Re: Booting a T5140 panics
Curiously, I didn't see other people's replies to my message, probably
due to not being subscribed. I figured at the point where I just
bought another SPARC, I might as well...
I've done some digging into it. The short version is that commit
7d5ec3d3 introduced the readl() at
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/tree/drivers/pci/msi.c?h=v5.14#n748
, and for reasons that are currently opaque to me not being familiar
with low-level SPARC details, that dies in a fire.
Just short-circuiting it to 1 instead of calling readl() seems to
function fine for my system, but isn't a great general solution...
(Bonus fun - my T5140 is currently booting from a /boot on a USB drive
and a / on an LSI SAS2 PCIe controller because A) the onboard SAS1
card is faulted and not obviously fixable, and B) I only figured out
how to get the SAS2 disks to show up as a bootable device by loading
the FCode blob onto the card after I did the install...I should
probably migrate that at some point.)
Last bit of fun is that Linux seems to be misinterpreting the
local-mac-address? setting and just unconditionally overriding
_everything_'s MAC with the system's, whether it's set to true or
false. (Amusingly, the "niu" driver has special casing for this and
instead of setting everything to e.g. 00:aa:aa:aa:aa:aa, sets the
first port to 00:aa:aa:aa:aa:aa, second to 00:aa:aa:aa:aa:ab, and so
on.)
- Rich
On Tue, Nov 16, 2021 at 3:39 AM John Paul Adrian Glaubitz
<glaubitz@physik.fu-berlin.de> wrote:
>
> Hello Rich!
>
> On 11/16/21 04:19, Rich wrote:
> > Anybody have a suggestion for how to not get burned by this? I can try
> > just booting older and older snapshots, but I only have so many
> > burnable discs.
>
> Try this image which has a 4.19 kernel which is known to be less problematic
> on older SPARCs:
>
> > https://cdimage.debian.org/cdimage/ports/snapshots/2019-07-16/debian-10.0-sparc64-NETINST-1.iso
>
> Adrian
>
> --
> .''`. John Paul Adrian Glaubitz
> : :' : Debian Developer - glaubitz@debian.org
> `. `' Freie Universitaet Berlin - glaubitz@physik.fu-berlin.de
> `- GPG: 62FF 8A75 84E0 2956 9546 0006 7426 3B37 F5B5 F913
>
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