Re: [PATCH] HZ change for ix86

Alan Cox (alan@lxorguk.ukuu.org.uk)
Sun, 10 Jan 1999 03:27:56 +0000 (GMT)

> The idea of switching and rescheduling in Linux upon every
> system call (basically trivial, just schedule() before the request) just
> might be worth a hack. This is what "they" did in the days of slow CPUs
> and 100s of interactive users.

Its not needed. Linux already gives up the CPU if you return from a system
call and your timeslice has expired. The timer code sets
current->need_resched=1

The syscall return path checks it

Alan

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