Eric W. Biederman wrote: > Neil Horman <nhorman at tuxdriver.com> writes: > >> So, it sounds to me then, like unless I'm willing to really re-write the APIC >> setup code (which I don't feel qualified to do quite yet), that the immediate >> solution would be to not rely on interrupts in legacy mode, which was according >> to my understanding, what the use of the irqpoll command line option was >> supposed to enable. Any thoughts as to why that might not be working in this >> case, or suggested tests to determine a cause there? > > Hmm. It looks like irqpoll expects to have at least one irq working. > I wonder if we can fix that. > > Looking at it from the other direction what does this line > from check_timer() look like when you boot a normal kernel? > > apic_printk(APIC_VERBOSE,KERN_INFO "..TIMER: vector=0x%02X apic1=%d pin1=%d apic2=%d pin2=%d\n", > cfg->vector, apic1, pin1, apic2, pin2); > Here is what I get on a normal boot of the problem motherboard: ..TIMER: vector=0x31 apic1=0 pin1=2 apic2=-1 pin2=-1 > I'm curious what values we see at boot for the legacy mode the first > time it is setup, and possibly what chipset you are on. > I know we have had a few times where we have failed to reprogram > the ioapic properly at shutdown. So it can't hurt to look at > that possibility one last time. > > > For whatever it is worth my original attempt at using only the > apic mode was commit: f2b36db692b7ff6972320ad9839ae656a3b0ee3e > Looks like I didn't have an x86_64 version. > > It looks like about half the cleanups I needed was to decouple > smp cpu startup and apic initialization. I think the hotplug cpu > case has done a more thorough version of that now. > > There was a bit of reshuffling needed to get the everything initialized > in the right order when we started apic mode sooner. > > Anyway I might just take another look at this if I can find enough > moments to string together. > > Eric > > _______________________________________________ > kexec mailing list > kexec at lists.infradead.org > http://lists.infradead.org/mailman/listinfo/kexec -- -ben -=-
