Re: [PATCH RFC 2/2] kvm: Be courteous to other VMs in overcommittedscenario in PLE handler

[Peter Zijlstra]

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.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/