Messages in this thread | | | Date | Tue, 24 Sep 2002 11:37:38 +0200 | From | Anders Fugmann <> | Subject | Re: Q: Scheduler and need_resched |
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Anders Fugmann wrote: > Hi. > > I got a small question of what happens codevice when the quantum of a > task is expired (counter == 0 -> need_resched == 1). Of cource schedule > is invoked somehow, but from where? How is the "flow". I see from where > do_timer is called, and that it schedules a BH, but then I'm stuck. > > Any pointer appriciated. > Anders Fugmann
Solved. By the help of the kernel newbies pages, I was pointed to the page http://kernelnewbies.org/wiki/moin.cgi/Karthick, which pointed at the label '_ret_with_reschedule' in entry.S.
This piece of assembler is called after each interrupt, and tests the need_resched flag to see is scheduling is nessesary.
Anyway, thanks for your time. Anders Fugmann
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