[Bug 219009] Random host reboots on Ryzen 7000/8000 using nested VMs (vls suspected)

[bugzilla-daemon@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=219009

Simon Labrecque (simon@wegel.ca) changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |simon@wegel.ca

--- Comment #37 from Simon Labrecque (simon@wegel.ca) ---
Wow, this bug sent me to a weird path :P I've been using a Windows VM for the
past 6 months, daily, without problem. Then suddently 2 days ago (didn't update
the kernel or anything else), my PC started randomly rebooting when under load.
Reading on problems with AMD cpus (and specifically 7950x), I bought a PSU and
swapped it. Same problem. Then the cpu (for a 7600), then the motherboard, then
the memory... same. I could 100% reproduce the problem by putting the VM under
load within 3 minutes. AFAIK, there was no MCE logged.

I finally stumbled on this thread, set kvm_amd.vls=0, and that indeed fully
fixed the problem.

I don't know how or why hyper-v was suddently enabled in my Windows VM, but
that's obviously what happened. When it did, it triggered this bug quite
violently.

-- 
You may reply to this email to add a comment.

You are receiving this mail because:
You are watching the assignee of the bug.