sysctl.d/50-default.conf in aaa_base has new defaults:

    Remove kernel.pid_max limit (bsc#1219038)
    
    kernel.pid_max is one of multiple mechanisms to restrict number of
    processes [1]. Its kernel default is scaled with nr_cpus but 1024
    tasks/cpu cap is too much if they were all running and it is also too
    little when they are idle (memory being bottleneck).
    
    Bump the limit to maximum kernel-accepted value and defer to other
    mechanisms for tasks limit enforcing.
    
    (This way we converge to same config like upstream systemd [2] but we
    ship distro defaults together from this package.)
    
    [1] https://www.suse.com/support/kb/doc/?id=000020429
    [2] https://github.com/systemd/systemd/blob/72192b6cc9b856c10abc7f1e5f98240fde17b8b4/sysctl.d/50-pid-max.conf