From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754857Ab2BARrf (ORCPT ); Wed, 1 Feb 2012 12:47:35 -0500 Received: from mga01.intel.com ([192.55.52.88]:63952 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753749Ab2BARrd convert rfc822-to-8bit (ORCPT ); Wed, 1 Feb 2012 12:47:33 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.71,315,1320652800"; d="scan'208";a="112912370" From: "Rose, Gregory V" To: "Rose, Gregory V" , "'David Ahern'" CC: "'LKML'" Subject: RE: VFs go missing with latest kernel Thread-Topic: VFs go missing with latest kernel Thread-Index: AQHM4Gs6ffY5XbLoAUGa1L3askdwe5YnFpYAgACgHID//3peYIAAiyUA//98+jCAARgikA== Date: Wed, 1 Feb 2012 17:47:30 +0000 Message-ID: References: <4F287102.3060600@cisco.com> <4F2887AB.8070005@cisco.com> <4F288C4A.3070509@cisco.com> In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.22.254.140] Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 8BIT MIME-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org > -----Original Message----- > From: Rose, Gregory V > Sent: Tuesday, January 31, 2012 5:03 PM > To: David Ahern > Cc: LKML > Subject: RE: VFs go missing with latest kernel > > > -----Original Message----- > > From: David Ahern [mailto:daahern@cisco.com] > > Sent: Tuesday, January 31, 2012 4:50 PM > > To: Rose, Gregory V > > Cc: LKML > > Subject: Re: VFs go missing with latest kernel > > > > On 01/31/2012 05:43 PM, Rose, Gregory V wrote: > > >> > > >> Back to the missing VF problem: reverting the patch I mentioned > before > > >> and my VM boots up fine with the even-numbered VFs assigned to it. > > > > > > OK, thanks... I was staring at the dmesg output you sent me and it is > > odd because the even numbered VFs that go missing are there when you set > > their MAC addresses. See output below the dotted line after my reply. > > > > Ah, I think I confused you. The VFs for the first 2 ports (ie., the > > first 14 VFs) are seen fine; I only showed the VFs for the second 2 > > ports -- which are missing the even number. > > > > So, in summary I am missing 7 VFs all associated with the even numbers > > on the last ports of a quad port card. > > OK, thanks for the clarification. But it still shows that all 28 VFs > exist while their MAC addresses are being set but then at some point > subsequent to that 7 of them on the port belonging to PCI device 07:00.0 > disappear for some reason. > > I'll see what I can find. I found this in the log file you sent me. I had missed it yesterday. [ 15.835223] igb 0000:07:00.0: 7 pre-allocated VFs found - override max_vfs setting of 7 [ 15.835393] igb 0000:07:00.0: 7 VFs allocated I think that must be a bug in the code that searches for VFs already allocated and is the source of your problem. I'll keep you updated on what I find but it has to be a bug in the VF device lookups. - Greg