This patchset contains three small optimizations for the global spinlock contention in IOVA cache. Our memcache perf test shows this reduced its p999 latency down by 45% on AMD when IOMMU is enabled.
Cong Wang (3): iommu: match the original algorithm iommu: optimize iova_magazine_free_pfns() iommu: avoid taking iova_rbtree_lock twice --- drivers/iommu/iova.c | 44 +++++++++++++++++++++++++------------------- 1 file changed, 25 insertions(+), 19 deletions(-) -- 2.21.0 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu
