Re: [PATCH v3] sched/fair: Add advisory flag for borrowing a timeslice (was: Pre-emption control for userspace)

[Davidlohr Bueso]

On Mon, 2014-11-24 at 21:03 -0500, Rik van Riel wrote:
> I can see this "solution" help mostly with userspace spinlocks,
> which are relics of a past era that need to die. There is no
> way userspace spinlocks will not fail miserably on virtual
> machines, and it is time to get rid of them.

No, not really. Spinlocks are still very useful on bare metal.
Virtualization is not the only thing out there.

Thanks,
Davidlohr

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