On 2019-10-15 09:26:09 [-0700], Matthew Wilcox wrote: > Did your test build have ALLOC_SPLIT_PTLOCKS defined?
I tried to explain that ptlock_ptr() returns NULL for the page before the ctor invocation and non-NULL afterwards which means that USE_SPLIT_PTE_PTLOCKS and ALLOC_SPLIT_PTLOCKS was defined. Sebastian
