hello everyone
I’m trying to enable GPU ( Nvidia's GPU ) P2P in a KVM VM. The two GPUs are
under a PCIe switch and it could do P2P in the host. But it could not do GPU
P2P even it could pass the [09/22] PCI: Add pci_peer_traffic_supported()
(https://patchwork.kernel.org/patch/7188701/) function detection in
[09/22] PCI: Add pci_peer_traffic_supported() -
Patchwork<https://patchwork.kernel.org/patch/7188701/>
patchwork.kernel.org
Add checks for topology and ACS configuration to determine whether or not peer
traffic should be supported between two PCI devices. Signed-off-by: Will Davis
A P2P DMA DMA-API/PCI map_peer_resource support for peer-to-peer
http://www.spinics.net/lists/linux-pci/msg44560.html
[PATCH 00/22] DMA-API/PCI map_peer_resource support for
...<http://www.spinics.net/lists/linux-pci/msg44560.html>
www.spinics.net
Linux PCI Bus: [PATCH 00/22] DMA-API/PCI map_peer_resource support for
peer-to-peer
So I’m thinking would this thread take this situation ( virtualization scenario
) into consideration? How could we judge whether it could support P2P in a KVM
( or XEN etc ) VM?
Thanks!
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