在 2020/1/9 下午9:48, David Hildenbrand 写道: > Ping, > > I'd love to get some feedback on > > a) The remaining MM bits from MM folks (especially, patch #6 and #8). > b) The general virtio infrastructure (esp. uapi in patch #2) from virtio > folks. > > I'm planning to send a proper v1 (!RFC) once I have all necessary MM > acks. In the meanwhile, I will do more testing and minor reworks (e.g., > fix !CONFIG_NUMA compilation). Hi David, Thanks for your work! I am trying your https://github.com/davidhildenbrand/linux.git virtio-mem-v5 which works fine for me, but just a 'DMA error' happens when a vm start with less than 2GB memory, Do I missed sth? Thanks Alex (qemu) qom-set vm0 requested-size 1g (qemu) [ 26.560026] virtio_mem virtio0: plugged size: 0x0 [ 26.560648] virtio_mem virtio0: requested size: 0x40000000 [ 26.561730] systemd-journald[167]: no db file to read /run/udev/data/+virtio:virtio0: No such file or directory [ 26.563138] systemd-journald[167]: no db file to read /run/udev/data/+virtio:virtio0: No such file or directory [ 26.569122] Built 1 zonelists, mobility grouping on. Total pages: 513141 [ 26.570039] Policy zone: Normal (qemu) [ 32.175838] e1000 0000:00:03.0: swiotlb buffer is full (sz: 81 bytes), total 0 (slots), used 0 (slots) [ 32.176922] e1000 0000:00:03.0: TX DMA map failed [ 32.177488] e1000 0000:00:03.0: swiotlb buffer is full (sz: 81 bytes), total 0 (slots), used 0 (slots) [ 32.178535] e1000 0000:00:03.0: TX DMA map failed my qemu command is like this: qemu-system-x86_64 --enable-kvm \ -m 2G,maxmem=16G -kernel /root/linux-next/$1/arch/x86/boot/bzImage \ -smp 4 \ -append "earlyprintk=ttyS0 root=/dev/sda1 console=ttyS0 debug psi=1 nokaslr ignore_loglevel" \ -hda /root/CentOS-7-x86_64-Azure-1703.qcow2 \ -net user,hostfwd=tcp::2222-:22 -net nic -s \ -object memory-backend-ram,id=mem0,size=3G \ -device virtio-mem-pci,id=vm0,memdev=mem0,node=0,requested-size=0M \ --nographic
