On Mon, May 08, 2023 at 02:57:15PM -0600, Alex Williamson wrote: > We already try to set the flags in advance, but there are some > architectural flags like VM_PAT that make that tricky. Cedric has been > looking at inserting individual pages with vmf_insert_pfn(), but that > incurs a lot more faults and therefore latency vs remapping the entire > vma on fault. I'm not convinced that we shouldn't just attempt to > remove the fault handler entirely, but I haven't tried it yet to know > what gotchas are down that path. Thanks, I thought we did it like this because there were races otherwise with PTE insertion and zapping? I don't remember well anymore. I vaugely remember the address_space conversion might help remove the fault handler? Jason
