Comment # 9 on bug 1189791 from Berthold Gunreben

There has not been a lot of development on this topic lately, so let me
emphasize on possible impacts.

The fact that I found the issue with btrfs does not necessarily mean, that this
is the only filesystem where the issue exists. Due to the nature of the
filesystem, it quickly detects file corruptions.

However, it is quite possible, that all filesystems are affected, just with
other filesystems there might be unnoticed data corruption. Until this is
clarified, the HyperPAV Feature as invented with z/VM 7.2 is not usable for me.

Unfortunately, I do not have z/VM 7.2 available right now, and thus cannot do
further tests on my own.