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A job running in the foreground can be stopped by typing the suspend character . This sends the "terminal stop" signal (SIGTSTP) to the process group. By default, SIGTSTP causes processes receiving it to stop, and control is returned to the shell. However, a process can register a signal handler for or ignore SIGTSTP.
To enable swsusp, the following should be selected during kernel configuration: Power management options → <*>Power management support (CONFIG_PM) Power management options → <*>Software Suspend (CONFIG_SOFTWARE_SUSPEND) Power management options → [/dev/resume_partition]Default resume partition (CONFIG_PM_STD_PARTITION)
A process can define how to handle incoming POSIX signals. If a process does not define a behaviour for a signal, then the default handler for that signal is being used. The table below lists some default actions for POSIX-compliant UNIX systems, such as FreeBSD, OpenBSD and Linux.
For example, the mode recovery after a suspend/resume process simplifies a lot by being managed by the kernel itself, and incidentally improves security (no more user space tools requiring root permissions). The kernel also allows the hotplug of new display devices easily, solving a longstanding problem. [45]
the execution of a coroutine is suspended as control leaves it, only to carry on where it left off when control re-enters the coroutine at some later stage. Besides that, a coroutine implementation has 3 features: the control-transfer mechanism. Asymmetric coroutines usually provide keywords like yield and resume. Programmers cannot freely ...
Process creation in Windows is done through the CreateProcessA() system call. A new process runs in the security context of the calling process, but otherwise runs independently of the calling process. Methods exist to alter the security context in which a new processes runs. New processes are assigned identifiers by which they can be accessed.
The suspended process can then be resumed in foreground (interactive) mode, or be made to resume execution in background mode, or be terminated. When entered by a user at their computer terminal , the currently running foreground process is sent a "terminal stop" ( SIGTSTP ) signal, which generally causes the process to suspend its execution.
Process management provides policies and mechanisms for effective and efficient sharing of resources between distributed processes. These policies and mechanisms support operations involving the allocation and de-allocation of processes and ports to processors, as well as mechanisms to run, suspend, migrate, halt, or resume process execution.