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SubjectRe: suspend2 merge (was Re: [Suspend2-devel] Re: CFS and suspend2: hang in atomic copy)
Linus Torvalds wrote:
> Tell me, what does "suspend" do, and what does "freeze" (snapshot) do?
> And name *one* thing that have in common.
> I'll tell you: Nada. Zero. Zilch. Nothing.
> "Freeze" for a disk is a total no-op. There is no DMA, there is no
> nothing. In contrast, "suspend" for a disk is a totally valid operation.

Freeze is a subset of suspend, isn't it? (It might be an empty subset
in some cases.)

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