On Sun, 1 Oct 2017, Christoph Hellwig wrote: > up_read(&mm->mmap_sem) in the fault path is a still a complete > no-go, > > NAK Care to elaborate? What about mm/filemap.c:__lock_page_or_retry() then? Why the special handling on mm->mmap_sem with VM_FAULT_RETRY? What are the potential problems with my approach I didn't cover yet? Serious: I'm simply looking for solutions here. Nicolas
