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Asked: 2026-06-13T14:51:21+00:00

I have a Linux kernel module that runs every 10 seconds and scans whether

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I have a Linux kernel module that runs every 10 seconds and scans whether there are any resource-hogging processes. I then need to suspend them for a minute (i.e. six loops through the code) and let them run again afterwards. I have already written the code to check for the condition, and have all the appropriate task_struct pointers.

The question is, how do I suspend a task, given its task_struct pointer? And later on, how do I resume that task?

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1 Answer

  1. Editorial Team

    You could suspend the process by sending it STOP signal, then resume it by sending it a CONT signal; perhaps via kill_pid(task_pid(task_struct), SIGSTOP, 1) and kill_pid(task_pid(task_struct), SIGCONT, 1) for example.

    That approach is not perfect. For example, another process can keep such a process running by sending it CONT signals, unless you also block CONT signals during the time-out period.

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