On Thu, Mar 25, 2021 at 7:34 AM Jason Gunthorpe <jgg@xxxxxxxx> wrote: > > On Thu, Mar 18, 2021 at 10:03:06AM -0700, Dan Williams wrote: > > Yes. I still need to answer the question of whether mapping > > invalidation triggers longterm pin holders to relinquish their hold, > > but that's a problem regardless of whether gup-fast is supported or > > not. > > It does not, GUP users do not interact with addres_space or mmu > notifiers > Ok, but the SIGKILL from the memory_failure() will drop the pin? Can memory_failure() find the right processes to kill if the memory registration has been passed by SCM_RIGHTS?
