With write-intent bitmaps our arrays, if dirty, are now reconstructed
before anyone logs in.  That avoided the conflict with 'zeitgeist'.

The fast recovery speed also suited our other requirements better,
despite the trade-offs involved.

Synchronization on this production system takes several hours.
Unfortunately I am not in a position to trigger reconstruction at this

If no one else reports a similar problem, please feel free to ignore
this filing.

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  zeitgeist-daemon degrades mdraid recovery

Status in Zeitgeist Framework:

Bug description:
  Upon login, the 'zeitgeist-daemon' interferes with md raid recovery.
  Changing process priorities has no effect.  Array reconstruction only
  takes place at a reasonable speed after one issues 'kill -STOP
  $zeitgeist-daemon-pid', followed by a 'kill -CONT $pid' when done.

  In my case reconstruction speed degrades to 1MB/s, which takes 4 days
  on a 320GB disk, from 50MB/s or 100 minutes with 'zeitgeist-daemon'
  suspended.  Given that there is no protection from drive failure
  during reconstruction that task should be given priority.

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