Re: Voyager subarchitecture for 2.5.46

[Pavel Machek <pavel@suse.cz>]

Hi!

> > I believe you need to *store* last value given to userland.
> 
> But that's trivially done: it doesn't even have to be thread-specific, so 
> it can be just a global entry anywhere in the process data
> structures.

> This is just a random sanity check thing, after all. It doesn't have to be 
> system-global or even per-cpu. The only really important thing is that 
> "gettimeofday()" should return monotonically increasing data - and if it 
> doesn't, the vsyscall would have to ask why (sometimes it's fine, if 
> somebody did a settimeofday, but usually it's a sign of trouble).

I believe you need it system-global. If task A tells task B "its
10:30:00" and than task B does gettimeofday and gets "10:29:59", it
will be confused for sure.
								Pavel
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