On Wed, Aug 02, 2023 at 05:42:23PM +0100, Ryan Roberts wrote: > - avoid the split lock contention by using mmu gather (suggested by Kirill) [Offlist] So, my idea is to embed struct deferred_split into struct mmu_gather and make zap path to use it instead of per-node/per-memcg deferred_split. This would avoid lock contention. If the list is not empty after zap, move the to the per-node/per-memcg deferred_split. But it is only relevant if we see lock contention. -- Kiryl Shutsemau / Kirill A. Shutemov
