On Fri, 3 Dec 2021 11:15:41 +0800, Kai-Heng Feng wrote:
> When Samsung PCIe Gen4 NVMe is connected to Intel ADL VMD, the
> combination causes AER message flood and drags the system performance
> down.
>
> The issue doesn't happen when VMD mode is disabled in BIOS, since AER
> isn't enabled by acpi_pci_root_create() . When VMD mode is enabled, AER
> is enabled regardless of _OSC:
> [ 0.410076] acpi PNP0A08:00: _OSC: platform does not support [AER]
> ...
> [ 1.486704] pcieport 10000:e0:06.0: AER: enabled with IRQ 146
>
> [...]
Applied to pci/vmd, thanks!
[1/1] PCI: vmd: Honor ACPI _OSC on PCIe features
https://git.kernel.org/lpieralisi/pci/c/04b12ef163
Thanks,
Lorenzo
