I am looking for a way to steer allocations (these may be by either userspace or the kernel) to or away from particular ranges of memory. The reason for this is that some parts of memory are different from others (i.e. some memory may be faster/slower). For instance there may be 500M of "fast" memory and 1500M of "slower" memory on a 2G platform. At the memory mini-summit last week, it was mentioned that the Super-H architecture was using NUMA for this purpose, which was considered to be an very bad thing to do -- we have ported NUMA to ARM here (as an experiment) and agree that NUMA doesn't work well for solving this problem. After the NUMA discussion, I spoke briefly to you and asked you what a good approach would be. You thought that something based on transcendent memory (which I am somewhat familiar with, having built something based upon it which can be used either as contiguous memory or as clean cache) might work, but you didn't supply any details. At the time, you asked me to email you about this and copy Dan and the linux-mm mailing list, where hopefully you or Dan might be able to explain how this would work. Thanks. Larry Bassel -- The Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>