On Mon, 7 Jul 2014, Lennart Poettering wrote:
For the test, e.g. ConditionVirtualization, there would be no difference.
I only distinguished this in order to have systemd-detect-virt showing the
correct virtualization technology.
Sure we could cover everything under something like, e.g. "s390 virtualization".
But I thought it is smarter to give this little additional information.
Maybe there are some cases where someone needs to know in more detail which
virtualization is running.
Again, what precisely is the difference between the two virtualizations you
wanted to distinguish?
IMHO the main difference is the level of maturity.
z/VM is about 30 years old and has a huge amount of tools for everything you
could imagine. KVM is relatively new and under heavy development.
Furthermore, KVM is bound to the linux kernel, while z/VM is not.
Finally, KVM could theoretically run inside z/VM (thought it doesn't make sense
running KVM on an already virtualized CPU) but not vice-versa.
Kay, my colleague Ihno told me that you were working in the s390 department at
SUSE.
Any opinion about the use of distinguishing z/VM from KVM under s390?
Regards
Thomas
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