Re: [PATCH v6 9/9] vfio/pci: Permanently revoke a DMABUF on request

[Jason Gunthorpe]

On Mon, Sep 14, 2026 at 03:06:18PM +0300, Leon Romanovsky wrote:
> On Mon, Sep 14, 2026 at 08:58:26AM -0300, Jason Gunthorpe wrote:
> > On Mon, Sep 14, 2026 at 02:54:56PM +0300, Leon Romanovsky wrote:
> > 
> > > So I still think that "temporarily revoked" is closer to
> > > invalidate_mappings, with some additional dma-buf documentation to lose
> > > the expectation that the buffer will become available again.
> > 
> > It really isn't, there is no expectation her that the importer has to
> > put things back like with move.
> 
> As we discussed with Christian, "move" doesn't have such expectation.
> https://lore.kernel.org/all/afb19db0-4154-443c-9d39-f905e7d17806@xxxxxxx/

"the exporter can move the buffer back when a mapping is created" is
exactly what I'm saying is not required here, iommufd will not
implement this, it only does permanent revoke.

Jason