On Thu, Nov 19, 2020 at 12:59:01PM -0500, Andrea Arcangeli wrote: > Hello everyone, > > We identified some PCD set on the direct mapping causing hardly > reproducible performance issues and this patch fixes the ultimate root > cause. > > The caller for now has been tweaked to avoid triggering this case (now > that we know about it)
What is the callers? The whole SetPageReservered + ioremap* thing you mention in the actual patch is completely bogus. I think we'll need to reject that as well and fix the caller.
