> I will post a patch to fix it. How about always keep node0 unhotpluggable ? Node 0 (or more specifically the node that contains memory <4GB) will be full of BIOS reserved holes in the memory map. It probably isn't removable even if Linux thinks it is. Someday we might have a smart BIOS that can relocate itself to another node - but for now making node0 unhotpluggable looks to be a plausible interim move. Ultimately we'd like to be able to remove any node (just not all of them at the same time ... just like we can now offline any cpu - but not all of them together). -Tony -- 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