From: Thomas Gleixner <tglx@linutronix.de>
To: Arnd Bergmann <arnd@arndb.de>
Cc: y2038@lists.linaro.org, Steven Rostedt <rostedt@goodmis.org>,
Ingo Molnar <mingo@redhat.com>,
linux-kernel@vger.kernel.org,
Anna-Maria Gleixner <anna-maria@linutronix.de>,
Frederic Weisbecker <frederic@kernel.org>,
John Stultz <john.stultz@linaro.org>,
Nicolas Pitre <nico@fluxnic.net>
Subject: Re: [PATCH 22/23] [RFC] y2038: itimer: use ktime_t internally
Date: Wed, 13 Nov 2019 23:30:58 +0100 (CET) [thread overview]
Message-ID: <alpine.DEB.2.21.1911132329330.2507@nanos.tec.linutronix.de> (raw)
In-Reply-To: <20191108211323.1806194-13-arnd@arndb.de>
On Fri, 8 Nov 2019, Arnd Bergmann wrote:
> Avoid the intermediate step going from timeval to timespec64 to
> ktime_t and back by using ktime_t throughout the code.
>
> I was going back and forth between the two implementations.
> This patch is optional: if we want it, it could be folded into
> the patch converting to itimerspec64.
>
> On an arm32 build, this version actually produces 10% larger
> code than the timespec64 version, while on x86-64 it's the
> same as before, and the number of source lines stays the
> same as well.
Right. For 32bit without a native 64/32 division this is going to be more
text and I'm not really convinvced that this buys us anything.
Thanks,
tglx
next prev parent reply other threads:[~2019-11-13 22:31 UTC|newest]
Thread overview: 124+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-11-08 21:02 [PATCH 00/23] y2038 cleanups Arnd Bergmann
2019-11-08 21:02 ` Arnd Bergmann
2019-11-08 21:02 ` Arnd Bergmann
2019-11-08 21:02 ` Arnd Bergmann
2019-11-08 21:02 ` Arnd Bergmann
2019-11-08 21:02 ` Arnd Bergmann
2019-11-08 21:02 ` Arnd Bergmann
2019-11-08 21:07 ` [PATCH 01/23] y2038: remove CONFIG_64BIT_TIME Arnd Bergmann
2019-11-20 22:28 ` [Y2038] " Ben Hutchings
2019-11-20 22:58 ` Dmitry Safonov
2019-11-08 21:07 ` [PATCH 02/23] y2038: add __kernel_old_timespec and __kernel_old_time_t Arnd Bergmann
2019-11-09 19:02 ` Deepa Dinamani
2019-11-20 22:30 ` [Y2038] " Ben Hutchings
2019-11-21 14:17 ` Arnd Bergmann
2019-11-08 21:07 ` [PATCH 03/23] y2038: vdso: change timeval to __kernel_old_timeval Arnd Bergmann
2019-11-08 21:07 ` Arnd Bergmann
2019-11-08 21:07 ` Arnd Bergmann
2019-11-08 21:07 ` Arnd Bergmann
2019-11-13 21:56 ` Thomas Gleixner
2019-11-13 21:56 ` Thomas Gleixner
2019-11-13 21:56 ` Thomas Gleixner
2019-11-13 21:56 ` Thomas Gleixner
2019-11-08 21:07 ` [PATCH 04/23] y2038: vdso: change timespec to __kernel_old_timespec Arnd Bergmann
2019-11-08 21:07 ` Arnd Bergmann
2019-11-08 21:07 ` Arnd Bergmann
2019-11-08 21:07 ` [PATCH 05/23] y2038: vdso: change time_t to __kernel_old_time_t Arnd Bergmann
2019-11-08 21:07 ` Arnd Bergmann
2019-11-13 21:57 ` Thomas Gleixner
2019-11-13 21:57 ` Thomas Gleixner
2019-11-08 21:07 ` [PATCH 06/23] y2038: vdso: nds32: open-code timespec_add_ns() Arnd Bergmann
2019-11-08 21:07 ` [PATCH 07/23] y2038: vdso: powerpc: avoid timespec references Arnd Bergmann
2019-11-08 21:07 ` Arnd Bergmann
2019-11-20 22:43 ` [Y2038] " Ben Hutchings
2019-11-20 22:43 ` Ben Hutchings
2019-11-21 14:23 ` Arnd Bergmann
2019-11-21 14:23 ` Arnd Bergmann
2019-11-21 16:25 ` Christophe Leroy
2019-11-21 16:25 ` Christophe Leroy
2019-11-27 11:03 ` Arnd Bergmann
2019-11-27 11:03 ` Arnd Bergmann
2019-12-02 12:55 ` Christophe Leroy
2019-12-02 12:55 ` Christophe Leroy
2019-12-02 14:03 ` Arnd Bergmann
2019-12-02 14:03 ` Arnd Bergmann
2019-11-08 21:07 ` [PATCH 08/23] y2038: ipc: remove __kernel_time_t reference from headers Arnd Bergmann
2019-11-08 21:07 ` Arnd Bergmann
2019-11-08 21:07 ` Arnd Bergmann
2019-11-20 22:49 ` [Y2038] " Ben Hutchings
