Hi Uwe, On 2023-10-24 06:48, Uwe Kleine-König wrote: > I hesitate to actually enable it because I don't understand PCI good > enough to judge it's a safe choice for the Debian kernel. I am also not familiar with the details, but I see that PCI_P2PDMA is 'y' on both Fedora Server 38 and openSUSE Tumbleweed so probably it's not particularly unsafe. If we decide to switch it on, let's do it for arm64 too. Emanuele