From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Yang, Sheng" Subject: Re: Test with VT-d patches Date: Wed, 3 Sep 2008 08:57:20 +0800 Message-ID: <200809030857.20904.sheng.yang@intel.com> References: <4026910.240961220380805962.JavaMail.servlet@kundenserver> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Cc: kronos.it@gmail.com, weidong.han@intel.com, kvm@vger.kernel.org To: gg@seh.de Return-path: Received: from mga02.intel.com ([134.134.136.20]:54077 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754619AbYICAy2 (ORCPT ); Tue, 2 Sep 2008 20:54:28 -0400 In-Reply-To: <4026910.240961220380805962.JavaMail.servlet@kundenserver> Content-Disposition: inline Sender: kvm-owner@vger.kernel.org List-ID: On Wednesday 03 September 2008 02:40:06 gg@seh.de wrote: > Hi, > > >On Tue, Sep 2, 2008 at 4:17 PM, wrote: > >> Hi, > >> > >> here comes a small part of the dmesg output. Qemu/KVM produces now a CPU > > > >usage > > > >> of about 90%. > >> > >> > >> Sep 2 11:27:35 ubuntu klogd: [ 335.057707] ------------[ cut here > > > >]------------ > > > >> Sep 2 11:27:35 ubuntu klogd: [ 335.057711] WARNING: at > > > >kernel/irq/manage.c:180 __enable_irq+0x34/0x80() > > > >> Sep 2 11:27:35 ubuntu klogd: [ 335.057713] Unbalanced enable for IRQ > >> 21 > > > >[...] > > > >> This messages comes endless. > >> Something with IRQs? > > > >Hum, seems that interrupt has already been enabled... did you load the > >driver for the NIC in the host? With pass-through the device is > >"owned" by the guest. > > No. > The driver was not loaded. > It is not possible to start qemu with a pci-device used by the host. > (I try this with the second network device.) > > Can this interrupt be shared with an other IRQ? Oh, no, not currently... The device's IRQ should not be shared with other, we haven't implement shared IRQ logic, but soon. -- regards Yang, Sheng > > Gregor