On Sat, 12 Oct 2024 20:05:31 +0800 Yunsheng Lin wrote: > 1. Semantics changing of supporting unlimited inflight pages > to limited inflight pages that are as large as the pool_size > of page_pool. How can this possibly work? The main thing stopping me from reposting my fix that it'd be nice to figure out if a real IOMMU device is bound or not. If we don't have real per-device mappings we presumably don't have to wait. If we can check this condition we are guaranteed not to introduce regressions, since we would be replacing a crash by a wait, which is strictly better. If we'd need to fiddle with too many internals to find out if we have to wait - let's just always wait and see if anyone complains.
