On Tue, Jun 02, 2020 at 04:45:05AM -0400, Michael S. Tsirkin wrote: > So vhost needs to poke at userspace *a lot* in a quick succession. It > is thus benefitial to enable userspace access, do our thing, then > disable. Except access_ok has already been pre-validated with all the > relevant nospec checks, so we don't need that. Add an API to allow > userspace access after access_ok and barrier_nospec are done.
This is the wrong way to do it, and this API is certain to be abused elsewhere. NAK - we need to sort out vhost-related problems, but this is not an acceptable solution. Sorry.
