From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:35465) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1alxE2-0005yU-Ni for qemu-devel@nongnu.org; Fri, 01 Apr 2016 07:26:51 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1alxDx-0003us-PP for qemu-devel@nongnu.org; Fri, 01 Apr 2016 07:26:50 -0400 Received: from mx1.redhat.com ([209.132.183.28]:36581) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1alxDx-0003uh-K6 for qemu-devel@nongnu.org; Fri, 01 Apr 2016 07:26:45 -0400 Date: Fri, 1 Apr 2016 12:26:43 +0100 From: "Richard W.M. Jones" Message-ID: <20160401112642.GL32728@redhat.com> References: <56FE2D42.5020607@redhat.com> <20160401081417.GD32728@redhat.com> <56FE3045.2030003@redhat.com> <20160401084456.GF32728@redhat.com> <1459502310.7011.37.camel@redhat.com> <20160401101733.GI32728@redhat.com> <1459508875.7011.62.camel@redhat.com> <20160401111139.GK32728@redhat.com> <20160401112027.GD19398@redhat.com> <56FE59C2.8030400@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <56FE59C2.8030400@redhat.com> Subject: Re: [Qemu-devel] Why is SeaBIOS used with -kernel? List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Paolo Bonzini Cc: marc.mari.barcelo@gmail.com, Stefan Hajnoczi , Kevin O'Connor , Gerd Hoffmann , qemu-devel@nongnu.org On Fri, Apr 01, 2016 at 01:21:38PM +0200, Paolo Bonzini wrote: > > > On 01/04/2016 13:20, Richard W.M. Jones wrote: > > +# MPTABLE is required by Linux kernel, the others add only a > > +# couple of milliseconds so we might as well have them > > +CONFIG_PIRTABLE=y > > +CONFIG_MPTABLE=y > > +CONFIG_SMBIOS=y > > +CONFIG_ACPI=y > > + > > MPTABLE is only required is you don't have ACPI. True .. however for speed reasons libguestfs uses acpi=off. It saves us about 190 ms. So we need MPTABLE. Rich. -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones Read my programming and virtualization blog: http://rwmj.wordpress.com virt-top is 'top' for virtual machines. Tiny program with many powerful monitoring features, net stats, disk stats, logging, etc. http://people.redhat.com/~rjones/virt-top