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

[Yan Zhao]

Thank you, Alex!
I'll try it and let you know the result soon. :)

On Fri, Jan 17, 2020 at 02:17:49AM +0800, Alex Williamson wrote:
> 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(-)
>