From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1LMqO4-0003aj-T6 for qemu-devel@nongnu.org; Tue, 13 Jan 2009 16:01:25 -0500 Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1LMqO4-0003Z5-5E for qemu-devel@nongnu.org; Tue, 13 Jan 2009 16:01:24 -0500 Received: from [199.232.76.173] (port=41023 helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1LMqO4-0003Yp-11 for qemu-devel@nongnu.org; Tue, 13 Jan 2009 16:01:24 -0500 Received: from mx2.redhat.com ([66.187.237.31]:56928) by monty-python.gnu.org with esmtp (Exim 4.60) (envelope-from ) id 1LMqO3-00063R-Ea for qemu-devel@nongnu.org; Tue, 13 Jan 2009 16:01:23 -0500 Message-ID: <496D00D9.1090601@redhat.com> Date: Tue, 13 Jan 2009 23:00:09 +0200 From: Avi Kivity MIME-Version: 1.0 Subject: Re: [Qemu-devel] [PATCH 0 of 4] Add virtio-console support to qemu References: <496CF94D.9010903@redhat.com> <200901132141.48770.borntraeger@de.ibm.com> In-Reply-To: <200901132141.48770.borntraeger@de.ibm.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Reply-To: qemu-devel@nongnu.org List-Id: qemu-devel.nongnu.org List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Christian Borntraeger Cc: ehrhardt@linux.vnet.ibm.com, aliguori@us.ibm.com, qemu-devel@nongnu.org Christian Borntraeger wrote: >> What is the advantage of virtio-console, compared to the standard serial >> port? >> > > I cannot talk about the qemu version, but looking at kuli (the experimental > kvm userspace for s390) these things come into my mind: > > - it is not limited to to serial speed settings (9600..115200 etc.) > Neither is the emulated serial port :) > - the kernel driver of virtio_console has console resizing support. Adding > resize support into qemu should be an easy addon patch, it was quite easy in > kuli. This would be really cool. Running kvm with nographic and virtio > console on stdio would allow vim or mc to get notifications about resizes of > the underlying console - like running native. > That's good to have, certainly. > - will work on platforms without a serial port (like s390) > I'm looking forward to the emulated punch card device. > Maybe we can also use this to move existing lguest guests into kvm > Won't work due to lguest's abilessness. -- Do not meddle in the internals of kernels, for they are subtle and quick to panic.