Re: [PATCH] Make highly niced processes run only when idle

From: Robert Love (
Date: Sun Dec 09 2001 - 19:30:29 EST

On Sun, 2001-12-09 at 18:46, Benjamin LaHaise wrote:

> Actually, yes: in entry.S the ret_from_syscall path which calls schedule
> can be changed to pass a parameter indicating it is returning to userspace
> afterwards which would let schedule know the bump is not needed.

Hmm, what if we only boosted it based on something like this:

        if (p->policy == SCHED_IDLE) {
                weight = p->counter;
                if (p->lock_depth >= 0 || signal_pending(p))
                        /* boost somehow ... */

(I'm writing the patch now :>)

Would it still make sense to only boost it in kernel space ?

        Robert Love

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