[RFC][PATCH] Generic Timekeeping Rework (cumulative - bz'ed) (v. B6)

[john stultz <johnstul@us.ibm.com>]

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On Thu, 2005-09-29 at 17:40 -0700, john stultz wrote:
> All,
> 	Here is the cumulative patch for my generic timekeeping rework (v. B6).
> Individual broken out patches to follow. This patch provides the NTP
> changes, the timesource abstraction, the core timekeeping code as well
> as the code to convert the i386 arch.
> 
> New in this release:
> o Minimized the NTP changes needed to better facilitate discussion
> o Maintains both timespec and nsec_t timekeeping values to improve
> performance.
> o Implemented a first pass at Roman's idea for fixed interval time
> accounting in the interrupt hot-path. More optimizations are likely to
> follow, but this hopefully illustrates some improvement and forward
> progress.
> o Added hooks to allow unified code between systems with continuous
> hardware timesource and those that require tick/offset time accounting
> without the performance penalty the old method would cause.
> 
> Notes:
> Some of these changes have affected the codes readability, but hopefully
> this will be resolved in future versions.
> 
> Since its been awhile since the last release, I'd not be surprised if a
> few regressions have shown up. I've tested this on my laptop, but not
> very widely. Any problem reports would be greatly appreciated. 
> 
> This patch should apply against Linus' git tree from today.
> 
> Please let me know if you have any comments or feedback.
> 
> thanks
> -john
> 
> 	
>  arch/i386/kernel/timers/Makefile              |    9 
>  arch/i386/kernel/timers/common.c              |  172 -------
>  arch/i386/kernel/timers/timer.c               |   75 ---
>  arch/i386/kernel/timers/timer_cyclone.c       |  259 -----------
>  arch/i386/kernel/timers/timer_hpet.c          |  212 ---------
>  arch/i386/kernel/timers/timer_none.c          |   39 -
>  arch/i386/kernel/timers/timer_pit.c           |  176 -------
>  arch/i386/kernel/timers/timer_pm.c            |  268 -----------
>  arch/i386/kernel/timers/timer_tsc.c           |  595 --------------------------
>  b/Documentation/kernel-parameters.txt         |    7 
>  b/arch/i386/Kconfig                           |    4 
>  b/arch/i386/kernel/Makefile                   |    3 
>  b/arch/i386/kernel/acpi/boot.c                |   14 
>  b/arch/i386/kernel/i8259.c                    |   40 +
>  b/arch/i386/kernel/setup.c                    |    1 
>  b/arch/i386/kernel/time.c                     |  220 +--------
>  b/arch/i386/kernel/tsc.c                      |  306 +++++++++++++
>  b/arch/i386/lib/delay.c                       |   16 
>  b/drivers/Makefile                            |    1 
>  b/drivers/acpi/processor_idle.c               |    6 
>  b/drivers/char/hangcheck-timer.c              |    5 
>  b/drivers/timesource/Makefile                 |    8 
>  b/drivers/timesource/acpi_pm.c                |  152 ++++++
>  b/drivers/timesource/cyclone.c                |  138 ++++++
>  b/drivers/timesource/hpet.c                   |   59 ++
>  b/drivers/timesource/i386_pit.c               |   63 ++
>  b/drivers/timesource/jiffies.c                |   74 +++
>  b/drivers/timesource/tsc-interp.c             |  112 ++++
>  b/drivers/timesource/tsc.c                    |   92 ++++
>  b/include/asm-generic/timeofday.h             |   26 +
>  b/include/asm-i386/mach-default/mach_timer.h  |    4 
>  b/include/asm-i386/mach-summit/mach_mpparse.h |    2 
>  b/include/asm-i386/timeofday.h                |    4 
>  b/include/asm-i386/timer.h                    |   57 --
>  b/include/asm-i386/timex.h                    |   34 -
>  b/include/asm-i386/tsc.h                      |   50 ++
>  b/include/linux/time.h                        |    4 
>  b/include/linux/timeofday.h                   |   83 +++
>  b/include/linux/timesource.h                  |  172 +++++++
>  b/include/linux/timex.h                       |   33 +
>  b/init/main.c                                 |    2 
>  b/kernel/Makefile                             |    1 
>  b/kernel/time.c                               |   90 ++-
>  b/kernel/timeofday.c                          |  575 +++++++++++++++++++++++++
>  b/kernel/timer.c                              |  305 ++++++++-----
>  b/kernel/timesource.c                         |  259 +++++++++++
>  46 files changed, 2583 insertions(+), 2244 deletions(-)


Ack. I just realized I might hit size restrictions on lkml. 

bz'ed patch attached.

Sorry,
-john


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