From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756082AbaICJgL (ORCPT ); Wed, 3 Sep 2014 05:36:11 -0400 Received: from casper.infradead.org ([85.118.1.10]:38908 "EHLO casper.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755613AbaICJgJ (ORCPT ); Wed, 3 Sep 2014 05:36:09 -0400 Date: Wed, 3 Sep 2014 11:36:05 +0200 From: Peter Zijlstra To: Jason Wang Cc: Eliezer Tamir , "Michael S. Tsirkin" , Ingo Molnar , Mike Galbraith , davem@davemloft.net, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Ingo Molnar Subject: Re: [PATCH net-next 2/2] net: exit busy loop when another process is runnable Message-ID: <20140903093605.GD4783@worktop.ger.corp.intel.com> References: <1408683665.5648.69.camel@marge.simpson.net> <53F6F14B.1030609@redhat.com> <20140822074224.GB7372@gmail.com> <53FFEEC0.4000304@redhat.com> <540414AB.9000004@linux.intel.com> <54053998.4040604@redhat.com> <54056076.2030603@linux.intel.com> <20140902083124.GB10356@redhat.com> <5406B9E6.6050103@linux.intel.com> <5406C443.5030109@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <5406C443.5030109@redhat.com> User-Agent: Mutt/1.5.22.1 (2013-10-16) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Sep 03, 2014 at 03:33:23PM +0800, Jason Wang wrote: > A new issue is for virt users. I implement busy polling for virtio-net > but we don't want one vcpu monopoly the cpu if there's some tasks on > other vcpus. We may need some hint from host to guest to let it exit the > loop if needed. Aw god.. virt nonsense is wrecking things again.