What were you trying to do that didn't work?

In a test we are using "nproc --all" to take all the CPUs on the machine so we could run tasks in parallel with taskset. In a virtual s390x machine with 2 cores the command return that it has 64 cores (I imagine is the total cores of the parent machine) and it didn't agree with the lscpu comand output.

$ nproc --all
64
$ lscpu
...
CPU(s):                   2
...

What is the impact of this issue to you?

Low since we can migrate to lscpu

Please provide the package NVR for which the bug is seen:

coreutils-9.5-5.el10.s390x.rpm
coreutils-common-9.5-5.el10.s390x.rpm
coreutils-single-9.5-5.el10.s390x.rpm

How reproducible is this bug?:

Always

Steps to reproduce

1. Run "nproc --all" to an s390x virtual machine

Expected results

nproc --all will give me the cores of the virtual machine

Actual results

nproc --all give me more cores (probably all the cores on the physical machine)