Jan Kiszka wrote: > Philippe Gerum wrote: >> On Tue, 2007-09-25 at 16:09 +0200, Jan Kiszka wrote: >>> Hi, >>> >>> to make it short has anyone or could anyone try latest SVN over kernel >>> 2.6.20 (i-pipe for 2.6.22 is instable) _without_ LAPIC? It works for me, >>> but exposes milliseconds of latencies. Same setup with LAPIC enabled is >>> fine and obviously stable. Before digging into this (time is short >>> anyway), I would like to exclude problems of my notebook hardware. >>> >> Not confirmed here. Everything looks ok. > > Yes, I found a second box working fine with a comparable (though not > identical) config. I suspect some hw issue of my notebook now, but I > will try to look into this a bit deeper once time permits.
It was a correlation between trying to use the PIT while Linux fiddled with the HPET (when HPET is in use, the PIT cannot be programmed). See my attached warning patch which may prevent others from pulling hairs. > More important is to understand and fix the consistent 2.6.22 issues I > see. Only works in qemu for me, all real i386 boxes lock up sooner or > later. :-/ I'm on this. Multiple bugs are involved, at least one of them is visible already with vanilla on my work notebook. Another one is related to Xenomai not dealing with the lapic device being in CLOCK_EVT_MODE_SHUTDOWN whenever the NMI watchdog is in use. And a third one only gives me "Detected illicit call from domain Xenomai" before the box reboots. :( Jan
Index: xenomai/scripts/Kconfig.frag
===================================================================
--- xenomai/scripts/Kconfig.frag (Revision 3019)
+++ xenomai/scripts/Kconfig.frag (Arbeitskopie)
@@ -11,8 +11,13 @@ comment "NOTE: Xenomai conflicts with PC
comment "(menu Device Drivers/Input device support/Miscellaneous devices)"
depends on !X86_TSC && X86 && INPUT_PCSPKR
+comment "NOTE: Xenomai conflicts with HPET Timer support."
+ depends on !X86_LOCAL_APIC && X86 && HPET_TIMER
+comment "(menu Processor type and features/HPET Timer Support)"
+ depends on !X86_LOCAL_APIC && X86 && HPET_TIMER
+
config XENOMAI
- depends on (X86_TSC || !X86 || !INPUT_PCSPKR)
+ depends on ((X86_TSC || !X86 || !INPUT_PCSPKR) && (!HPET_TIMER || !X86 || X86_LOCAL_APIC))
bool "Xenomai"
default y
select IPIPE
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