Miroslav Lichvar 8af3c153ba ntp: Clamp PLL update interval ...

Clamp update interval to reduce PLL gain with low sampling rate (e.g.
intermittent network connection) to avoid instability.

The clamp roughly corresponds to the loop time constant, it's 8 * poll
interval for SHIFT_PLL 2 and 32 * poll interval for SHIFT_PLL 4. This
gives good results without affecting the gain in normal conditions where
ntpd skips only up to seven consecutive samples.

Signed-off-by: Miroslav Lichvar <[email protected]>
Acked-by: john stultz <[email protected]>
LKML-Reference: <[email protected]>
Signed-off-by: Thomas Gleixner <[email protected]>

2010-09-09 20:48:37 +02:00

..

clockevents.c

clockevent: Don't remove broadcast device when cpu is dead

2010-01-18 14:44:50 +01:00

clocksource.c

clocksource: Add __clocksource_updatefreq_hz/khz methods

2010-07-27 12:40:55 +02:00

jiffies.c

…

Kconfig

time: Kill off CONFIG_GENERIC_TIME

2010-07-27 12:40:54 +02:00

Makefile

time: add function to convert between calendar time and broken-down time for universal use

2009-09-24 07:20:56 -07:00

ntp.c

ntp: Clamp PLL update interval

2010-09-09 20:48:37 +02:00

tick-broadcast.c

fix comment/printk typos concerning "already"

2010-07-11 21:45:40 +02:00

tick-common.c

clockevents: Convert to raw_spinlock

2009-12-14 23:55:34 +01:00

tick-internal.h

clockevents: Make tick_device_lock static

2009-12-14 23:55:34 +01:00

tick-oneshot.c

clockevents: Sanitize min_delta_ns adjustment and prevent overflows

2010-03-12 19:10:29 +01:00

tick-sched.c

Merge branch 'timers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

2010-08-06 13:12:36 -07:00

timecompare.c

include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h

2010-03-30 22:02:32 +09:00

timeconv.c

time: add function to convert between calendar time and broken-down time for universal use

2009-09-24 07:20:56 -07:00

timekeeping.c

time: Workaround gcc loop optimization that causes 64bit div errors

2010-08-13 12:03:24 -07:00

timer_list.c

sched: Intoduce get_cpu_iowait_time_us()

2010-05-09 19:35:27 +02:00

timer_stats.c

hrtimers: Convert to raw_spinlocks

2009-12-14 23:55:34 +01:00