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jcalvinowenstoday at 4:48 PM1 replyview on HN

Thanks for sharing this.

Was the iommu using strict or lazy invalidation? I think lazy is the default but I'm not sure how long that's been true.


Replies

eivanov89today at 5:00 PM

We compared IOMMU fully disabled vs enabled. When it is enabled, I expect it to be lazy (should be the default for IOMMU). Note, that we recommend to use passthrough to completely bypass translation for most devices independent on strict/lazy mode.