From: Miroslav Lichvar <mlichvar@redhat.com>
To: Arnd Bergmann <arnd@arndb.de>
Cc: linux-kernel@vger.kernel.org, y2038@lists.linaro.org,
John Stultz <john.stultz@linaro.org>,
Thomas Gleixner <tglx@linutronix.de>,
Prarit Bhargava <prarit@redhat.com>,
Richard Cochran <richardcochran@gmail.com>
Subject: Re: [PATCH] timekeeping: Limit system time to prevent 32-bit time_t overflow
Date: Thu, 8 Oct 2015 08:23:44 +0200 [thread overview]
Message-ID: <20151008062344.GO5778@localhost> (raw)
In-Reply-To: <5753784.UXVo9jVTVp@wuerfel>
On Wed, Oct 07, 2015 at 05:10:34PM +0200, Arnd Bergmann wrote:
> On Wednesday 07 October 2015 16:23:44 Miroslav Lichvar wrote:
> > Without the limit added by this patch make will go nuts just one week
> > later when the 32-bit time_t overflows to Dec 13 1901 and the files
> > will appear as 136 years in the future. How is that better?
>
> Not better or worse at all, that was my point. The time is still
> wrong either way, whether you step back by a week or 136 years.
The difference is that with the one-week step the kernel and userspace
still agree on the current time and it is always valid from the kernel
point of view, absolute timers can be set, etc.
--
Miroslav Lichvar
next prev parent reply other threads:[~2015-10-08 6:23 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-10-07 13:22 [PATCH] timekeeping: Limit system time to prevent 32-bit time_t overflow Miroslav Lichvar
2015-10-07 13:47 ` Arnd Bergmann
2015-10-07 14:23 ` Miroslav Lichvar
2015-10-07 15:10 ` Arnd Bergmann
2015-10-08 6:23 ` Miroslav Lichvar [this message]
2015-10-08 8:52 ` Arnd Bergmann
2015-10-08 9:39 ` Miroslav Lichvar
2015-10-09 9:46 ` Thomas Gleixner
2015-10-09 10:34 ` Miroslav Lichvar
2015-10-09 10:38 ` Thomas Gleixner
2015-10-09 10:47 ` Miroslav Lichvar
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