Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752124AbcKQWDM (ORCPT ); Thu, 17 Nov 2016 17:03:12 -0500 Received: from smtp89.ord1c.emailsrvr.com ([108.166.43.89]:33784 "EHLO smtp89.ord1c.emailsrvr.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750714AbcKQWDI (ORCPT ); Thu, 17 Nov 2016 17:03:08 -0500 X-Greylist: delayed 581 seconds by postgrey-1.27 at vger.kernel.org; Thu, 17 Nov 2016 17:03:07 EST X-SMTPDoctor-Processed: csmtpprox beta X-Auth-ID: markh@compro.net X-Sender-Id: markh@compro.net Reply-To: markh@compro.net Subject: Re: BUG at drivers/iommu/amd_iommu.c:1436! References: <838275de-6cac-93d8-ca04-54b06a24b3d4@compro.net> <20161117214141.GC2078@8bytes.org> To: Joerg Roedel Cc: iommu@lists.linux-foundation.org, Linux-kernel From: Mark Hounschell Organization: Compro Computer Svcs. Message-ID: Date: Thu, 17 Nov 2016 16:53:24 -0500 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.4.0 MIME-Version: 1.0 In-Reply-To: <20161117214141.GC2078@8bytes.org> Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 505 Lines: 16 On 11/17/2016 04:41 PM, Joerg Roedel wrote: > Hi Mark, > > On Thu, Nov 17, 2016 at 02:13:59PM -0500, Mark Hounschell wrote: >> Kernel version is 4.8.0. No failure when the IOMMU is disabled. This >> is an out of tree GPL driver using >> pci_alloc_consistent/pci_free_consistent. The free causes this. > > Can you please run the driver with dma-api debugging enabled? Does it > trigger any warnings? > It's been a while since I've done that for ya. Kernel config options? Kernel cmd line you want? Mark