Hi. On Wed, 2007-04-25 at 15:18 -0700, Linus Torvalds wrote: > > On Wed, 25 Apr 2007, Pavel Machek wrote: > > > > Not the same... but they are still related. "freeze" (for atomic > > snapshot) is actually subset of "suspend"... freeze needs DMAs off and > > saved state, and you need DMAs off and saved state for "suspend". > > THEY HAVE ABSOLUTELY NOTHING IN COMMON! > > Nobody in their right mind thinks that "disable DMA" and "suspend" are > similar operations. > > > So it is actually correct to do "suspend" when you want "freeze"; it > > is just slow. That's why they only differ in parameter these days. > > It is *not* correct to "suspend" when you want "freeze". > > I don't understand how you can even *claim* something like that. > > Here's a trivial example: > - SCSI disk > > Tell me, what does "suspend" do, and what does "freeze" (snapshot) do? > > And name *one* thing that have in common.
Set/reset the scsi transaction id thingy? Hibernation didn't work with SCSI for a long time precisely because that support was missing. Don't get me wrong, I agree on the whole - Suspend2 worked fine on the whole under 2.4 without a driver model. But they do have a bit in common. Regards, Nigel
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