Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932370AbaA2DG0 (ORCPT ); Tue, 28 Jan 2014 22:06:26 -0500 Received: from mail-qa0-f49.google.com ([209.85.216.49]:32857 "EHLO mail-qa0-f49.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755432AbaA2DGZ (ORCPT ); Tue, 28 Jan 2014 22:06:25 -0500 MIME-Version: 1.0 In-Reply-To: <20140127000305.GA14236@electric-eye.fr.zoreil.com> References: <1859471893.20140126115521@eikelenboom.it> <20140127000305.GA14236@electric-eye.fr.zoreil.com> Date: Tue, 28 Jan 2014 19:06:24 -0800 X-Google-Sender-Auth: PHyWZrUHc_brV-77wD8_yzx-xdg Message-ID: Subject: Re: 3.14-mw regression: rtl8169 WARNING: DMA-API: exceeded 7 overlapping mappings of pfn 55ebe From: Dan Williams To: Francois Romieu Cc: Sander Eikelenboom , "netdev@vger.kernel.org" , "linux-kernel@vger.kernel.org" , Andrew Morton , Linus Torvalds Content-Type: text/plain; charset=ISO-8859-1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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/