Bug#791869: lvm2: updating src:lvm2 from 2.02.111-2.2 to 2.02.122-1 breaks booting, mounting LVs other than / fails

[Bastian Blank]

Hi Peter

Currently I think that all this problems are related to missing or
broken pvscan --cache calls.

I found one problematic case regarding coldplug; I believe Redhat does
not longer use this code path.  In none of my tests the "artificial" add
event triggers pvscan as it should.  The udev rules test for
LVM_MD_PV_ACTIVATED, which is never set in this case.  My quick fix is
to ignore if the event is actually change.

Bastian

On Sat, Jul 25, 2015 at 09:21:47PM +0200, Bastian Blank wrote:
> Okay, detection of lvm on md have two problems:
> - udev rules in mdadm breaks detection of lvm and
> - lvm rules break coldplug.

-- 
You're dead, Jim.
		-- McCoy, "Amok Time", stardate 3372.7