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Message-ID: <84816226.20140206123631@eikelenboom.it> Date: Thu, 6 Feb 2014 12:36:31 +0100 From: Sander Eikelenboom <linux@...elenboom.it> To: Dan Williams <dan.j.williams@...el.com> CC: Francois Romieu <romieu@...zoreil.com>, "netdev@...r.kernel.org" <netdev@...r.kernel.org>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org> Subject: Re: 3.14-mw regression: rtl8169 WARNING: DMA-API: exceeded 7 overlapping mappings of pfn 55ebe 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 <romieu@...zoreil.com> wrote: >> Sander Eikelenboom <linux@...elenboom.it> : >> [...] >>> 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] <IRQ> [<ffffffff81acbcfa>] dump_stack+0x46/0x58 >>> Jan 26 11:36:26 serveerstertje kernel: [ 89.227907] [<ffffffff810bdf62>] warn_slowpath_common+0x82/0xb0 >>> Jan 26 11:36:26 serveerstertje kernel: [ 89.238678] [<ffffffff810be031>] warn_slowpath_fmt+0x41/0x50 >>> Jan 26 11:36:26 serveerstertje kernel: [ 89.249336] [<ffffffff81471c5a>] ? active_pfn_read_overlap+0x3a/0x70 >>> Jan 26 11:36:26 serveerstertje kernel: [ 89.259904] [<ffffffff814729e3>] add_dma_entry+0x103/0x130 >>> Jan 26 11:36:26 serveerstertje kernel: [ 89.270416] [<ffffffff81472de6>] debug_dma_map_page+0x126/0x150 >>> Jan 26 11:36:26 serveerstertje kernel: [ 89.280840] [<ffffffff81714686>] 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 netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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