]> git.karo-electronics.de Git - linux-beck.git/commit
timekeeping: Update clocksource with stop_machine
authorMartin Schwidefsky <schwidefsky@de.ibm.com>
Fri, 14 Aug 2009 13:47:30 +0000 (15:47 +0200)
committerThomas Gleixner <tglx@linutronix.de>
Sat, 15 Aug 2009 08:55:46 +0000 (10:55 +0200)
commit75c5158f70c065b9704b924503d96e8297838f79
tree74b02ba1f13aaf8292bd472a8a197ac900ff20e7
parent2ba2a3054fdffc8e6452f4ee120760322a6fbd43
timekeeping: Update clocksource with stop_machine

update_wall_time calls change_clocksource HZ times per second to check
if a new clock source is available. In close to 100% of all calls
there is no new clock. Replace the tick based check by an update done
with stop_machine.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Ingo Molnar <mingo@elte.hu>
Acked-by: John Stultz <johnstul@us.ibm.com>
Cc: Daniel Walker <dwalker@fifo99.com>
LKML-Reference: <20090814134810.711836357@de.ibm.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
include/linux/clocksource.h
kernel/time/clocksource.c
kernel/time/timekeeping.c