Re: [systemd] v248.2 and later won't boot 4.19 kernel series

[Greg Kroah-Hartman <gregkh@linuxfoundation.org>]

On Tue, Jun 15, 2021 at 04:59:27PM +0200, Philip Müller wrote:
> Hello all,
> 
> with commit "mount-util: shortcut things after generating top-level bind
> mount" c2c331056a7c331a5478124b3cd6a34c9f539839
> (5c5753b9ea5cc012586ae90d357d460dec4301a4 in master) systemd 248.2 and
> later won't boot 4.19 kernel series. I tested 4.19.194 so far.
> 
> Lennart's  guess is that this is the mount table brokeness on old
> kernels, that newer libmount worked around. i.e. /proc/self/mountinfo on
> old kernels showed partially old data and partially new data, and
> confused the heck out of everyone. "proc on 20" with mount options
> "(rw,25)" doesn't look right at all.
> 
> If we look at 4.14 and 4.4 kernel series, those boot. 4.9 I've still to
> test, as that one didn't boot either for me.
> 
> So an idea what is missing in 4.19 kernel series? Other kernels work.

Do newer kernels work?

Any chance you can run 'git bisect' to find the offending kernel patch?

4.19 is really old, is this a stable-update-issue, or a "something
changed since 4.19 was released" type of issue?

> Systemd issue is this one: https://github.com/systemd/systemd/issues/19926

I'm running systemd 248.3 just fine here on 5.13-rc6, so this seems
odd...

thanks,

greg k-h