Re: ACPI timeouts when enabling KASAN

[Andrea Righi <andrea.righi@canonical.com>]

On Fri, Apr 12, 2024 at 11:43:22PM +0200, Ricardo Ribalda wrote:
> Hi

Hi Ricardo,

> 
> I am using virtme to do some CI around linux-media.
> 
> Everything works as expected, but when I enable KASAN, I am starting
> to get a lot of timeouts when the Method _PRT is executed. Eg:
> 
> [   56.335875] ACPI Error: Aborting method \_SB.PCI0._PRT due to
> previous error (AE_AML_LOOP_TIMEOUT) (20230628/psparse-529)
> [   56.529826] ACPI Error: Method execution failed \_SB.PCI0._PRT due
> to previous error (AE_AML_LOOP_TIMEOUT) (20230628/uteval-68)
> [   56.532391] virtio-pci 0000:00:02.0: can't derive routing for PCI INT A
> [   56.532823] virtio-pci 0000:00:02.0: PCI INT A: no GSI
> [   86.877471] ACPI Error: Aborting method \_SB.PCI0._PRT due to
> previous error (AE_AML_LOOP_TIMEOUT) (20230628/psparse-529)
> [   87.073854] ACPI Error: Method execution failed \_SB.PCI0._PRT due
> to previous error (AE_AML_LOOP_TIMEOUT) (20230628/uteval-68)
> [   87.075550] virtio-pci 0000:00:04.0: can't derive routing for PCI INT A
> [   87.075810] virtio-pci 0000:00:04.0: PCI INT A: no GSI
> 
> 0000:00:04.0 and 0000:00:02.0 are virtio devices (console and 9p-filesystem)
> 
> If I increase the timeout (ACPI_MAX_LOOP_TIMEOUT), then the Method is
> always executed, but it is very annoying that I have to wait more than
> 5 minutes to start the vm.
> 
> Despite not having kvm enabled, the machine is quite decent, so I
> would expect that it could run that method relatively fast.
> 
> Do you have any hint of what I should be looking at?

I'm wondering if it's a microvm-related issue...

Can you try to add --disable-microvm to your virtme command line and see
if it makes any difference?

Thanks,
-Andrea

> 
> Thanks!
> 
> ```
> # virtme-ng --version
> virtme-ng 1.23
> # qemu-system-amd64 --version
> QEMU emulator version 8.2.1 (Debian 1:8.2.1+ds-2)
> Copyright (c) 2003-2023 Fabrice Bellard and the QEMU Project developers
> # git describe
> v6.9-rc3-208-g586b5dfb51b96
> 
> # virtme-configkernel --defconfig --arch x86_64
> # scripts/config -e KASAN
> # make olddefconfig
> # make all -j 256
> # virtme-run --kdir . --mods=auto --show-command --show-boot-console
> --verbose  --cpus 2 --memory 4G --script-sh "echo HelloWorld"
> ```
> 
> 
> 
> -- 
> Ricardo Ribalda
> Software Engineer
> ribalda@google.com