On Mon, 10 Mar 2014, Dan Williams wrote:

> > The only thing which is a bit concerning is that this doesn't have any
> > throttling mechanism for simultaneous wakeups.  Would this be able to
> > blow up the PSU if used on a machine with a lot of spindles?
> 
> Good point.  The primary benefit is completing userspace resume
> without needlessly waiting for the disk.  For now I think it would be
> enough to have a mutex to maintain one disk at a time.  We can follow
> on later with something more complex to enable a max simultaneous
> spin-up tunable.

Why?  The existing code doesn't have anything like that.

Alan Stern

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