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I think temporarily revokes here means it is revoked from a dmabuf perspective Just that VFIO can make it's internal dmabuf work again, there won't be a notification to any importer or an expectation that something like iommufd will re-establish mapping automatically. This is principally a kernel self protection mechanism where the userspace was expected to have removed the dmabuf before issuing a reset/etc. If they didn't then the kernel plonks it and userspace gets a mess to clean up. Jason