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 from this list: send the line "unsubscribe linux-api" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
