On 09/21/2016 11:20 AM, Michal Hocko wrote: > I would even question the per page block offlining itself. Why would > anybody want to offline few blocks rather than the whole node? What is > the usecase here? The original reason was so that you could remove a DIMM or a riser card full of DIMMs, which are certainly a subset of a node. With virtual machines, perhaps you only want to make a small adjustment to the memory that a VM has. Or, perhaps the VM only _has_ one node. Granted, ballooning takes care of a lot of these cases, but memmap[] starts to get annoying at some point if you balloon too much memory away. -- 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>