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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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