Messages in this thread | | | Subject | Re: [PATCH RFC 2/2] kvm: Be courteous to other VMs in overcommitted scenario in PLE handler | From | Peter Zijlstra <> | Date | Mon, 24 Sep 2012 17:34:21 +0200 |
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On Mon, 2012-09-24 at 17:26 +0200, Avi Kivity wrote: > I think this is a no-op these (CFS) days. To get schedule() to do > anything, you need to wake up a task, or let time pass, or block. > Otherwise it will see that nothing has changed and as far as it's > concerned you're still the best task to be running (otherwise it > wouldn't have picked you in the first place).
Time could have passed enough before calling this that there's now a different/more eligible task around to schedule.
Esp. for a !PREEMPT kernel this is could be significant.
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