Unrelenting testplan D25219

[myfreeweb]

On June 12, 2020 3:02:22 PM UTC, Robert Crowston <crowston at protonmail.com> wrote:
>I have seen this behaviour when the xhci controller was unable to perform DMA. In my case I had the system memory configuration incorrectly encoded on the pci-e controller.
>
>What is the physical address to which the xhci controller is performing DMA? It needs to be in the lower 3 GB of the physical address space.

On my 4gb, when the controller was unable to DMA (mem limit off and no efi memory map patch) there were just disk errors, i.e. garbage instead of memstick contents.

It's easy to test whether this is a DMA>3gb issue – just enable the mem limit in the firmware.