From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([208.118.235.92]:54953) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1UDJ2e-0001AA-KR for qemu-devel@nongnu.org; Wed, 06 Mar 2013 13:26:19 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1UDJ2Y-0000zp-Ms for qemu-devel@nongnu.org; Wed, 06 Mar 2013 13:26:16 -0500 Received: from mail-ie0-x230.google.com ([2607:f8b0:4001:c03::230]:52423) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1UDJ2Y-0000zK-HH for qemu-devel@nongnu.org; Wed, 06 Mar 2013 13:26:10 -0500 Received: by mail-ie0-f176.google.com with SMTP id k13so9822226iea.35 for ; Wed, 06 Mar 2013 10:26:08 -0800 (PST) Date: Tue, 05 Mar 2013 21:59:40 -0600 From: Rob Landley References: <51358208.1020409@msgid.tls.msk.ru> <20130305060742.GA31560@cs.nctu.edu.tw> In-Reply-To: (from peter.maydell@linaro.org on Tue Mar 5 00:09:27 2013) Message-Id: <1362542380.7276.9@driftwood> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8; DelSp=Yes; Format=Flowed Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Subject: Re: [Qemu-devel] default guest RAM size? List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Peter Maydell Cc: Michael Tokarev , qemu-devel , "=?UTF-8?b?6Zmz6Z+L5Lu7?= (Wei-Ren Chen)" On 03/05/2013 12:09:27 AM, Peter Maydell wrote: > On 5 March 2013 14:07, =E9=99=B3=E9=9F=8B=E4=BB=BB (Wei-Ren Chen) =20 > wrote: > > On Tue, Mar 05, 2013 at 01:40:38PM +0800, Peter Maydell wrote: > >> On 5 March 2013 13:26, Michael Tokarev wrote: > >> > For many years, qemu defaults to 128Mb of guest RAM size. > >> > Today, this is just too small, and many OSes fails to boot > >> > with this size, more, they fail to produce any reasonable > >> > messages either (eg, windows7 just crashes at startup). > >> > >> If you make the default bigger then some boards will crash > >> or behave weirdly because they try to map more RAM in than > >> will fit into the space for RAM in their address maps. > > > > So, 128Mb is still a good default? I am just wondering if those > > boards with little memory still are major user of QEMU? :) >=20 > They may not be major but they're still in the codebase. You > can't just arbitrarily break them -- you need to propose > a path forward that doesn't do that. 256 can be handled by most things. The powerpc, arm, and mips boards I =20 use in aboriginal linux all handle 256 megs. (The main reason sh4 isn't =20 a real platform is it's hardwired to 64 megs.) (Sparc32 can handle 256 megs ram but crashes if you feed it too long a =20 kernel command line.) Rob=