@voom.redhat.com> <87sibjxsfo.fsf@abhimanyu.in.ibm.com> <5540975F.3090804@redhat.com> <87pp6nxq0x.fsf@abhimanyu.in.ibm.com> In-Reply-To: <87pp6nxq0x.fsf@abhimanyu.in.ibm.com> Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] [REBASE PATCH v5 1/2] machine: add default_ram_size to machine class List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Nikunj A Dadhania , David Gibson Cc: thuth@redhat.com, aik@ozlabs.ru, armbru@redhat.com, agraf@suse.de, qemu-devel@nongnu.org, qemu-ppc@nongnu.org, marcel.apfelbaum@gmail.com, imammedo@redhat.com On 29/04/2015 11:06, Nikunj A Dadhania wrote: > > so David can push both patches. > > > > But isn't 1G a bit too much? At least on x86 you can easily boot with 512M. > > I understood this number as not the _minimum memory_ to boot the > VM. And this will only come in picture when the user has not specified > any memory. This in turn will basically only happen for QEMU developers. So keeping the default on the low side would make sense. On my (4G memory) laptop I might not even be able to boot a PPC64 VM with 1G and TCG, but I can do that nicely with 256M. Paolo > I have seen the PPC64 VM booting with 256M.