here's some more error log from centos guest: Mar 7 05:38:07 localhost kernel: NVRM: loading NVIDIA UNIX x86_64 Kernel Module 375.39 Tue Jan 31 20:47:00 PST 2017 (using threaded interrupts) Mar 7 05:38:08 localhost kernel: nvidia-modeset: Loading NVIDIA Kernel Mode Setting Driver for UNIX platforms 375.39 Tue Jan 31 19:41:48 PST 2017 Mar 7 05:39:27 localhost kernel: NVRM: RmInitAdapter failed! (0x24:0x51:1060) Mar 7 05:39:27 localhost kernel: NVRM: rm_init_adapter failed for device bearing minor number 0 Mar 7 05:43:40 localhost kernel: NVRM: RmInitAdapter failed! (0x24:0x51:1060) Mar 7 05:43:40 localhost kernel: NVRM: rm_init_adapter failed for device bearing minor number 0 Mar 8 05:07:47 localhost kernel: nvidia: module license 'NVIDIA' taints kernel. Mar 8 05:07:47 localhost kernel: NVRM: loading NVIDIA UNIX x86_64 Kernel Module
2017-03-08 14:31 GMT+08:00 rhett rhett <rhett.ker...@gmail.com>: > i have two guest , a windows 2008 server and a centos 7.2 . in windows, > the device manager said the gpu can't start ,error code 10. > in centos, when i run nvidia-smi, it said no device found. > > no specil vm configurations, whit the same config, i can use gpu > successfully in my two gpu server. the biggest different is , that server > is no pcie switcher. > > 2017-03-08 11:55 GMT+08:00 Alex Williamson <alex.william...@redhat.com>: > >> On Wed, 8 Mar 2017 11:26:17 +0800 >> rhett rhett <rhett.ker...@gmail.com> wrote: >> >> > two gpus share the same irq , i found the reason. because the msi be >> > disabled later , so irq 140 is being reused. >> > >> > but i don't know why somebady calls vfio_pci_ioctl to disable the msi. >> >> vfio just does what the guest requests, but you're really providing >> hardly any more information than when you asked off list. My wild >> guess, is that maybe you're running a Windows guest and not configuring >> the VM for a vCPU type where Windows supports MSI. For more >> assistance, please provide basic information, like the QEMU command >> line or VM XML, also the PCI information from the host (sudo lspci >> -vvv), and of course any error codes in the guest or an actual >> description of how the device doesn't work in the guest. Thanks, >> >> Alex >> >> >> > 2017-03-08 10:55 GMT+08:00 rhett rhett <rhett.ker...@gmail.com>: >> > >> > > i have a question about vfio , here is my description. >> > > >> > > i have 8 gpus in my server machine , but they are all behind a pcie >> > > bridge. when i make a vfio passthrough , i can't use the gpus in my >> guest >> > > os. >> > > dmesg shows the following message >> > > >> > > [ 662.208072] vfio-pci 0000:87:00.0: irq 140 for MSI/MSI-X >> > > [ 725.761623] vfio-pci 0000:04:00.0: irq 140 for MSI/MSI-X >> > > >> > > i started two vm , one use 87 and another use 04, dmesg shows that >> they >> > > share the same irq 140 . is this normal ? >> > > >> > > i also saw the iommu groups, each gpu stays in a separate group， and >> with >> > > no other device in group. so this means ACS works correctly ? >> > > >> > > hope to get your helps ! >> > > >> >> >
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