Hi Yasuaki, in your memory hotplug slides at LinuxCon Japan 2013, you mention "migrate vmalloc area" as one of the TODO items (slide 30 / 31): http://events.linuxfoundation.org/sites/events/files/lcjp13_ishimatsu.pdf can you further explain this problem? Isn't this case handled already from the current page migration code? Do you have a specific testcase that can trigger this issue? thanks, - Vasilis -- 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>