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Top Forums UNIX for Dummies Questions & Answers whats the difference between zombie orpha and defunct processes Post 302181530 by Perderabo on Thursday 3rd of April 2008 08:36:04 AM
Old 04-03-2008
Quote:
Originally Posted by pbsrinivas
zombie and defunct are one and the same???

Not exactly, the ps command checks to see if a process is in the zombie state. If so, it will display <defunct> as the name and as the command line of the process. But the author of ps could have picked "nonesuch" or "tilt" or "not at home" just as easily. The kernel knows what a zombie is, but it never heard of "<defunct>".
 

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TAPSET::KPROCESS(3stap) 												   TAPSET::KPROCESS(3stap)

NAME
tapset::kprocess - systemtap kernel process probe points DESCRIPTION
This family of probe points is used to probe the kernel's process activities. It contains the following probe points: kprocess.create Fires whenever a new process is successfully created, either as a result of one of the fork syscall variants, or a new kernel thread. Arguments: task a handle to the newly created process new_pid pid of the newly created process kprocess.start Fires immediately before a new process begins execution. Arguments: N/A kprocess.exec Fires whenever a process attempts to exec to a new program Arguments: filename the path to the new executable kprocess.exec_complete Fires at the completion of an exec call Arguments: errno the error number resulting from the exec success a boolean indicating whether the exec was successful kprocess.exit Fires when a process terminates. This will always be followed by a kprocess.release, though the latter may be delayed if the process waits in a zombie state. Arguments: code the exit code of the process kprocess.release Fires when a process is released from the kernel. This always follows a kprocess.exit, though it may be delayed somewhat if the process waits in a zombie state. Arguments: task a task handle to the process being released pid pid of the process being released SEE ALSO
stap(1), stapprobes(3stap) Intel, IBM TAPSET::KPROCESS(3stap)
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