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. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
