Hi Robin,
On 14.08.2018 16:04, Robin Murphy wrote:
> While iommu_get_domain_for_dev() is the robust way for arbitrary IOMMU
> API callers to retrieve the domain pointer, for DMA ops domains it
> doesn't scale well for large systems and multi-queue devices, since the
> momentary refcount adjustment
On 17/08/18 10:36, John Garry wrote:
On 14/08/2018 14:04, Robin Murphy wrote:
While iommu_get_domain_for_dev() is the robust way for arbitrary IOMMU
API callers to retrieve the domain pointer, for DMA ops domains it
doesn't scale well for large systems and multi-queue devices, since the
momentar
On 14/08/2018 14:04, Robin Murphy wrote:
While iommu_get_domain_for_dev() is the robust way for arbitrary IOMMU
API callers to retrieve the domain pointer, for DMA ops domains it
doesn't scale well for large systems and multi-queue devices, since the
momentary refcount adjustment will lead to exc
While iommu_get_domain_for_dev() is the robust way for arbitrary IOMMU
API callers to retrieve the domain pointer, for DMA ops domains it
doesn't scale well for large systems and multi-queue devices, since the
momentary refcount adjustment will lead to exclusive cacheline contention
when multiple C
