Linux kernel 2.6.9 on ppc64. CONFIG_IOMMU_VMERGE: Cause IO segments sent to a device for DMA to be merged virtually by the IOMMU when they happen to have been allocated contiguously. This doesn't add pressure to the IOMMU allocator. However, some drivers don't support getting large merged segments coming back from *_map_sg(). Say Y if you know the drivers you are using are properly handling this case. See this item in context Full configuration for 2.6.9 on ppc64 Home   Search

More Linux Jobs