Well, looks fine. It's edge triggered. My assumption that the
T1_INT_STS must be cleared is wrong since the complete HPET code
assumes edge-triggered interrupts. To use level-triggered interrupts,
the HPET must be programmed in level triggered mode, i.e. the
Tn_INT_TYPE_CNF bit must be set. Which is never done.
Back to the original problem. Can you please watch the interrupts from
the RTC until the lockup happens with something like
------------------------- 8< -----------------------------------
function get_total_irqs()
{
sum=0
for n in $(grep rtc /proc/interrupts | \
sed -e 's/.*://g' | \
sed -e 's/[a-zA-Z].*//g' ) ;
do sum=$[$sum+$n]
done
echo $sum
}
last=$(get_total_irqs)
while true ; do
sum=$(get_total_irqs)
echo $[$sum-$last]
last=$sum
sleep 1
done
------------------------- >8 -----------------------------------
Also, please send the full .config (maybe via private mail if that's
too large for LKML, or upload it).
Ok. Maybe don't use the patch I sent, instead use:
Bernhard
--- a/arch/x86/kernel/hpet.c
+++ b/arch/x86/kernel/hpet.c
@@ -680,6 +680,12 @@ irqreturn_t hpet_rtc_interrupt(int irq,
struct rtc_time curr_time;
unsigned long rtc_int_flag = 0;
+ if (printk_ratelimit())
+ printk(KERN_DEBUG "hpet_rtc_interrupt %s%s%s\n",
+ (hpet_rtc_flags & RTC_UIE) ? "RTC_UIE " : "",
+ (hpet_rtc_flags & RTC_AIE) ? "RTC_AIE " : "",
+ (hpet_rtc_flags & RTC_PIE) ? "RTC_PIE " : "");
+
hpet_rtc_timer_reinit();
memset(&curr_time, 0, sizeof(struct rtc_time));
--
