On Mon, Sep 28, 2015 at 3:14 PM, Carlos E. R.
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Hi,
it has happened to me a few times, each time I doing different things as far as I can remember. Suddenly a process hangs. CPU is about iddle, disk is iddling. But some processes do not start. A simple "ps afx" never finishes, and ^C it doesn't work. Subsequently, a reboot also hangs, does nothing. I have to hit the power button hard, more than 4 seconds.
Most likely process is waiting uniterruptibly on completion of some kernel activity or on some resource. It can be "work as designed" - e.g. NFS hard mount waiting for a server to respond. Or it could be a bug. In general the only way to get some information is to use SysRq to trigger stack print (SysRq-t and -l) and/or panic to generate dump, although the latter needs someone to actually analyze it. If it happens often, you could setup netconsole so that you can capture console output of stack ptint. This would be good starting point for a bug report. Locking information (SysRq-d) may be of interest too. -- To unsubscribe, e-mail: opensuse+unsubscribe@opensuse.org To contact the owner, e-mail: opensuse+owner@opensuse.org