On Mon, Mar 16, 2020 at 08:46:59AM -0700, Christoph Hellwig wrote:

On Fri, Mar 06, 2020 at 09:09:19AM -0400, Jason Gunthorpe wrote:

quoted

This is why release must do invalidate all - but it doesn't need to do
any more - as no SPTE can be established without a mmget() - and
mmget() is no longer possible past release.

Maybe we should rename the release method to invalidate_all?

It is a better name. The function it must also fence future access if
the mirror is not using mmget(), and stop using the pgd/etc pointer if
the page tables are accessed directly.

Jason

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