使用libvirt直通GPU时qemu – vfio_dma_map错误

2019年7月21日 563次阅读

这是qemu日志

2016-08-28T02:52:05.699498Z qemu-system-x86_64: -device vfio-pci,host=01:00.0,bus=root.1,addr=00.0,multifunction=on,x-vga=on: vfio_dma_map(0x7f67ea3b3e10, 0x100000, 0xbff00000, 0x7f6651d00000) = -12 (Cannot allocate memory)
2016-08-28T02:52:05.847310Z qemu-system-x86_64: -device vfio-pci,host=01:00.0,bus=root.1,addr=00.0,multifunction=on,x-vga=on: vfio_dma_map(0x7f67ea3b3e10, 0x100000000, 0xae400000, 0x7f6711c00000) = -12 (Cannot allocate memory)
2016-08-28T02:52:05.847323Z qemu-system-x86_64: -device vfio-pci,host=01:00.0,bus=root.1,addr=00.0,multifunction=on,x-vga=on: vfio: memory listener initialization failed for container
2016-08-28T02:52:05.847330Z qemu-system-x86_64: -device vfio-pci,host=01:00.0,bus=root.1,addr=00.0,multifunction=on,x-vga=on: vfio: failed to setup container for group 1
2016-08-28T02:52:05.847440Z qemu-system-x86_64: -device vfio-pci,host=01:00.0,bus=root.1,addr=00.0,multifunction=on,x-vga=on: vfio: failed to get group 1

dmesg的：

[  356.004278] vfio_pin_pages: RLIMIT_MEMLOCK (7218397184) exceeded
[  356.004446] vfio_pin_pages: RLIMIT_MEMLOCK (7218397184) exceeded
[  356.371582] vfio_pin_pages: RLIMIT_MEMLOCK (7218397184) exceeded
[  356.371698] vfio_pin_pages: RLIMIT_MEMLOCK (7218397184) exceeded

libvirt版本：

Compiled against library: libvirt 1.2.9
Using library: libvirt 1.2.9
Using API: QEMU 1.2.9
Running hypervisor: QEMU 2.1.2

尝试设置ulimit -l限制没用

root@debian:/home/deb# ulimit -l
unlimited

最佳答案 在以非root用户身份运行VFIO时遇到同样的问题,因为这里似乎没有解决方案.我通过在/etc/security/limits.d/99-memlock.conf中为用户“user”添加1G内存“1048576”来增加锁定内存的限制(无论如何我的系统).

   user hard memlock 1048576
   user soft memlock 1048576
点赞