High load average on frieza without user visible activity

[Jean-Baptiste Lallement]

current build number: 76
device name: frieza
channel: ubuntu-touch/rc-proposed/bq-aquaris-pd.en

Top shows a high load average without visible user activity. The output below was done with the device connected to a charger and display off.

top - 10:00:34 up 13:00, 2 users, load average: 12,43, 11,52, 11,59
Tasks: 264 total, 7 running, 256 sleeping, 1 stopped, 0 zombie
%Cpu(s): 6,3 us, 23,2 sy, 0,0 ni, 70,1 id, 0,4 wa, 0,0 hi, 0,0 si, 0,0 st
KiB Mem: 2009208 total, 925908 used, 1083300 free, 1620 buffers
KiB Swap: 524284 total, 0 used, 524284 free. 114352 cached Mem

  PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
 6677 phablet 20 0 6128 1100 748 R 11,3 0,1 0:00.05 top
    1 root 20 0 3900 2372 1080 S 0,0 0,1 0:05.38 init
    2 root 20 0 0 0 0 S 0,0 0,0 0:00.00 kthreadd
    3 root 20 0 0 0 0 S 0,0 0,0 0:03.39 ksoftirqd/0
    5 root 0 -20 0 0 0 S 0,0 0,0 0:00.00 kworker/0:0H
    7 root -99 0 0 0 0 S 0,0 0,0 0:05.74 migration/0
    8 root 20 0 0 0 0 S 0,0 0,0 0:04.04 rcu_preempt
    9 root 20 0 0 0 0 S 0,0 0,0 0:00.00 rcu_bh
   10 root 20 0 0 0 0 S 0,0 0,0 0:00.71 rcu_sched
   11 root -99 0 0 0 0 R 0,0 0,0 0:05.88 migration/1
   12 root 20 0 0 0 0 R 0,0 0,0 0:02.05 ksoftirqd/1
   14 root 0 -20 0 0 0 S 0,0 0,0 0:00.31 kworker/1:0H
   15 root -99 0 0 0 0 R 0,0 0,0 0:00.03 migration/2