Re: [PATCH RFC v4 00/13] virtio-mem: paravirtualized memory

[Alex Shi]

在 2020/6/5 下午5:36, David Hildenbrand 写道:
> I guess I know what's happening here. In case we only have DMA memory
> when booting, we don't reserve swiotlb buffers. Once we hotplug memory
> and online ZONE_NORMAL, we don't have any swiotlb DMA bounce buffers to
> map such PFNs (total 0 (slots), used 0 (slots)).
> 
> Can you try with "swiotlb=force" on the kernel cmdline?

Yes, it works fine with this cmdline. problems gone,