Messages in this thread | | | Subject | Re: 3.14-mw regression: rtl8169 WARNING: DMA-API: exceeded 7 overlapping mappings of pfn 55ebe | From | Eric Dumazet <> | Date | Tue, 11 Feb 2014 20:17:41 -0800 |
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On Tue, 2014-02-11 at 18:07 -0800, Dan Williams wrote:
> The overlap granularity is too large. Multiple dma_map_single > mappings are allowed to a given page as long as they don't collide on > the same cache line. >
I am not sure why you try number of mappings of a page.
Try launching 100 concurrent netperf -t TCP_SENFILE
Same page might be mapped more than 100 times, more than 10000 times in some cases.
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