This is the mail archive of the
libc-alpha@sourceware.org
mailing list for the glibc project.
Re: New kernel interface for sys_tz and timewarp?
- From: hpa at zytor dot com
- To: "Theodore Y. Ts'o" <tytso at mit dot edu>, Arnd Bergmann <arnd at arndb dot de>
- Cc: David Laight <David dot Laight at aculab dot com>, Linus Torvalds <torvalds at linux-foundation dot org>, Linux Kernel Mailing List <linux-kernel at vger dot kernel dot org>, Thomas Gleixner <tglx at linutronix dot de>, John Stultz <john dot stultz at linaro dot org>, Alexandre Belloni <alexandre dot belloni at bootlin dot com>, Stephen Boyd <sboyd at kernel dot org>, Florian Weimer <fweimer at redhat dot com>, Palmer Dabbelt <palmer at dabbelt dot com>, Alistair Francis <alistair dot francis at wdc dot com>, GNU C Library <libc-alpha at sourceware dot org>, Karel Zak <kzak at redhat dot com>, Lennart Poettering <lennart at poettering dot net>, OGAWA Hirofumi <hirofumi at mail dot parknet dot co dot jp>
- Date: Thu, 15 Aug 2019 08:24:09 -0700
- Subject: Re: New kernel interface for sys_tz and timewarp?
- Dkim-filter: OpenDKIM Filter v2.11.0 mail.zytor.com x7FFo2e82401331
- References: <CAK8P3a0VxM1BkjY1D2FfHi6L-ho_NH3v3+gBu45EfpjLF5NU5w@mail.gmail.com> <CAHk-=wiO2CWONDBud4nxoPgUJN1JEewFWhHa5wAqY8G5rrTXRQ@mail.gmail.com> <20190814000622.GB20365@mit.edu> <342565604d704b6ebaf2e9ec28d3e109@AcuMS.aculab.com> <0089C4CC-DD85-48A1-869B-A9D71852BEC7@zytor.com> <CAK8P3a0VQ1F5xnRNmfeg-rAWbKb64u_8xfQjFNahNRoAHTMJ3g@mail.gmail.com> <20190815150530.GA18727@mit.edu>
On August 15, 2019 8:05:30 AM PDT, "Theodore Y. Ts'o" <tytso@mit.edu> wrote:
>On Thu, Aug 15, 2019 at 03:22:45PM +0200, Arnd Bergmann wrote:
>> If 64-bit Windows relies on a working EFI RTC implementation, we
>could
>> decide to leave the driver enabled on 64-bit and only disable it for
>> 32-bit EFI. That way, future distros would no longer have to worry
>about
>> the localtime hack, at least the ones that have dropped support for
>> 32-bit x86 kernels.
>
>... and who have also dropped support for legacy (non-UEFI) 64-bit
>boot. Keep in mind that even for distributions which may install with
>UEFI by default, if people have been upgrading from (for example)
>Debian Jessie to Stretch to Buster, they may still be using non-UEFI
>boot. This might be especially true on small Linode servers (such as,
>for example, the one which is currently running my mail smarthost....)
>
> - Ted
There is also the ACPI TAD device, which can be used to expose this through ACPI. We might also be able to request that the ACPI information for the RTC be augmented with a CMOS timezone location.
--
Sent from my Android device with K-9 Mail. Please excuse my brevity.