From mboxrd@z Thu Jan  1 00:00:00 1970
From: Oscar Fernando Garcia <oscar@softlab.cs.tsukuba.ac.jp>
Subject: non-root mode and preemption
Date: Mon, 13 Jun 2016 19:06:36 +0900
Message-ID: <575E85AC.4080604@softlab.cs.tsukuba.ac.jp>
Mime-Version: 1.0
Content-Type: text/plain; charset=utf-8; format=flowed
Content-Transfer-Encoding: 7bit
To: kvm@vger.kernel.org
Return-path: <kvm-owner@vger.kernel.org>
Received: from voyager.hlla.is.tsukuba.ac.jp ([130.158.83.133]:65382 "EHLO
	softlab.cs.tsukuba.ac.jp" rhost-flags-OK-OK-OK-OK) by vger.kernel.org
	with ESMTP id S964862AbcFMKPc (ORCPT <rfc822;kvm@vger.kernel.org>);
	Mon, 13 Jun 2016 06:15:32 -0400
Received: from [192.168.96.116] (unknown [192.168.96.116])
	by softlab.cs.tsukuba.ac.jp (Postfix) with ESMTPSA id 4C796145337D
	for <kvm@vger.kernel.org>; Mon, 13 Jun 2016 19:07:04 +0900 (JST)
Sender: kvm-owner@vger.kernel.org
List-ID: <kvm.vger.kernel.org>

Good Morning,

I have a simple question. In KVM code: /arch/x86/kvm/x86.c when the 
function vcpu_enter_guest is called, the run function ( 
kvm_x86_ops->run(vcpu)) is called with preemption and irqs disabled.
My question is, running in non-root mode with preemption and irqs 
disabled affects the latency of other processes or VPCUs running in the 
same CPU?


Thank you

Oscar