Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756314AbaBFNJZ (ORCPT ); Thu, 6 Feb 2014 08:09:25 -0500 Received: from vserver.eikelenboom.it ([84.200.39.61]:33477 "EHLO smtp.eikelenboom.it" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756197AbaBFNJW (ORCPT ); Thu, 6 Feb 2014 08:09:22 -0500 Date: Thu, 6 Feb 2014 14:09:09 +0100 From: Sander Eikelenboom Organization: Eikelenboom IT services X-Priority: 3 (Normal) Message-ID: <942972114.20140206140909@eikelenboom.it> To: Sander Eikelenboom , Konrad Rzeszutek Wilk , Wei Liu CC: Dan Williams , 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: <84816226.20140206123631@eikelenboom.it> References: <1859471893.20140126115521@eikelenboom.it> <20140127000305.GA14236@electric-eye.fr.zoreil.com> <84816226.20140206123631@eikelenboom.it> 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 Hmm ok that last message was false .. sorry for that .. it did happen again without r8169.use_dac=1, it just doesn't seem to happen all the time... Konrad / Wei, do you happen to know of any xen related change that went into 3.14 merge window that relates to dma / xen networking ? -- Sander complete stacktrace: [ 342.710738] ------------[ cut here ]------------ [ 342.726890] WARNING: CPU: 0 PID: 0 at lib/dma-debug.c:491 add_dma_entry+0x105/0x130() [ 342.743210] DMA-API: exceeded 7 overlapping mappings of pfn 40b00 [ 342.759510] Modules linked in: [ 342.775557] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 3.14.0-rc1-20140206-pcireset-net-btrevert+ #1 [ 342.791706] Hardware name: MSI MS-7640/890FXA-GD70 (MS-7640) , BIOS V1.8B1 09/13/2010 [ 342.807627] 0000000000000009 ffff88005f603828 ffffffff81ad29fc ffffffff822134e0 [ 342.823430] ffff88005f603878 ffff88005f603868 ffffffff810bdf62 ffff880000000000 [ 342.839081] 0000000000040b00 00000000ffffffef ffffffff822102e0 ffff8800592b9098 [ 342.854572] Call Trace: [ 342.869748] [] dump_stack+0x46/0x58 [ 342.884915] [] warn_slowpath_common+0x82/0xb0 [ 342.899710] [] warn_slowpath_fmt+0x41/0x50 [ 342.914395] [] ? active_pfn_read_overlap+0x3a/0x70 [ 342.929166] [] add_dma_entry+0x105/0x130 [ 342.943733] [] debug_dma_map_page+0x126/0x150 [ 342.957988] [] rtl8169_start_xmit+0x216/0xa20 [ 342.972306] [] ? dev_queue_xmit_nit+0x1ef/0x260 [ 342.986523] [] ? dev_loopback_xmit+0x1e0/0x1e0 [ 343.000689] [] dev_hard_start_xmit+0x2e6/0x4a0 [ 343.014466] [] sch_direct_xmit+0xfe/0x280 [ 343.028052] [] __dev_queue_xmit+0x23c/0x630 [ 343.041338] [] ? dev_hard_start_xmit+0x4a0/0x4a0 [ 343.054483] [] ? ip_output+0x54/0xf0 [ 343.067659] [] dev_queue_xmit+0xb/0x10 [ 343.080804] [] ip_finish_output+0x2cb/0x670 [ 343.093746] [] ? ip_output+0x54/0xf0 [ 343.106391] [] ip_output+0x54/0xf0 [ 343.118683] [] ip_forward_finish+0x71/0x1a0 [ 343.130901] [] ip_forward+0x1a3/0x440 [ 343.142829] [] ? lock_is_held+0x8b/0xb0 [ 343.154346] [] ip_rcv_finish+0x150/0x660 [ 343.165748] [] ip_rcv+0x22b/0x370 [ 343.176838] [] ? packet_rcv_spkt+0x42/0x190 [ 343.187659] [] __netif_receive_skb_core+0x6d2/0x8a0 [ 343.198209] [] ? __netif_receive_skb_core+0x114/0x8a0 [ 343.208819] [] ? xen_clocksource_read+0x20/0x30 [ 343.219471] [] ? getnstimeofday+0x9/0x30 [ 343.229862] [] __netif_receive_skb+0x1c/0x70 [ 343.239953] [] netif_receive_skb_internal+0x1e/0xf0 [ 343.249908] [] napi_gro_receive+0x70/0xa0 [ 343.259509] [] rtl8169_poll+0x2d3/0x680 [ 343.268982] [] ? _raw_spin_unlock_irq+0x2b/0x50 [ 343.278091] [] net_rx_action+0x161/0x260 [ 343.287056] [] __do_softirq+0x12c/0x280 [ 343.295756] [] irq_exit+0xa2/0xd0 [ 343.304235] [] xen_evtchn_do_upcall+0x2f/0x40 [ 343.312387] [] xen_do_hypervisor_callback+0x1e/0x30 [ 343.320389] [] ? xen_hypercall_sched_op+0xa/0x20 [ 343.328171] [] ? xen_hypercall_sched_op+0xa/0x20 [ 343.335738] [] ? xen_safe_halt+0x10/0x20 [ 343.343142] [] ? default_idle+0x18/0x20 [ 343.350202] [] ? arch_cpu_idle+0x2e/0x40 [ 343.356994] [] ? cpu_startup_entry+0x91/0x1e0 [ 343.363658] [] ? rest_init+0xb7/0xc0 [ 343.369924] [] ? csum_partial_copy_generic+0x170/0x170 [ 343.376057] [] ? start_kernel+0x409/0x416 [ 343.381972] [] ? repair_env_string+0x5e/0x5e [ 343.387573] [] ? x86_64_start_reservations+0x2a/0x2c [ 343.393152] [] ? xen_start_kernel+0x586/0x588 [ 343.398628] ---[ end trace 8379b598fb7ef5ee ]--- Thursday, February 6, 2014, 12:36:31 PM, you wrote: > 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 -- Best regards, Sander mailto:linux@eikelenboom.it -- 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/