[Bug 200992] proccess won't die in thread_suspend_switch

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=200992

Antonio Nikishaev <me.freebsd at lelf.lu> changed:

           What    |Removed                     |Added
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                 CC|                            |me.freebsd at lelf.lu

--- Comment #25 from Antonio Nikishaev <me.freebsd at lelf.lu> ---
This bug is rather major.

I'm seeing the same issue with DigitalOcean instances (10.2-RELEASE(!)).
Riak2 nodes randomly hang up every several days.


% uname -a
FreeBSD riak-freebsd-8gb-nyc3-01 10.2-RELEASE FreeBSD 10.2-RELEASE #0 r286666:
Wed Aug 12 15:26:37 UTC 2015    
root at releng1.nyi.freebsd.org:/usr/obj/usr/src/sys/GENERIC  amd64

% sudo procstat -k 76975
  PID    TID COMM             TDNAME           KSTACK                       
76975 101201 beam.smp         -                mi_switch sleepq_timedwait
_cv_timedwait_sbt amd64_syscall Xfast_syscall 
76975 101317 beam.smp         -                mi_switch thread_suspend_switch
thread_single exit1 sigexit postsig ast doreti_ast 

% ps -auxw -p 76975
USER   PID %CPU %MEM     VSZ     RSS TT  STAT STARTED       TIME COMMAND
riak 76975  0.0 72.1 7524240 6030480  -  T<s  Tue08PM 1707:20.72
/usr/local/lib/riak/erts-5.10.3/bin/beam.smp -scl false -sfwi 500 -P 2560

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