linux/kernel/time
Thomas Gleixner 1fb9b7d29d clockevents: prevent endless loop lockup
The C1E/HPET bug reports on AMDX2/RS690 systems where tracked down to a
too small value of the HPET minumum delta for programming an event.

The clockevents code needs to enforce an interrupt event on the clock event
device in some cases. The enforcement code was stupid and naive, as it just
added the minimum delta to the current time and tried to reprogram the device.
When the minimum delta is too small, then this loops forever.

Add a sanity check. Allow reprogramming to fail 3 times, then print a warning
and double the minimum delta value to make sure, that this does not happen again.
Use the same function for both tick-oneshot and tick-broadcast code.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-09-05 11:11:53 +02:00
..
clockevents.c clockevents: prevent clockevent event_handler ending up handler_noop 2008-09-05 11:11:51 +02:00
clocksource.c Merge branch 'cpus4096-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2008-07-23 18:37:44 -07:00
jiffies.c [PATCH] fix jiffies clocksource inittime 2007-04-04 21:12:47 -07:00
Kconfig clockevents: Allow build w/o run-tine usage for migration purposes 2007-10-12 23:04:05 +02:00
Makefile clockevents: Allow build w/o run-tine usage for migration purposes 2007-10-12 23:04:05 +02:00
ntp.c ntp: handle leap second via timer 2008-05-01 08:03:59 -07:00
tick-broadcast.c clockevents: prevent endless loop lockup 2008-09-05 11:11:53 +02:00
tick-common.c clockevents: prevent clockevent event_handler ending up handler_noop 2008-09-05 11:11:51 +02:00
tick-internal.h clockevents: prevent endless loop lockup 2008-09-05 11:11:53 +02:00
tick-oneshot.c clockevents: prevent endless loop lockup 2008-09-05 11:11:53 +02:00
tick-sched.c nohz: fix wrong event handler after online an offlined cpu 2008-08-21 09:54:06 +02:00
timekeeping.c ntp: handle leap second via timer 2008-05-01 08:03:59 -07:00
timer_list.c kernel: use non-racy method for proc entries creation 2008-04-29 08:06:22 -07:00
timer_stats.c kernel: use non-racy method for proc entries creation 2008-04-29 08:06:22 -07:00