Comment 2 for bug 1461620

Sasha pointed me the a fix for this particular behaviour in between 3.16 and 3.17:

https://lkml.org/lkml/2014/4/10/297

[PATCH] sched: Checking for stop task appearance when balancing happens

Saying that indeed mine previous observation:

"""
--- <NMI exception stack> ---
 #4 [ffff883fd2907d98] multi_cpu_stop+0x64 at ffffffff810f5944
208 } while (curstate != MULTI_STOP_EXIT);
       ---> RIP
RIP 0xffffffff810f5944 <+100>: cmp $0x4,%edx
       ---> CHECKING FOR MULTI_STOP_EXIT
RDX: ffff883fd2907d98 -> does not make any sense
"""

was right due to a stop task being picked by scheduler when it should not.

And this commit is present into:

$ git tag --contains a1d9a3231eac4117cadaf4b6bba5b2902c15a33e
v3.15-rc2
v3.15-rc3
...
v4.1-rc5

So only Trusty is affected.