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Full Discussion: server hang problem
Operating Systems Linux Red Hat server hang problem Post 302345900 by laxmikant on Thursday 20th of August 2009 01:17:21 PM
Old 08-20-2009
server hang problem

Hello everybody..

I have RHEL-4 Server with kernel - Linux 2.6.9-78.0.1.ELlargesmp x86_64
It is used for Development usage..
That server got hang and so reboot was required, when checked log file i found following messages,

kernel: warning: many lost ticks.
kernel: Your time source seems to be instable or some driver is hogging interupts
kernel: rip __do_softirq+0x4d/0xd0
kernel: Falling back to HPET

Can anybody help me out to understand what are these messages?
What action need to be taken to avoid these?
I would appreciate your help..
Thanks.
 

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REBOOT(8)						      System Manager's Manual							 REBOOT(8)

NAME
reboot - reboot the system immediately SYNOPSIS
reboot [-f] DESCRIPTION
Reboot can be used to reboot the system after installing a new kernel. It does not inform the users, but does log it's actions in /usr/adm/wtmp and /usr/adm/authlog. The system is then rebooted with the reboot(2) systemcall. If the -f flag is not given then all processes are sent terminate signals to give them a chance to die peacefully before the reboot() call. If the wtmp file exists, reboot logs itself as if it were a shutdown. This is done to prevent last(1) from talking about system-crashes. Reboot is registered as is in the authlog file. Reboot can only be executed by the super-user. Any other caller will be refused, either by reboot(8) or by reboot(2). SEE ALSO
reboot(2), shutdown(8), halt(8), boot(8). BUGS
The error message's given by reboot are not always useful. There are several routines that can fail, but which are not fatal for the pro- gram. AUTHOR
Edvard Tuinder (v892231@si.hhs.NL) REBOOT(8)
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