I had been running CentOS 5 happily on my Sun Fire X4200 M2 systems,
then I upgraded the BIOS and iLOM firmware. Now I'm running into what
seems to be a fairly common problem with newer motherboards. I cannot
boot unless I use the 'noapic' kernel option. If I try to boot the
kernel normally, I get the error:
"MP-BIOS bug: 8254 timer not connected to IO-APIC"
I can boot using noapic, but interrupts are *HORRIBLE* with noapic on
the X4200 M2. Here is a system with the new BIOS running with noapic:
[rordway@aphrodite ~]$ uname -a
Linux aphrodite 2.6.18-53.1.4.el5.centos.plus #1 SMP Fri Dec 7
07:05:12 EST 2007 x86_64 x86_64 x86_64 GNU/Linux
[rordway@aphrodite ~]$ cat /proc/interrupts
CPU0 CPU1 CPU2 CPU3
0: 149047419 568805 215848 76392 XT-PIC timer
1: 0 2 0 0 XT-PIC i8042
2: 0 0 0 0 XT-PIC
cascade
4: 399 80 58 26 XT-PIC
serial
5: 138 19 4 4 XT-PIC
ehci_hcd:usb2
7: 16203243 179851060 180334480 180522274 XT-PIC
ioc0, eth1
8: 1 0 0 0 XT-PIC rtc
9: 0 0 0 0 XT-PIC acpi
11: 764 64 17 21 XT-PIC
ohci_hcd:usb1
12: 2 2 0 0 XT-PIC i8042
14: 77 6 13 3 XT-PIC ide0
15: 15353489 192264 58884 10141 XT-PIC eth0
NMI: 0 0 0 0
LOC: 149884909 149891944 149889634 149890602
ERR: 377601098
MIS: 0
Compare this to an identical system running an identical kernel, but
the older BIOS:
[rordway@selene ~]$ uname -a
Linux selene 2.6.18-53.1.4.el5.centos.plus #1 SMP Fri Dec 7 07:05:12
EST 2007 x86_64 x86_64 x86_64 GNU/Linux
[rordway@selene ~]$ cat /proc/interrupts
CPU0 CPU1 CPU2 CPU3
0: 415472769 0 0 0 IO-APIC-edge timer
1: 2 0 0 0 IO-APIC-edge i8042
4: 270 0 10 17 IO-APIC-edge
serial
8: 1 0 0 0 IO-APIC-edge rtc
9: 0 0 0 0 IO-APIC-level acpi
12: 4 0 0 0 IO-APIC-edge i8042
14: 25 74 0 0 IO-APIC-edge ide0
58: 323 464 0 0 IO-APIC-level
ohci_hcd:usb1
66: 26 0 0 0 IO-APIC-level
ehci_hcd:usb2
74: 5940 981922 7254 524 IO-APIC-level ioc0
82: 2026 53828037 0 138601 IO-APIC-level eth0
90: 2237 61820570 0 689058 IO-APIC-level eth1
NMI: 0 0 0 0
LOC: 415433007 415433000 415432928 415432856
ERR: 0
MIS: 0
Note the huge ERR count with XT-APIC, and ioc0 and eth1 sharing an
interrupt (SAS controller and my private network interface)
Does anyone know if this has been fixed in the mainline kernel, and if
so if this can be integrated into the CentOS 5.1 kernel (namely the
CentOS Plus kernel)?
Thanks!
Ryan
--
Ryan Ordway E-mail: rordway@xxxxxxxxxxxxxxx
Unix Systems Administrator rordway@xxxxxxxxxxxxxxxxxxxxxxx
OSU Libraries, Corvallis, OR 97331 Office: Valley Library #4657
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