Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756175AbaBFLgl (ORCPT ); Thu, 6 Feb 2014 06:36:41 -0500 Received: from vserver.eikelenboom.it ([84.200.39.61]:32820 "EHLO smtp.eikelenboom.it" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755949AbaBFLgj (ORCPT ); Thu, 6 Feb 2014 06:36:39 -0500 Date: Thu, 6 Feb 2014 12:36:31 +0100 From: Sander Eikelenboom Organization: Eikelenboom IT services X-Priority: 3 (Normal) Message-ID: <84816226.20140206123631@eikelenboom.it> To: Dan Williams CC: Francois Romieu , "netdev@vger.kernel.org" , "linux-kernel@vger.kernel.org" Subject: Re: 3.14-mw regression: rtl8169 WARNING: DMA-API: exceeded 7 overlapping mappings of pfn 55ebe In-Reply-To: References: <1859471893.20140126115521@eikelenboom.it> <20140127000305.GA14236@electric-eye.fr.zoreil.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Dan / Francois, Didn't have time to test it before, but the patch doesn't seem to help. I'm still getting the "DMA-API: exceeded 7 overlapping mappings of pfn 55ebe", but i see now i forgot to mention i use r8169.use_dac=1 ... Not using it seems to prevent the warning, but before 3.14 i have never seen this (with r8169.use_dac=1) -- Sander Wednesday, January 29, 2014, 4:06:24 AM, you wrote: > On Sun, Jan 26, 2014 at 4:03 PM, Francois Romieu wrote: >> Sander Eikelenboom : >> [...] >>> I have got a regression with a 3.14-mw kernel (last commit is 4ba9920e5e9c0e16b5ed24292d45322907bb9035): >>> It looks like it's related to the rtl8169 ... >>> >>> -- >>> Sander >>> >>> Jan 26 11:36:26 serveerstertje kernel: [ 89.105537] ------------[ cut here ]------------ >>> Jan 26 11:36:26 serveerstertje kernel: [ 89.116779] WARNING: CPU: 0 PID: 0 at lib/dma-debug.c:491 add_dma_entry+0x103/0x130() >>> Jan 26 11:36:26 serveerstertje kernel: [ 89.128148] DMA-API: exceeded 7 overlapping mappings of pfn 55ebe >>> Jan 26 11:36:26 serveerstertje kernel: [ 89.139397] Modules linked in: >>> Jan 26 11:36:26 serveerstertje kernel: [ 89.150535] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 3.13.0-20140125-mw-pcireset+ #1 >>> Jan 26 11:36:26 serveerstertje kernel: [ 89.161784] Hardware name: MSI MS-7640/890FXA-GD70 (MS-7640) , BIOS V1.8B1 09/13/2010 >>> Jan 26 11:36:26 serveerstertje kernel: [ 89.172965] 0000000000000009 ffff88005f603838 ffffffff81acbcfa ffffffff822134e0 >>> Jan 26 11:36:26 serveerstertje kernel: [ 89.184156] ffff88005f603888 ffff88005f603878 ffffffff810bdf62 ffff880000000000 >>> Jan 26 11:36:26 serveerstertje kernel: [ 89.195186] 0000000000055ebe 00000000ffffffef 0000000000000200 ffff8800592ea098 >>> Jan 26 11:36:26 serveerstertje kernel: [ 89.206227] Call Trace: >>> Jan 26 11:36:26 serveerstertje kernel: [ 89.217027] [] dump_stack+0x46/0x58 >>> Jan 26 11:36:26 serveerstertje kernel: [ 89.227907] [] warn_slowpath_common+0x82/0xb0 >>> Jan 26 11:36:26 serveerstertje kernel: [ 89.238678] [] warn_slowpath_fmt+0x41/0x50 >>> Jan 26 11:36:26 serveerstertje kernel: [ 89.249336] [] ? active_pfn_read_overlap+0x3a/0x70 >>> Jan 26 11:36:26 serveerstertje kernel: [ 89.259904] [] add_dma_entry+0x103/0x130 >>> Jan 26 11:36:26 serveerstertje kernel: [ 89.270416] [] debug_dma_map_page+0x126/0x150 >>> Jan 26 11:36:26 serveerstertje kernel: [ 89.280840] [] rtl8169_start_xmit+0x216/0xa20 >> [r8169 and xen stuff] >> >> Dan, I miss the part of the debug code that tells where the mappings were >> previously set. > In this case it was a facepalm mistake on my part. The mappings were > not being properly accounted in the last revision of the patch I sent. > I copied you on the fix [1]. > -- > Dan > [1]: http://marc.info/?l=linux-netdev&m=139096447627032&w=2 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/