On Friday 05 June 2009, FUJITA Tomonori wrote: > I think that the better fix can handle both cases per device: > > - multiple identical dma addresses should not happen (with devices > behind hardware IOMMU) > - multiple identical dma addresses could happen I guess you could also have the case where for a given range of addresses, you use a linear mapping and the dma addresses can be identical, while for other physical addresses you would rely on address translation. For example on PowerPC/Cell with infiniband adapters, you can get linear mapping behavior for DMA_ATTR_WEAK_ORDERING but IOMMU translation without that flag, for the same device and same physical address. Arnd <>< -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
