Comment 6 for bug 1966499

Same here, rollback to .35 and have a hold on that version until a fix released. Behaviour aligns with comments on related thread - only when passing through a PCIe GPU to a (linux in my case) guest. Drop the VM back to QEMU graphics, serial terminal or other and this logspam does not materialise.

Snip of log, can provide more, however very similar to first report.

Mar 22 07:43:27 giskard kernel: [ 295.128031] ------------[ cut here ]------------
Mar 22 07:43:27 giskard kernel: [ 295.128124] RIP: 0010:vmx_sync_pir_to_irr+0x9f/0xc0 [kvm_intel]
Mar 22 07:43:27 giskard kernel: [ 295.128137] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8bb030e90000
Mar 22 07:43:27 giskard kernel: [ 295.128143] <TASK>
Mar 22 07:43:27 giskard kernel: [ 295.128271] __x64_sys_ioctl+0x91/0xc0
Mar 22 07:43:27 giskard kernel: [ 295.128286] entry_SYSCALL_64_after_hwframe+0x44/0xae
Mar 22 07:43:27 giskard kernel: [ 295.128295] RBP: 0000560f97b50c70 R08: 0000560f966401f0 R09: 00000000ffffffff
Mar 22 07:43:27 giskard kernel: [ 295.128317] WARNING: CPU: 4 PID: 8318 at arch/x86/kvm/vmx/vmx.c:6336 vmx_sync_pir_to_irr+0x9f/0xc
0 [kvm_intel]
Mar 22 07:43:27 giskard kernel: [ 295.128417] Code: 83 c4 10 5b 5d c3 48 89 df e8 5d 6c 12 00 8b 93 00 03 00 00 89 45 ec 83 e2 20 8
5 d2 75 d2 89 c7 e8 f6 fd ff ff 8b 45 ec eb c6 <0f> 0b eb 86 f0 80 4b 39 40 8b 93 00 03 00 00 8b 45 ec 83 e2 20 eb
Mar 22 07:43:27 giskard kernel: [ 295.128425] R13: 0000000000000000 R14: ffffb071854f23e0 R15: ffff8bafc4d43080
Mar 22 07:43:27 giskard kernel: [ 295.128432] vcpu_enter_guest+0x354/0x11e0 [kvm]
Mar 22 07:43:27 giskard kernel: [ 295.128562] do_syscall_64+0x61/0xb0
Mar 22 07:43:27 giskard kernel: [ 295.128576] RIP: 0033:0x7fcada3633db
Mar 22 07:43:27 giskard kernel: [ 295.128582] RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000015
Mar 22 07:43:27 giskard kernel: [ 295.128588] </TASK>