On Tue, 25 Jun 2024 15:11:30 -0400 "Liam R. Howlett" <Liam.Howlett@xxxxxxxxxx> wrote: > It is now possible to walk the vma tree using the rcu read locks and is > beneficial to do so to reduce lock contention. Doing so while a > MAP_FIXED mapping is executing means that a reader may see a gap in the > vma tree that should never logically exist - and does not when using the > mmap lock in read mode. The temporal gap exists because mmap_region() > calls munmap() prior to installing the new mapping. What are the consequences when this race hits? IOW, why do we need to change anything?
