You can also try setting this kernel parameter
pcie_aspm.policy=performance
instead of telling the kernel to ignore it.
To check the current policy run
cat /sys/module/pcie_aspm/parameters/policy
Also don’t forget run sudo reinstall-kernels if you are using dracut befor rebooting so the kernel paramaters actually get applied.
To check if any PCI devices have ASPM enabled you can run
sudo lspci -vvv | grep "ASPM .*abled"