RPI 4B on UEFI: xhci0 disconnects under high load

[Mark Millard]

On 2020-Sep-25, at 03:39, Robert Crowston <crowston at protonmail.com> wrote:

> Could the failure of the ACPI patch to work be related to the pre-September 2020 dtbs reporting 4 GB available for pci DMA (as you reported today in another thread)?
> 

I'm unclear if you are specifically referring to:

A) this thread's "disconnects under high load" failures?
B) the huge file duplication and diff/cmp test failures?
C) both?
D) even more?

For (A) I'd not conclude much until results are in for
FreeBSD that is head -r365918 or later. It might be a
fixed problem.

For (B), I've been reporting examples of the issue since
2020-Jun-21 using rpi4-uefi-devel v1.16 and head -r360311 .
But my most recent reports are based on the modern dtb that
has 3 GiByte for the size of the range (uefi v1.20 and its
bundled RPI4B materials or newer raspberry pi materials)
and head -r365932. So both old and new got the same type
of failures. (I've not tested materials from prior to
2020-Jun-21 with > 3072 MiByte in this way: that is when
I discovered the test.)

Does that answer your question?

===
Mark Millard
marklmi at yahoo.com
( dsl-only.net went
away in early 2018-Mar)