Comment # 28 on bug 1187264 from LTC BugProxy

------- Comment From geraldsc@de.ibm.com 2021-06-17 10:04 EDT-------
(In reply to comment #30)
> openSUSE is working (the same as SUSE) with Upstream/Factory first.
> openSUSE Tumbleweed for s390x is based on Factory. openSUSE Leap is using
> the same base packages as SLES (incl. kernel) since our 15.3 (equal to 15
> SP3) release.
> Therefore, it is correct that SLES kernel patches will be available in our
> stable release openSUSE Leap, too. That is a closed partnership. SUSE is
> giving something (kernel and stable base) to openSUSE. openSUSE is giving
> applications and the latest packages to SLES.
> SUSE Kernel Developers are testing in their home branches of OBS the latest
> kernel sources (together with patches). IIf it is working as expected, that
> will be submitted to Factory (Tumbleweed). We have got a review process with
> multiple stages. That can take some days. If that all has been passed, then
> we will receive a new kernel in our rolling release openSUSE Tumbleweed.
> That is one reason that openSUSE Tumbleweed is recommended for Developers.
> We are receiving all with possible latest versions from upstream.
> Leap and SLES are one fork of Tumbleweed with more stability from the
> Enterprise.
>
> (In reply to LTC BugProxy from comment #24)
> > (In reply to comment #17)
> > > > Which kernel version is this, and where can we find the corresponding source
> > > > code?
> > So does that mean that you use the vanilla upstream version (tag v5.12.9 in
> > this case) for openSUSE Tumbleweed, w/o any additional distro patches on top?
> >
> > But then what do you mean with "Patched kernel sources are (master) here"?
> > The master branch in that repo is on 5.13-rc6 level...
> The openSUSE kernel is maintained by SUSE Kernel Developers. Therefore, the
> upstream version is in a testing phase and has to pass our multiple staging
> and review stages. Then we will receive this new kernel (from master) as a
> new rolling release kernel version.
>
> I heard a nice joke from a conference:
> The openSUSE/SUSE chameleon is a penguin with many SUSE kernel patches.

Sorry, I cannot make any sense of this, or see how it would answer the (very
simple) question "where can we find the matching kernel source for the kernel
version that showed the problem".

So, I decided to help myself, and found at least some rpms which you can use to
extract the source: http://download.opensuse.org/tumbleweed/repo/oss/noarch/
You need kernel-devel and kernel-source noarch.rpm, just like with SLES. A
proper git access similar to SLES would of course be nice, but the rpms are
surely better than nothing.

Feel free to bookmark this, just in case anybody should ask you that question
again in the future.

If we now could also get the kernel messages, we would also know (for sure)
which kernel version you were using, and also see why the kernel thinks that it
found bad pages or rss-counters.

Please also try to answer the question about the host kernel version, as we
won't be able to see that from the guest kernel messages. If you find the time,
reproduction with THP disabled would also be appreciated, but that is more out
of curiosity, and won't (immediately) help to make any progress, as opposed to
the other questions.