where do i put this line

[arrcy]

pcie_acs_override=downstream

i want to use it but the wiki doesnt tell where i have to put it
what i am thinking is
nano /etc/default/grub
change GRUB_CMDLINE_LINUX_DEFAULT="quiet intel_iommu=on"
to GRUB_CMDLINE_LINUX_DEFAULT="quiet intel_iommu=on pcie_acs_override=downstream"

pls let me know if this is correct

 

[Stefan_R]

That is correct, if you're using GRUB (anything but ZFS-root on UEFI uses GRUB, otherwise it'd be /etc/kernel/cmdline). I'll add it to the wiki for future reference.

PS: Don't forget to run 'update-grub' after!