2019-11-20 22:49 ` Ben Hutchings
2019-11-20 22:49 ` Ben Hutchings
2019-11-21 14:28 ` [Y2038] " Arnd Bergmann
2019-11-21 14:28 ` Arnd Bergmann
2019-11-21 14:28 ` Arnd Bergmann
2019-11-21 14:28 ` Arnd Bergmann
2019-11-08 21:07 ` [PATCH 09/23] y2038: stat: avoid 'time_t' in 'struct stat' Arnd Bergmann
2019-11-08 21:07 ` Arnd Bergmann
2019-11-08 21:07 ` Arnd Bergmann
2019-11-08 21:12 ` [PATCH 10/23] y2038: uapi: change __kernel_time_t to __kernel_old_time_t Arnd Bergmann
2019-11-09 19:03 ` Deepa Dinamani
2019-11-11 12:38 ` Christian Brauner
2019-11-08 21:12 ` [PATCH 11/23] y2038: rusage: use __kernel_old_timeval Arnd Bergmann
2019-11-12 21:09 ` Cyrill Gorcunov
2019-11-13 10:02 ` Arnd Bergmann
2019-11-13 17:22 ` Cyrill Gorcunov
2019-11-14 0:38 ` Christian Brauner
2019-11-14 0:38 ` Christian Brauner
2019-11-14 10:18 ` Arnd Bergmann
2019-11-14 10:23 ` Christian Brauner
2019-11-08 21:12 ` [PATCH 12/23] y2038: syscalls: change remaining timeval to __kernel_old_timeval Arnd Bergmann
2019-11-08 21:12 ` Arnd Bergmann
2019-11-11 12:44 ` Christian Brauner
2019-11-11 12:44 ` Christian Brauner
2019-11-11 12:44 ` Christian Brauner
2019-11-13 22:39 ` Rafael J. Wysocki
2019-11-13 22:39 ` Rafael J. Wysocki
2019-11-08 21:12 ` [PATCH 13/23] y2038: socket: remove timespec reference in timestamping Arnd Bergmann
2019-11-09 19:03 ` Deepa Dinamani
2019-11-11 20:24 ` Arnd Bergmann
2019-11-08 21:12 ` [PATCH 14/23] y2038: make ns_to_compat_timeval use __kernel_old_timeval Arnd Bergmann
2019-11-08 21:12 ` [PATCH 15/23] y2038: elfcore: Use __kernel_old_timeval for process times Arnd Bergmann
2019-11-08 21:12 ` [PATCH 16/23] y2038: timerfd: Use timespec64 internally Arnd Bergmann
2019-11-13 21:49 ` Thomas Gleixner
2019-11-08 21:12 ` [PATCH 17/23] y2038: time: avoid timespec usage in settimeofday() Arnd Bergmann
2019-11-13 21:53 ` Thomas Gleixner
2019-11-14 11:06 ` Arnd Bergmann
2019-11-14 11:06 ` Arnd Bergmann
2019-11-14 14:04 ` Thomas Gleixner
2019-11-14 14:04 ` Thomas Gleixner
2019-11-14 14:35 ` Arnd Bergmann
2019-11-14 23:01 ` Abel Vesa
2019-11-15 7:58 ` Arnd Bergmann
2019-11-15 10:27 ` Rasmus Villemoes
2019-11-15 13:50 ` Arnd Bergmann
2019-11-08 21:12 ` [PATCH 18/23] y2038: itimer: compat handling to itimer.c Arnd Bergmann
2019-11-13 21:54 ` Thomas Gleixner
2019-11-08 21:12 ` [PATCH 19/23] y2038: use compat_{get,set}_itimer on alpha Arnd Bergmann
2019-12-02 13:13 ` Guenter Roeck
2019-11-08 21:12 ` [PATCH 20/23] y2038: move itimer reset into itimer.c Arnd Bergmann
2019-11-09 13:43 ` Ondrej Mosnacek
2019-11-09 21:02 ` Arnd Bergmann
2019-11-09 23:07 ` Ondrej Mosnacek
2019-11-11 10:57 ` Arnd Bergmann
2019-11-14 8:51 ` Ondrej Mosnacek
2019-11-14 10:51 ` Thomas Gleixner
2019-11-13 22:03 ` Thomas Gleixner
2019-11-08 21:12 ` [PATCH 21/23] y2038: itimer: change implementation to timespec64 Arnd Bergmann
2019-11-13 22:28 ` Thomas Gleixner
2019-11-14 2:06 ` Steven Rostedt
2019-11-14 10:48 ` Thomas Gleixner
2019-11-14 10:52 ` Arnd Bergmann
2019-11-14 10:51 ` Arnd Bergmann
2019-11-14 10:57 ` Thomas Gleixner
2019-11-21 16:52 ` [Y2038] " Ben Hutchings
2019-11-25 20:26 ` Arnd Bergmann
2019-11-08 21:12 ` [PATCH 22/23] [RFC] y2038: itimer: use ktime_t internally Arnd Bergmann
2019-11-13 22:30 ` Thomas Gleixner [this message]
2019-11-08 21:12 ` [PATCH 23/23] y2038: allow disabling time32 system calls Arnd Bergmann
2019-11-11 12:31 ` Christian Brauner
2019-11-13 21:40 ` [PATCH 00/23] y2038 cleanups Arnd Bergmann
2019-11-13 21:40 ` Arnd Bergmann
2019-11-13 21:40 ` Arnd Bergmann
2019-11-13 21:40 ` Arnd Bergmann
2019-11-13 21:40 ` Arnd Bergmann
2019-11-13 21:40 ` Arnd Bergmann
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