mirror of
https://github.com/torvalds/linux.git
synced 2026-09-25 21:21:09 -04:00
Martin Schwidefsky
d1748302f7
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 <[email protected]> Cc: john stultz <[email protected]> Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Thomas Gleixner <[email protected]>
32 lines
841 B
Plaintext
32 lines
841 B
Plaintext
#
|
|
# 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
|