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Old 11-26-2007, 02:16 PM   #1
btap_644
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Deadlock management in linux


hey guys. I've got an assignment to do on deadlock management in linux so could someone give me some info
thanks
 
Old 11-27-2007, 07:58 AM   #2
senramesh
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hi,

If your machine is in remote location and you want the machine to get restarted automatically when the machine hits kernel panic. Then add this line to the /etc/sysctl.conf. After 10 sec delay m/c will be rebooted.

kernel.panic = 10

Enable sysrq keys

By default it is not enabled on many Linux distributions. Add or modify following line (as soon as new Linux system installed) /etc/systctl.conf:
kernel.sysrq=1

Save and close the file and reboot system to take effect
How do I use the magic SysRq keys in emergency?

You need to use following key combination in order to reboot/halt/sync file system etc:
ALT+SysRq+COMMAND-KEY

The ‘SysRq’ key is also known as the ‘Print Screen’ key. COMMAND-KEY can be any one of the following (all keys need to hit simultaneously) :

* ‘b’ : Will immediately reboot the system without syncing or unmounting your disks.
* ‘o’ : Will shutdown your system off (if configured and supported).
* ’s’: Will attempt to sync all mounted filesystems.
* ‘u’ : Will attempt to remount all mounted filesystems read-only.
* ‘e’ : Send a SIGTERM to all processes, except for init.
* ‘h’: Show help, indeed this the one you need to remember.

So whey you need to tell your Linux computer to reboot or when your X server is crashed or you don’t see anything going across the screen then just press:

ALT+SysRQ+s : (Press and hold down ALT, then SysRQ (Print Screen) key and press ’s’) -Will try to syn all mounted system

ALT+SysRQ+r : (Press and hold down ALT, then SysRQ (Print Screen) key and press ‘r’) -Will reboot the system.

If you wish to shutdown the system instead of reboot then press following key combination:
ALT+SysRQ+o
 
Old 02-01-2011, 03:28 PM   #3
sidra_malik
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Angry deadlock

Quote:
Originally Posted by btap_644 View Post
hey guys. I've got an assignment to do on deadlock management in linux so could someone give me some info
thanks
i didnt got any data on deadlock management........;P
 
Old 02-07-2011, 05:46 PM   #4
jschiwal
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This thread is 3 years old. Maybe you want to ask a question by posting a new thread, but please do a better job of explaining the problem.
 
  


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