[linux-lvm] Why does every lvm command insist on touching every pv?

[Phillip Susi <psusi cfl rr com>]

Every time I run any lvm command, it goes out and touches every pv,
causing all the disks to wake up from standby.  Why is this?  Shouldn't
a simple lvs command be able to look in the /etc/lvm/cache for what it
needs instead of touching every pv, even ones with no lvs on them?