Hi,
here is a patch-set to optimize the queue flushing in the
AMD IOMMU driver. It removes the global per-cpu flush queues
and implements queue-rings which are per-domain and per-cpu.
This allows some good optimizations to lower the flush-rate
of a domain and also lowers the contention on the queue
locks.
Regards,
Joerg
Joerg Roedel (7):
iommu/amd: Rip out old queue flushing code
iommu/amd: Add per-domain flush-queue data structures
iommu/amd: Make use of the per-domain flush queue
iommu/amd: Add locking to per-domain flush-queue
iommu/amd: Add flush counters to struct dma_ops_domain
iommu/amd: Add per-domain timer to flush per-cpu queues
iommu/amd: Remove queue_release() function
drivers/iommu/amd_iommu.c | 363 +++++++++++++++++++++++++++++-----------------
1 file changed, 227 insertions(+), 136 deletions(-)
--
2.7.4
