Re: [PATCH] mm/x86/pat: Only untrack the pfn range if unmap region

Peter Xu
2024-07-17T16:30:27Z

On Wed, Jul 17, 2024 at 04:17:12PM +0200, David Hildenbrand wrote:
> I'd be curious how a previous truncation on a file can tear down a PFNMAP
> mapping -- and if there are simple ways to forbid that (if possible).

Unfortunately, forbiding it may not work for vfio, as vfio would like to
allow none (or partial) mapping on the bars.. at least so far that's the
plan.

--
Peter Xu