Cuda programs and nvidia-smi take many seconds to start with 460.27.04 driver

I’m running Fedora 33 and just upgraded to Linux 5.9.16 and NVIDIA 460.27.04 drivers. I’m seeing occasional short hangs which are 100% reproducible when running cuda programs, including nvidia-smi.

If I time a run of nvidia-smi, it takes more than 8 seconds to run. A portion of the time while it is running, my mouse stops responding, but comes back intermittently, and then behaves normally after nvidia-smi completes.

If I run journalctl, I can see that I reliably get kernel warnings each time I run that look like

Dec 29 10:21:54 kernel: NVRM: GPU 0000:09:00.0: rm_init_adapter failed, device minor number 0
Dec 29 10:21:54 kernel: NVRM: GPU 0000:09:00.0: RmInitAdapter failed! (0x26:0x65:1290)
Dec 29 10:21:50 kernel: NVRM: GPU 0000:09:00.0: rm_init_adapter failed, device minor number 0
Dec 29 10:21:50 kernel: NVRM: GPU 0000:09:00.0: RmInitAdapter failed! (0x26:0x65:1290)

I’ve attached a bug report generated by the tool nvidia-bug-report.log.gz (673.0 KB)

I’ll also note that I appear to have about a 15% performance regression in my CUDA/OptiX application. Unsure if that is related to whatever is going on with CUDA startup times.

Maybe this?
https://www.phoronix.com/scan.php?page=news_item&px=Linux-Kernel-Blocking-NV-NetGPU

Possible. I was coming from 455.45 drivers and 5.9.14 kernel, so I doubt that anything so fundamental has changed?

Update: Still seeing this issue with 460.32 driver on 5.10.7 kernel.