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[Xen-devel] rochester and Debian buster


  • To: Julien Grall <julien.grall@xxxxxxx>
  • From: Ian Jackson <ian.jackson@xxxxxxxxxx>
  • Date: Thu, 24 Oct 2019 16:47:37 +0100
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  • Cc: Juergen Gross <jgross@xxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx
  • Delivery-date: Thu, 24 Oct 2019 15:47:58 +0000
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  • List-id: Xen developer discussion <xen-devel.lists.xenproject.org>

We discussed on irc the problems I have been having trying to get
buster's released kernel to run on the rochesters, which is wanted to
upgrade osstest to buster (which is currently Debian stable).

Unfortunately our previous conversations don't seem to have been
recorded anywhere.  Let's try at least to write things down now.

The symptom is that the machine thinks the network link is down, and
no network stuff happens, so the installer doesn't work.  (I don't
think I have checked at the switch end whether the link is actually
up.)

You suggested that maybe adding
  iommu.passthrough=1
to the kernel command line might help.  But it hasn't.

I have a memory of discussing the next steps and I think we discussed
upgrading the firmware.  If I remember rightly we agreed (with
Juergen) that upgrading the firmware on one of the two rochester
machines would be an acceptable risk.  Can we file a ticket to have
that done by our onsite technician ?

Other options would include trying a buster-backports kernel, if we
had some reason to think that a newer kernel would be better.
Certainly if this turns out to be a kernel bug, and a workaround is
awkward, the best fix would be to get the bugfix backported to the
Debian buster kernel (either the stable series, or -backports).

Currently I have rochester1 booked out and you are free to play with
it if you like.  We'll negotiate about that on irc.

Ian.

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