I haven't experienced this issue on recent 14.09 images. However, now I
have a proces called "init" (not the one with PID 1) that takes 200 megs
of RAM and constantly about 15% of CPU:

top - 22:10:19 up 2 days, 11:13,  2 users,  load average: 2,88, 3,48, 3,44
Tasks: 304 total,   3 running, 291 sleeping,  10 stopped,   0 zombie
%Cpu(s): 37,1 us, 62,4 sy,  0,0 ni,  0,0 id,  0,0 wa,  0,0 hi,  0,5 si,  0,0 st
KiB Mem:   1878572 total,  1811868 used,    66704 free,   143000 buffers
KiB Swap:    32764 total,     1696 used,    31068 free.   477768 cached Mem

  PID USER      PR  NI    VIRT    RES    SHR S  %CPU %MEM     TIME+ COMMAND     
                                                                                
                    
 1453 phablet   20   0  215936 210984   1216 R  14,5 11,2 282:48.96 init        
                                                                                
                    
  766 message+  20   0   18100  15588    756 S   4,2  0,8 139:55.43 dbus-daemon 
                                                                                
                    
 2765 phablet   20   0  552016 158796  59224 R   3,9  8,5  87:28.12 unity8      
                                                                                
                    
 1139 root       0 -20    7572    552    400 S   2,3  0,0  67:09.50 mpdecision  
                                                                                
                    
 1574 phablet   20   0    5344   2428    748 S   2,3  0,1  69:27.50 dbus-daemon 
                                                                                
                    
  988 root      20   0    9744   1260    796 S   1,9  0,1  47:23.86 
systemd-udevd                                                                   
                                
    1 root      20   0    4412   2884   1112 S   1,3  0,2  31:58.40 init        
                                                                                
                    
 1691 phablet   20   0    5608    448    260 S   1,3  0,0  35:44.75 
upstart-dbus-br                                                                 
                                
26167 phablet   20   0    6492   1396    860 R   1,3  0,1   0:00.42 top

This time, I have strace installed and recorded a few seconds of its
output.

Do you think this is related, or should I open a new bug for this?

** Attachment added: "strace output of process "init", PID 1453"
   
https://bugs.launchpad.net/ubuntu/+source/upstart/+bug/1281061/+attachment/4266339/+files/init.strace.txt.gz

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Title:
  initctl eating cpu on mako #181

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