linux-kernel - [RFC PATCH 0/3] vfio/type1: Reduce vfio

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Message-ID: <157919849533.21002.4782774695733669879.stgit@gimli.home>
Date:   Thu, 16 Jan 2020 11:17:49 -0700
From:   Alex Williamson <alex.williamson@...hat.com>
To:     yan.y.zhao@...el.com
Cc:     kvm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [RFC PATCH 0/3] vfio/type1: Reduce vfio_iommu.lock contention

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(-)