RE: [PATCH v1 00/16] iommufd: Add vIOMMU infrastructure (Part-4 vCMDQ)

Tian, Kevin
2025-04-24T08:21:59Z

> From: Nicolin Chen <nicolinc@nvidia.com>
> Sent: Friday, April 11, 2025 2:38 PM
>
[...]
> This is a big
> improvement since there is no VM Exit during an invalidation, compared to
> the traditional invalidation pathway by trapping a guest-own invalidation
> queue and forwarding those commands/requests to the host kernel that will
> eventually fill a HW-owned queue to execute those commands.
>

any data to show how big the improvements could be in major
IOMMU usages (kernel dma, user dma and sva)?