From mboxrd@z Thu Jan 1 00:00:00 1970 From: Avi Kivity Subject: Re: [PATCH 5/5] ioeventfd: Introduce KVM_IOEVENTFD_FLAG_SOCKET Date: Wed, 13 Jul 2011 16:32:37 +0300 Message-ID: <4E1D9E75.1070901@redhat.com> References: <1309927078-5983-1-git-send-email-levinsasha928@gmail.com> <1309927078-5983-5-git-send-email-levinsasha928@gmail.com> <20110706114203.GA18368@redhat.com> <1309964506.15123.13.camel@sasha> <20110706155135.GA21638@redhat.com> <1310276083.2393.6.camel@sasha> <20110710080559.GC1630@redhat.com> <1310469824.2393.22.camel@sasha> <4E1C2F59.90600@redhat.com> <4E1D442E.6090308@redhat.com> <4E1D9623.70801@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: Sasha Levin , "Michael S. Tsirkin" , kvm@vger.kernel.org, Ingo Molnar , Marcelo Tosatti To: Pekka Enberg Return-path: Received: from mx1.redhat.com ([209.132.183.28]:3512 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753335Ab1GMNcv (ORCPT ); Wed, 13 Jul 2011 09:32:51 -0400 In-Reply-To: Sender: kvm-owner@vger.kernel.org List-ID: On 07/13/2011 04:00 PM, Pekka Enberg wrote: > On Wed, Jul 13, 2011 at 3:57 PM, Avi Kivity wrote: > >> We'd like to keep 8250 emulation because it's the most robust method > >> for getting data out of the kernel when there's problems. It's also > >> compatible with earlyprintk and such. > > > > What do you hope to gain from the optimization? 100ms less boot time? > > Hmm? I use serial console for logging into the guest and actually > using it all the time. Just how fast do you type? It's not enough to make something faster, it has to be slow to being with. The interface is good, but use it where it helps. -- error compiling committee.c: too many arguments to function