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git.kernel.org/linux-stable/linux-3.2.y
linux-imx/kernel/time/Kconfig
Martin Schwidefsky d1748302f7 clockevents: Make minimum delay adjustments configurable 
The automatic increase of the min_delta_ns of a clockevents device
should be done in the clockevents code as the minimum delay is an
attribute of the clockevents device.

In addition not all architectures want the automatic adjustment, on a
massively virtualized system it can happen that the programming of a
clock event fails several times in a row because the virtual cpu has
been rescheduled quickly enough. In that case the minimum delay will
erroneously be increased with no way back. The new config symbol
GENERIC_CLOCKEVENTS_MIN_ADJUST is used to enable the automatic
adjustment. The config option is selected only for x86.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: john stultz <johnstul@us.ibm.com>
Link: http://lkml.kernel.org/r/20110823133142.494157493@de.ibm.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2011-09-08 11:10:56 +02:00

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Timer subsystem related configuration options

config TICK_ONESHOT bool

config NO_HZ bool "Tickless System (Dynamic Ticks)" depends on !ARCH_USES_GETTIMEOFFSET && GENERIC_CLOCKEVENTS select TICK_ONESHOT help This option enables a tickless system: timer interrupts will only trigger on an as-needed basis both when the system is busy and when the system is idle.

config HIGH_RES_TIMERS bool "High Resolution Timer Support" depends on !ARCH_USES_GETTIMEOFFSET && GENERIC_CLOCKEVENTS select TICK_ONESHOT help This option enables high resolution timer support. If your hardware is not capable then this option only increases the size of the kernel image.

config GENERIC_CLOCKEVENTS_BUILD bool default y depends on GENERIC_CLOCKEVENTS || GENERIC_CLOCKEVENTS_MIGR

config GENERIC_CLOCKEVENTS_MIN_ADJUST bool