Bug#760148: CPU grind occurs on multi-boot

[Dominique Brazziel]

I get this long running effect one system which contains 
Debian, Fedora and Windows XP.  The longest time is spent with
grub-mount running and much I/O.  

>From the output (systemd log) I see the gap between timestamps when
mounted tests and subtests are run against the Fedora partition:

Sep 27 07:37:02 debianx 50mounted-tests: debug: running subtest /usr/lib/os-probes/mounted/83haiku
Sep 27 07:37:02 debianx 83haiku: debug: /dev/mapper/vg_fedora-lv_root is not a BeFS partition: exiting
Sep 27 07:37:02 debianx 50mounted-tests: debug: running subtest /usr/lib/os-probes/mounted/90linux-distro
<* snip *> 
Sep 27 07:43:06 debianx 90linux-distro: result: /dev/mapper/vg_fedora-lv_root:Fedora release 24 (Twenty Four):Fedora:linux

So, it looks like subtest 90linux-distro is having trouble finding what it's looking for.