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To: linux-kernel@vger.kernel.org
Subject: Re: Voyager subarchitecture for 2.5.46
References: <20021110191822.GA1237@elf.ucw.cz>
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	<20021110194204.GF3068@atrey.karlin.mff.cuni.cz>
From: Sean Neakums <sneakums@zork.net>
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Date: Sun, 10 Nov 2002 20:02:00 +0000
In-Reply-To: <20021110194204.GF3068@atrey.karlin.mff.cuni.cz> (Pavel
 Machek's message of "Sun, 10 Nov 2002 20:42:04 +0100")
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commence  Pavel Machek quotation:

>> 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.

Hence the requirement that it be monotonically increasing.

-- 
 /                          |
[|] Sean Neakums            |  Questions are a burden to others;
[|] <sneakums@zork.net>     |      answers a prison for oneself.
 \                          |
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