This happens frequently when attempting to create a snapshot:

# lvcreate -s -L4G /dev/systemvg/edgy_chroot -n edgy-mongoose2
  LV systemvg/edgy-mongoose2 in use: not deactivating
  Couldn't deactivate new snapshot.

And then evms_activate runs like crazy and then lvm following that,
hammering my drives:

root     15334  0.0  0.0  10304   648 ?        S<   17:41   0:00 
/lib/udev/watershed /sbin/evms_activate
root     15335  0.0  0.0  10300   636 ?        S<   17:41   0:00 
/lib/udev/watershed /sbin/evms_activate
root     15354  1.8  0.1  82364  4528 ?        D<l  17:41   0:00 
/sbin/evms_activate

...later...

root     15416  0.0  0.0  10304   644 ?        S<   17:41   0:00 
/lib/udev/watershed /sbin/lvm vgck
root     15418  0.0  0.0  13312  1576 ?        D<   17:41   0:00 /sbin/lvm vgck
root     15422  0.0  0.0  10304   640 ?        S<   17:41   0:00 
/lib/udev/watershed /sbin/lvm vgck

I'm assuming some new race condition has been introduced.

Also, it doesn't seem sensible to run vgck every time a lvm operation
happens.  This is pretty disk intensive.

-- 
[feisty] failures when opening snapshots
https://launchpad.net/bugs/84672

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