* Pavel Machek <[EMAIL PROTECTED]> [050202 06:13]: > > Hi! > > > > > > I used your config advices from second mail, still it does not work as > > > > > expected: system gets "too sleepy". Like it takes a nap during boot > > > > > after "dyn-tick: Maximum ticks to skip limited to 1339", and key is > > > > > needed to make it continue boot. Then cursor stops blinking and > > > > > machine is hung at random intervals during use, key is enough to awake > > > > > it. > > > > > > > > Hmmm, that sounds like the local APIC does not wake up the PIT > > > > interrupt properly after sleep. Hitting the keys causes the timer > > > > interrupt to get called, and that explains why it keeps running. But > > > > the timer ticks are not happening as they should for some reason. > > > > This should not happen (tm)... > > > > > > :-). Any ideas how to debug it? Previous version of patch seemed to work > > > better... > > > > I don't think it's HPET timer, or CONFIG_SMP. It also looks like your > > local APIC timer is working. > > I turned off CONFIG_PREEMPT, but nothing changed :-(.
What about reprogramming the timers in time.c after the sleep? Do you to dyn_tick->skip = 1; part in dyn_tick_timer_interrupt? It could also be that the reprogamming of PIT timer does not work on your machine. I chopped off the udelays there... Can you try something like this:
--- a/arch/i386/kernel/time.c 2005-01-27 12:58:04 -08:00 +++ b/arch/i368/kernel/time.c 2005-02-02 19:01:31 -08:00 @@ -479,8 +480,11 @@ spin_lock_irqsave(&i8253_lock, flags); outb_p(0x34, PIT_MODE); /* binary, mode 2, LSB/MSB, ch 0 */ + udelay(10); outb_p(skip & 0xff, PIT_CH0); /* LSB */ + udelay(10); outb(skip >> 8, PIT_CH0); /* MSB */ + udelay(10); spin_unlock_irqrestore(&i8253_lock, flags); }