Sander Eikelenboom <li...@eikelenboom.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.

-- 
Ueimor
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