Re: user switching criterion proposal

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On Thu, May 7, 2020 at 8:48 AM Lukas Ruzicka <lruzicka@xxxxxxxxxx> wrote:
Hello,
I agree, that user switching as described in this proposal is something that should work really well, because it can obviously change the user experience in some cases.
I only have a problem with the following statement:

The switching mechanism must correctly attempt the requested operation.

As I understand it, it might be enough if the operation is "attempted" only? This sounds vague and weak to me. I think we need something stronger here, like "it performs the requested operation" or something similar.

It's similar to e.g. shutdown criterion [1] where the "shutdown mechanism must correctly request a shutdown from the system firmware" or storage resize criterion [2] where "installer mechanism for resizing storage volumes must correctly attempt the requested operation".
The important word in all these cases is "correctly". It implies that the software part, the calling part, must be implemented correctly. But because it deals with hardware and low level firmware and drivers, it admits that that part might not work correctly in all configurations. Which is then expanded in the next sentence.

I simply got my inspiration from our other criteria when writing this one. It doesn't have to stay this way. But I think the "correctly attempt/request" wording is quite fitting here and it's not weak (at least not towards our software stack, which is the part which we can control reasonably well).


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