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Re: MP kernels broken with version 5.4.0-1



On 20.02.22 19:34, Michael Cree wrote:
On Sun, Feb 20, 2022 at 01:39:44PM +0100, Frank Scheiner wrote:
I'm unsure if someone already noticed, but it looks like the MP kernels
for the alpha arch are broken since at least 5.4.0-1 ([1]), tested on:

* quad processor ES45 (with 5.4.0-1, 5.7.0-1)
* single processor AS 800 (with 5.7.0-1)
* dual processor DS25 (with 5.4.0-1 and 5.15.0-1)

Commit f2f84b05e02b7710a201f0017b3272ad7ef703d1 is the problem.
Reverting that results in a working SMP kernel, at least up to
version 5.8.y.

Great! I hoped you would have a look. :-)

There is another problem (causing occassional memory corruptions
in user space) introduced into the 5.9.0 kernel which has proved
tricky to nail down.  I have an idea where it is but not what
the actual problem is.

I think I can confirm that, because the panic on my DS25 with 5.15.0-1
looks different than with 5.4.0-1. I didn't create a log, but IIRC the
panic originated from systemd there.

How should we proceed from here?

Cheers,
Frank


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