Messages in this thread | | | Date | Sun, 10 Nov 2002 20:42:04 +0100 | From | Pavel Machek <> | Subject | Re: Voyager subarchitecture for 2.5.46 |
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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 -- Casualities in World Trade Center: ~3k dead inside the building, cryptography in U.S.A. and free speech in Czech Republic. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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