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

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(-)


             reply index

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-01-16 18:17 Alex Williamson [this message]
2020-01-16 18:17 ` [RFC PATCH 1/3] vfio/type1: Convert vfio_iommu.lock from mutex to rwsem Alex Williamson
2020-01-16 18:18 ` [RFC PATCH 2/3] vfio/type1: Replace obvious read lock instances Alex Williamson
2020-01-16 18:18 ` [RFC PATCH 3/3] vfio/type1: Introduce pfn_list mutex Alex Williamson
2020-01-17  1:10 ` [RFC PATCH 0/3] vfio/type1: Reduce vfio_iommu.lock contention Yan Zhao

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