> On Dec 6, 2019, at 4:38 PM, Cong Wang <xiyou.wangc...@gmail.com> wrote:
>
> 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.
Can you at least have a changelog compared to previous versions?
>
> Cong Wang (3):
> iommu: avoid unnecessary magazine allocations
> iommu: optimize iova_magazine_free_pfns()
> iommu: avoid taking iova_rbtree_lock twice
> ---
> drivers/iommu/iova.c | 75 ++++++++++++++++++++++++++------------------
> 1 file changed, 45 insertions(+), 30 deletions(-)
>
> --
> 2.21.0
>
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