On Oct 3, 2006, at 12:46 PM, DeadMan Xia wrote:
I compile the kernel with normal IPFIREWALL, IPFIREWALL_FORWARD. I
got some
power with my power, every night my UPS batteries get discharged
and my
system shutdown hard. its about 4 to 6 times my system get Hard
Shut in 2
days. although i run fsck do make my filesystem fix.
You should connect your UPS to the machine and have it shut down the
system cleanly before your UPS battery is exhausted. At least, if
your UPS is smart enough to do so.
Now when i reboot my system, in dmesg i m getting warning like
ioapic0: Changing APIC ID to 2
ioapic1: Changing APIC ID to 3
ioapic1: WARNING: intbase 32 != expected base 24
ioapic2: Changing APIC ID to 4
ioapic2: WARNING: intbase 64 != expected base 56
ioapic3: Changing APIC ID to 5
ioapic3: WARNING: intbase 96 != expected base 88
ioapic0 Version 2.0 irqs 0-23 on motherboard
ioapic1 Version 2.0 irqs 32-55 on motherboard
ioapic2 Version 2.0 irqs 64-87 on motherboard
ioapic3 Version 2.0 irqs 96-119 on motherboard
This is completely unrelated. The APIC, Advanced Programmable
Interrupt Controller, is what permits newer machines to access more
than the 15 IRQ's traditionally available using Intel 8259 PICs. I
believe that the default expectation was that each APIC ID would
control up to 32 IRQ lines, but the APIC in your Dell is set up to
only control 24 IRQs per ID.
In theory, you can ignore these warnings, although in practice there
still may be interrupt aliasing issues between IRQs which should be
separate but are multiples of each other modulo 32 (or 24? in this
case?). Again, this is unrelated to having your machine shut down
uncleanly because AC line power failed...
--
-Chuck
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