EmbLogic » zombie https://www.emblogic.com/blog Embedded System and ARM Training Tue, 03 Mar 2020 13:00:06 +0000 en-US hourly 1 http://wordpress.org/?v=3.9.1 Zombie or Defunct Process https://www.emblogic.com/blog/01/zombie-or-defunct-process/ https://www.emblogic.com/blog/01/zombie-or-defunct-process/#comments Fri, 15 Jan 2016 10:37:43 +0000 http://www.emblogic.com/blog/?p=13163 Continue reading →]]> Zombie or Defunct Process
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If a child proces tries to teminate,its association with parent remains until the parent terminates normally or calls wait.
- The child process entry in process table is therfore not freed up immediately.
- Althougth the process is no longer active, the child remains still in system because its exit code is needed to be stored in case of parent subsequently

calls wait.
- The process becomes defunct or zombie process.
- It is shown by ‘Z’ or ‘Z+’ in process table.

- If the parent is terminated abnormally, the zombie child process will not be terminated (which is not good).

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