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: Thu, 14 Jul 2011 11:09:57 +0300 Message-ID: <4E1EA455.4010608@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> <4E1D9E75.1070901@redhat.com> <4E1E9A3B.7090200@kernel.org> 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]:6062 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753507Ab1GNIKO (ORCPT ); Thu, 14 Jul 2011 04:10:14 -0400 In-Reply-To: <4E1E9A3B.7090200@kernel.org> Sender: kvm-owner@vger.kernel.org List-ID: On 07/14/2011 10:26 AM, Pekka Enberg wrote: > > On 7/13/11 4:32 PM, Avi Kivity wrote: >> 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. > > I don't know why you bring up serial console input here. Sasha's > original KVM_IOEVENTFD_FLAG_PIPE patch clearly stated: > > A simple example for practical use is the serial port. we are not > interested in an exit every time a char is written to the port, but > we do need to know what was written so we could handle it on the > guest. > > So it's talking about the serial console output, not input. > I'm talking about the real world. Is any of this something that needs optimization? 1024 vcpus logging in via the serial console at 10Gbps. Get real. -- error compiling committee.c: too many arguments to function