Re: [RFC] need to improve slot creation/destruction? -- Re: [RFC][PATCH] srcu: Implement call_srcu()

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Avi Kivity <avi@xxxxxxxxxx> wrote:

> On 02/09/2012 04:23 PM, Avi Kivity wrote:
> > > BTW do we really need fast slot creation/destruction?
> >
> > Not really, but it's good to have infrastructure that copes with
> > different workloads.  If the patches keep the code simple I think it's a
> > good thing to have.

My patch is pretty simple.

> To qualify - taking several tens of milliseconds is out of the question
> as some workloads grind to a halt.  But it doesn't need to be incredibly
> fast.

I think the problem is not how long it takes to create/invalidate a slot
but following faults and shadow pages reconstruction.

	Similar to mmu shrinker problem we discussed before.

E.g. users will not expect sudden latency induced by pci hotplug.

	Takuya
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