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[PATCH] HZ free ntp

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Distangle the NTP update from HZ.  This is necessary for dynamic tick enabled
kernels.

Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: john stultz <johnstul@us.ibm.com>
Cc: Roman Zippel <zippel@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
john stultz
2007-02-16 01:27:26 -08:00
committed by Linus Torvalds
parent 771ee3b04e
commit f4304ab215
4 changed files with 36 additions and 16 deletions
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4
kernel/timer.c
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@@ -890,7 +890,7 @@ void __init timekeeping_init(void)
ntp_clear();
clock = clocksource_get_next();
clocksource_calculate_interval(clock, tick_nsec);
clocksource_calculate_interval(clock, NTP_INTERVAL_LENGTH);
clock->cycle_last = clocksource_read(clock);
write_sequnlock_irqrestore(&xtime_lock, flags);
@@ -1092,7 +1092,7 @@ static void update_wall_time(void)
if (change_clocksource()) {
clock->error = 0;
clock->xtime_nsec = 0;
clocksource_calculate_interval(clock, tick_nsec);
clocksource_calculate_interval(clock, NTP_INTERVAL_LENGTH);
}
}