Messages in this thread | | | Subject | Re: scheduler ignores need_resched flag in 2.2.x and 2.3.x? | From | Andi Kleen <> | Date | 21 Mar 2000 06:09:25 +0100 |
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lk@tantalophile.demon.co.uk (Jamie Lokier) writes:
> Jun Sun wrote: > > First of all, I think this is must-fix bug. (Any arguments here?) > > There are a few other scenarious where need_resched is missed, including > the last few instructions after ret_from_syscall. And it really does > happen there. I think it's a must-fix too, but the fact that neither my > nor Ingo's patch made it in suggests Linus thinks otherwise.
Looks like the easiest way to fix such races would be to move need_resched back to a global variable (possible in an array indexed per CPU). Earlier Linux kernels (<2.0) had it this way, I'm not sure why it was changed.
-Andi
-- This is like TV. I don't like TV.
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