on 2/12/2008 9:13 PM Chandra spake the following:
As has been stated many times on this list, unless the upstream creator decides to make that change, it won't get done here either. CentOS is meant to be as close to the RedHat offering as you can get without a support contract.2008/2/6 Ross S. W. Walker <rwalker-gVKREKZ8iPqaMJb+Lgu22Q@xxxxxxxxxxxxxxxx>:I don't think that is the "harmless" error message mentioned in the release notes as that had to do with the "crash kernel". I saw this same error on a Dell AMD system. It seems the motherboard in that system didn't do ACPI IRQ routing as the kernel expected and experienced a lot of random problems until "acpi=noirq" was passed as a kernel option to disable ACPI IRQ routing defaulting back to the APIC IRQ routing. If that still gives you problems then you may need to use "irq=poll" which forces the kernel to poll for IRQ changes. -RossThanks a lot for the tip. This seems to have worked. My system is running continuously from last 45 hours without any hang. This is the miracle grub.conf entry: kernel /boot/vmlinuz-2.6.18-53.el5PAE ro root=LABEL=/12 irq=poll acpi=off noapic nolapic early-login quiet with the acpid daemon off. It is working well with the OpenMP parallelization. When I tried without the "noapic nolapic" option in grub.conf, the system worked with serial code but hanged while the OpenMP is used for parallelization. Anyway, thanks a lot for all you guys' responses. Well, I don't have much idea but when the kernel detects multiple cpus, the "irq=poll" entry should be added by default. It may be useful in solving a lot of such problems (well, just a thought) (-__^) -Chandra
But I'm sure they would appreciate a few $$$ here and there! ;-P -- MailScanner is like deodorant... You hope everybody uses it, and you notice quickly if they don't!!!!
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