From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:46880) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dSijE-0001ip-2M for qemu-devel@nongnu.org; Wed, 05 Jul 2017 07:44:20 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dSij9-0007Nh-5t for qemu-devel@nongnu.org; Wed, 05 Jul 2017 07:44:20 -0400 Received: from mx1.redhat.com ([209.132.183.28]:51360) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1dSij8-0007Kb-W6 for qemu-devel@nongnu.org; Wed, 05 Jul 2017 07:44:15 -0400 Date: Wed, 5 Jul 2017 19:44:11 +0800 From: Fam Zheng Message-ID: <20170705114411.GE29382@lemon.lan> References: <1499237876.3041.4.camel@linux.intel.com> <20170705110431.GE22008@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20170705110431.GE22008@redhat.com> Subject: Re: [Qemu-devel] change x86 default machine type to Q35? List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: "Daniel P. Berrange" Cc: Chao Peng , "Tian, Kevin" , qemu-devel@nongnu.org On Wed, 07/05 12:04, Daniel P. Berrange wrote: > While you can say people should just add '-M pc' that isn't a nice > user experiance, because it makes the assumption that people actually > understand what caused their breakage. When the incompatibilities > arise the error messages are unlikely to give any hint to users that > the problems are caused by the machine type change. So unless someone > is very familiar with debugging QEMU, they're not going to realize > that '-M pc' will fix their problem. While we change the default, can we start to print a message like 'machine type ("-M" option) not specified, default to Q35. If you find compatibility issues, try "-M pc"'? Fam