On Fri, Oct 10, 2008 at 09:19:08AM -0700, Yinghai Lu wrote: > anyway looking at dma_mask print out is interesting..., some uses 39, > and some use 44bits... Yes, that reflects the limitations of the device. You can see many of the common ones in include/linux/dma-mapping.h. By the way, commit 8f286c33f1e838d631f4a3260b33efce4bc5973c is a really bad idea. It is very helpful to see which bitmasks are used by real devices, and which ones aren't. It should be reverted, IMO. -- Matthew Wilcox Intel Open Source Technology Centre "Bill, look, we understand that you're interested in selling us this operating system, but compare it to ours. We can't possibly take such a retrograde step." -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html