Re: Task Switching in Linux

[Rick Hohensee]

Jaswinder Singh wrote:
>
> In Linux , If we assume that there are only 2 tasks A and B and both are
> equal , this is correct or not :-
>
> TASK A -> schedule -> switch_to -> TASK B -> schedule -> switch_to ->
> schedule -> switch_to -> TASK A.
>

If you mean "->" as "specifically calls" then that looks like cooperative
multi-tasking, which is what kernel threads AND the Linux userland
scheduler do. If an in-kernel thread doesn't call schedule, it keeps the
CPU. See the H3rL stuff in ftp://linux01.gwdg.de/pub/cLIeNUX/interim

Rick Hohensee
:; cLIeNUX /dev/tty11  21:00:45   /
:;d -d */
Cintpos/     boot/        device/      incoming/    owner/       temp/
Debian/      command/     floppy/      log/         source/
Linux/       configure/   guest/       lost+found/  subroutine/
NetBSD/      dev/         help/        mounts/      suite/