KVM Archive on lore.kernel.org
 help / color / Atom feed
* [RFC PATCH 0/3] vfio/type1: Reduce vfio_iommu.lock contention
@ 2020-01-16 18:17 Alex Williamson
  2020-01-16 18:17 ` [RFC PATCH 1/3] vfio/type1: Convert vfio_iommu.lock from mutex to rwsem Alex Williamson
                   ` (3 more replies)
  0 siblings, 4 replies; 5+ messages in thread
From: Alex Williamson @ 2020-01-16 18:17 UTC (permalink / raw)
  To: yan.y.zhao; +Cc: kvm, linux-kernel

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(-)


^ permalink raw reply	[flat|nested] 5+ messages in thread

end of thread, back to index

Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-01-16 18:17 [RFC PATCH 0/3] vfio/type1: Reduce vfio_iommu.lock contention Alex Williamson
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

KVM Archive on lore.kernel.org

Archives are clonable:
	git clone --mirror https://lore.kernel.org/kvm/0 kvm/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 kvm kvm/ https://lore.kernel.org/kvm \
		kvm@vger.kernel.org
	public-inbox-index kvm

Example config snippet for mirrors

Newsgroup available over NNTP:
	nntp://nntp.lore.kernel.org/org.kernel.vger.kvm


AGPL code for this site: git clone https://public-inbox.org/public-inbox.git