On Tue, Apr 18, 2023 at 03:12:47PM -0400, Johannes Weiner wrote: > This series proposes to make THP allocations reliable by enforcing > pageblock hygiene, and aligning the allocator, reclaim and compaction > on the pageblock as the base unit for managing free memory. All orders > up to and including the pageblock are made first-class requests that > (outside of OOM situations) are expected to succeed without > exceptional investment by the allocating thread. > > A neutral pageblock type is introduced, MIGRATE_FREE. The first > allocation to be placed into such a block claims it exclusively for > the allocation's migratetype. Fallbacks from a different type are no > longer allowed, and the block is "kept open" for more allocations of > the same type to ensure tight grouping. A pageblock becomes neutral > again only once all its pages have been freed. YES! This is exactly what I've been thinking is the right solution for some time. Thank you for doing it.
