[RFC PATCH 0/3] vfio/type1: Reduce vfio_iommu.lock contention

[Alex Williamson]

Hi Yan,

I wonder if this might reduce the lock contention you're seeing in the
vfio_dma_rw series.  These are only compile tested on my end, so I hope
they're not too broken to test.  Thanks,

Alex

---

Alex Williamson (3):
      vfio/type1: Convert vfio_iommu.lock from mutex to rwsem
      vfio/type1: Replace obvious read lock instances
      vfio/type1: Introduce pfn_list mutex


 drivers/vfio/vfio_iommu_type1.c |   67 ++++++++++++++++++++++++---------------
 1 file changed, 41 insertions(+), 26 deletions(-)