On Tue, 13 Aug 2013, Minchan Kim wrote: > VM sometime want to migrate and/or reclaim pages for CMA, memory-hotplug, > THP and so on but at the moment, it could handle only userspace pages > so if above example subsystem have pinned a some page in a range VM want > to migrate, migration is failed so above exmaple couldn't work well. Dont we have the mmu_notifiers that could help in that case? You could get a callback which could prepare the pages for migration? -- 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>