On Tue, 7 Nov 2017, Vlastimil Babka wrote: > > Migrate pages moves the pages of a single process there is no TARGET > > process. > > migrate_pages(2) takes a pid argument > > "migrate_pages() attempts to move all pages of the process pid that > are in memory nodes old_nodes to the memory nodes in new_nodes. " Ok missed that. Most use cases here are on the current process. Fundamentally a process can have shared pages outside of the cpuset that a process is restricted to. Thus I would think that migration to any of the allowed nodes of the current process that is calling migrate pages is ok. The caller wants this and the caller has a right to allocate on these nodes. It would be strange if migrate_pages would allow allocation outside of the current cpuset. > > Thus thehe *target* nodes need to be a subset of the current cpu set. And therefore the above still holds. -- 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>
