From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754133Ab2BASJg (ORCPT ); Wed, 1 Feb 2012 13:09:36 -0500 Received: from mga03.intel.com ([143.182.124.21]:24408 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752907Ab2BASJe convert rfc822-to-8bit (ORCPT ); Wed, 1 Feb 2012 13:09:34 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.71,315,1320652800"; d="scan'208";a="102048792" From: "Rose, Gregory V" To: 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+jCAARgikIAAigOA//96QVA= Date: Wed, 1 Feb 2012 18:02:58 +0000 Message-ID: References: <4F287102.3060600@cisco.com> <4F2887AB.8070005@cisco.com> <4F288C4A.3070509@cisco.com> <4F297D25.7090902@cisco.com> In-Reply-To: <4F297D25.7090902@cisco.com> 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: David Ahern [mailto:daahern@cisco.com] > Sent: Wednesday, February 01, 2012 9:58 AM > To: Rose, Gregory V > Cc: 'LKML' > Subject: Re: VFs go missing with latest kernel > > On 02/01/2012 10:47 AM, Rose, Gregory V wrote: > > 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. > > Confused. What is pre-allocating the VFs during boot? Looking at my > rc-scripts I am only set MAC addresses at boot. No VMs have been started > yet. This setup has worked fine with Fedora 14 and 3.0 kernels; it's > really the move to 3.3-rc that I hit the problem. Nothing is pre-allocating the VFs. That is the bug, the function I wrote to find pre-allocated VFs is messed up somehow. Since it (mistakenly) thinks it's already found pre-allocated VFs, it doesn't call pci_enable_sriov() to allocate them. - Greg