From: Thomas Gleixner <tglx@linutronix.de>
To: Zack Weinberg <zackw@panix.com>, Cyril Hrubis <chrubis@suse.cz>
Cc: Lukasz Majewski <lukma@denx.de>, Andrei Vagin <avagin@gmail.com>,
GNU C Library <libc-alpha@sourceware.org>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Dmitry Safonov <dima@arista.com>
Subject: Re: [Y2038][time namespaces] Question regarding CLOCK_REALTIME support plans in Linux time namespaces
Date: Fri, 30 Oct 2020 16:10:26 +0100 [thread overview]
Message-ID: <87sg9vn40t.fsf@nanos.tec.linutronix.de> (raw)
In-Reply-To: <CAKCAbMgemuaG61seKMvhjOHdPCEQJRQBiQgzcf_eO=xm2t+KBw@mail.gmail.com>
On Fri, Oct 30 2020 at 10:02, Zack Weinberg wrote:
> On Fri, Oct 30, 2020 at 9:57 AM Cyril Hrubis <chrubis@suse.cz> wrote:
>> > According to patch description [1] and time_namespaces documentation
>> > [2] the CLOCK_REALTIME is not supported (for now?) to avoid complexity
>> > and overhead in the kernel.
> ...
>> > To be more specific - [if this were supported] it would be possible to modify time after time_t
>> > 32 bit overflow (i.e. Y2038 bug) on the process running Y2038
>> > regression tests on the host system (64 bit one). By using Linux time
>> > namespaces the system time will not be affected in any way.
>>
>> And what's exactly wrong with moving the system time forward for a
>> duration of the test?
>
> Interference with other processes on the same computer? Some of us
> *do* like to run the glibc test suite on computers not entirely
> devoted to glibc CI.
That's what virtual machines are for.
next prev parent reply other threads:[~2020-10-30 15:10 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-30 10:02 Lukasz Majewski
2020-10-30 13:08 ` Thomas Gleixner
2020-10-30 15:43 ` Lukasz Majewski
2020-10-30 13:58 ` Cyril Hrubis
2020-10-30 14:02 ` Zack Weinberg
2020-10-30 15:10 ` Thomas Gleixner [this message]
2020-10-30 16:58 ` Carlos O'Donell
2020-10-30 20:06 ` Thomas Gleixner
2020-10-30 22:19 ` Carlos O'Donell
2020-10-31 1:38 ` Thomas Gleixner
2020-11-03 12:43 ` Cyril Hrubis
2020-11-05 17:25 ` Carlos O'Donell
2020-11-07 0:47 ` Thomas Gleixner
2020-11-19 18:37 ` Carlos O'Donell
2020-11-20 0:14 ` Thomas Gleixner
2020-11-25 17:06 ` Petr Špaček
2020-11-25 20:37 ` Carlos O'Donell
2020-11-26 0:17 ` Thomas Gleixner
2020-11-26 3:05 ` Carlos O'Donell
2020-11-26 8:21 ` Andreas Schwab
2020-11-14 10:25 ` Pavel Machek
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