[vfio-users] qemu stuck when hot-add memory to a virtual machine with a device passthrough

[Wuzongyong (Euler Dept)]

Hi,

The qemu process will  stuck when hot-add large size  memory to the virtual machine
with a device passtrhough.
We found it is too slow to pin and map pages in vfio_dma_do_map.
Is there any method to improve this process?

Thanks,
Zongyong Wu

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