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Date: Wed, 16 Jul 2014 21:03:47 -0000
From: Thomas Gleixner <tglx@...utronix.de>
To: LKML <linux-kernel@...r.kernel.org>
Cc: John Stultz <john.stultz@...aro.org>,
Peter Zijlstra <peterz@...radead.org>
Subject: [patch V2 00/64] timekeeping: 2038, optimizations, NMI safe accessors
Changes versus V1 [http://lkml.kernel.org/r/20140711133623.530368377@linutronix.de]
- Addressed review comments and testing fallout
- Simplified update of the ktime_t data in the timekeeper
- Replaced some more interfaces which are availabe as timespec and
ktime_t by the ktime_t version to get rid of the duplicated data.
- Restructured the timekeeper again to share code with the NMI safe
accessor, which simplifies the update to pure memcpy().
- Removed the monotonic raw fast accessor
I also verified the size impact of the whole endavour:
x86_64:
text data bss dec hex filename
before:
992378 104211 454784 1551373 17ac0d ../build/kernel/built-in.o
2038 changes only:
992312 104211 454784 1551307 17abcb ../build/kernel/built-in.o
full series applied:
991724 104210 454976 1550910 17aa3e ../build/kernel/built-in.o
i386:
text data bss dec hex filename
before:
910278 56201 372436 1338915 146e23 ../build-i386/kernel/built-in.o
2038 changes only:
912381 56201 372468 1341050 14767a ../build-i386/kernel/built-in.o
full series applied:
911607 56200 372596 1340403 1473f3 ../build-i386/kernel/built-in.o
arm:
text data bss dec hex filename
before:
443444 58965 7813144 8315553 7ee2a1 ../build-arm/kernel/built-in.o
2038 changes only:
445205 58965 7813176 8317346 7ee9a2 ../build-arm/kernel/built-in.o
full series applied:
444708 58964 7813368 8317040 7ee870 ../build-arm/kernel/built-in.o
So on x8664 the new functionality comes with smaller size. I whish I
could say the same for 32bit, but there we pay the prize for making
the core timekeeping code 2038 ready. But also there, while the 2038
stuff adds ~2k, the rest (cleanup and the new monotonic accessor)
removes ~0.5k again. So features are not necessarily bundled with
bloat :)
The series is against tip/timers/core. It's also available in git at:
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git tglx/timers/core
Thanks,
tglx
----
arch/arm/Kconfig | 1
arch/arm/common/bL_switcher.c | 16
arch/arm64/kernel/vdso.c | 10
arch/hexagon/Kconfig | 1
arch/ia64/kernel/time.c | 4
arch/powerpc/kernel/time.c | 4
arch/powerpc/platforms/cell/spu_base.c | 11
arch/powerpc/platforms/cell/spufs/context.c | 4
arch/powerpc/platforms/cell/spufs/file.c | 4
arch/powerpc/platforms/cell/spufs/sched.c | 4
arch/s390/Kconfig | 1
arch/s390/kernel/time.c | 16
arch/tile/kernel/time.c | 13
arch/tile/kernel/vdso/vgettimeofday.c | 7
arch/x86/Kconfig | 2
arch/x86/kernel/tsc.c | 21
arch/x86/kernel/vsyscall_gtod.c | 23
arch/x86/kvm/x86.c | 62 -
drivers/char/hangcheck-timer.c | 33
drivers/connector/cn_proc.c | 36
drivers/gpu/drm/drm_irq.c | 16
drivers/gpu/drm/i915/i915_drv.h | 2
drivers/gpu/drm/i915/i915_gem.c | 33
drivers/gpu/drm/i915/intel_pm.c | 12
drivers/gpu/drm/vmwgfx/vmwgfx_drv.h | 4
drivers/gpu/drm/vmwgfx/vmwgfx_marker.c | 44 -
drivers/hwmon/ibmaem.c | 6
drivers/input/evdev.c | 7
drivers/mfd/cros_ec_spi.c | 8
drivers/misc/ioc4.c | 7
drivers/net/ethernet/mellanox/mlx5/core/cmd.c | 16
drivers/net/wireless/ath/ath9k/hw.c | 7
fs/lockd/mon.c | 4
fs/proc/array.c | 7
fs/timerfd.c | 6
include/linux/clocksource.h | 2
include/linux/hrtimer.h | 14
include/linux/iio/iio.h | 9
include/linux/ktime.h | 228 +-----
include/linux/mlx5/driver.h | 4
include/linux/sched.h | 8
include/linux/seqlock.h | 27
include/linux/time.h | 65 -
include/linux/time64.h | 191 +++++
include/linux/timekeeper_internal.h | 144 ++-
include/linux/timekeeping.h | 209 +++++
kernel/acct.c | 10
kernel/delayacct.c | 52 -
kernel/fork.c | 5
kernel/time/Kconfig | 9
kernel/time/clocksource.c | 12
kernel/time/hrtimer.c | 80 --
kernel/time/ntp.c | 15
kernel/time/ntp_internal.h | 2
kernel/time/posix-timers.c | 2
kernel/time/tick-internal.h | 2
kernel/time/time.c | 64 +
kernel/time/timekeeping.c | 957 ++++++++++++++------------
kernel/time/timekeeping.h | 20
kernel/time/timekeeping_debug.c | 2
kernel/time/timekeeping_internal.h | 17
kernel/trace/trace.c | 11
kernel/tsacct.c | 19
63 files changed, 1412 insertions(+), 1220 deletions(-)
--
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