After increasing dma_entry_limit limit no issue observed.
But ideal senario device is getting hung and recovery happening only
with host hard rebooting.
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qemu-system-x86_64 -name guest=fedora24 -machine
q35,accel=kvm,kernel-irqchip=split \
-enable-kvm \
-m 4G \
-smp 8,sockets=1,cores=8,threads=1 \
-device intel-iommu,intremap=on,caching-mode=on,aw-bits=48 \
-drive file=,format=raw \
-device ioh3420,i
Please find the above qemu command to lunch guest machine
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https://bugs.launchpad.net/bugs/1851664
Title:
qemu-system-x86_64: "VFIO_MAP_DMA : -28" error when we attache 6 VF's
to gue
