On Mon, 29 Jan 2007, Andrew Morton wrote: > > All 64 bit machine will only have a single zone if we have such a range > > alloc mechanism. The 32bit ones with HIGHMEM wont be able to avoid it, > > true. But all arches that do not need gymnastics to access their memory > > will be able run with a single zone. > > What is "such a range alloc mechanism"?
As I mentioned above: A function that allows an allocation to specify which physical memory ranges are permitted. > So please stop telling me what a wonderful world it is to not have multiple > zones. It just isn't going to happen for a long long time. The > multiple-zone kernel is the case we need to care about most by a very large > margin indeed. Single-zone is an infinitesimal corner-case. We can still reduce the number of zones for those that require highmem to two which may allows us to avoid ZONE_DMA/DMA32 issues and allow dma devices to avoid bunce buffers that can do I/O to memory ranges not compatible with the current boundaries of DMA/DMA32. And I am also repeating myself. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
