From: Michael Gilbert <mgilbert@debian.org>
To: linux-kernel@vger.kernel.org
Subject: Re: [PATCH] timekeeping: handle epoch roll-over (2038) on 32-bit systems
Date: Sat, 24 Aug 2013 23:47:32 +0000 (UTC) [thread overview]
Message-ID: <loom.20130825T005015-983@post.gmane.org> (raw)
In-Reply-To: <alpine.LFD.2.02.1306072308040.24812@ionos>
Thomas Gleixner writes:
> That time value should be 64bit, also people might argue, that we are
> creating a new issue for the year 2554, i.e 541 years from now. I
> don't think we need to worry about that really. We have to leave our
> grand-grand-grand..grandchildren (~20 generations from now) a few
> unsolved problems!
Or at the measly cost of 8 additional bytes, solve the problem well and good
for the entirety of the human race :)
128 (unsigned) bits defers the rollover problem for 1e-9*(2**128)/3600/24/365
= 1e22 years, or 770 billion times longer than the current age of the
universe.
That of course hedges on a 128-bit integer C standard within the next 25
years ;)
Best wishes,
Mike
next prev parent reply other threads:[~2013-08-25 0:10 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-06-03 13:34 Tobias Waldekranz
2013-06-03 14:34 ` Thomas Gleixner
2013-06-03 19:04 ` John Stultz
2013-06-07 21:53 ` Thomas Gleixner
2013-06-20 12:34 ` Ingo Molnar
2013-08-24 23:47 ` Michael Gilbert [this message]
2013-06-04 6:59 ` Tobias Waldekranz
2013-06-07 20:57 ` Thomas Gleixner
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