Messages in this thread | | | Date | Thu, 12 Jul 2001 14:44:36 +0200 (MEST) | From | <> | Subject | apic, and spontaneous reboots with smp diskless clients on 2.4.x |
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I have a cluster of diskless clients with the following spec:
ASUS CUR_DLS FC-PGA Motherboard with dual 1Ghz PIII /768MB Registered SDRAM, on board eepro100.
They boot nfsroot from a PIII 1Ghz running 2.4.6-xfs with nfsv3. The diskless client root is on an ext2 filesystem. The master is stable.
one or more of the clients will always either lock up or reboot under moderate load (kernel compile across all of them, cfdrc software run...). I started with 2.4.6, tried 2.4.5, and am now running 2.4.3-12 (redhat sources). The 2.4.3-12 seems to be more stable, but now some nodes simply lockup instead of rebooting, while other times they reboot. The only thing I can find to give any information about the problem is occasionally on the console (but not in syslog -and I'm logging *.*) are APIC error in CPUx blah(blah) messages, where blah, blah is replaced by various APIC error codes (I haven't been able to determine the frequency or pattern).
I have just rebooted them all with "noapic" and am testing again, also collecting tcpdump output.
When the machines lock, the sysreq key doesn't do anything. lkcd also of course doesn't help.
In the meantime, searching the archives, I can see a few mentions of similar problems, but I haven't been able to see any threads that reached a useful conclusion (except for going back to 2.2.x). Is there a previous discussion that is applicable and I just haven't understood it?
Can anyone suggest what additional information I can gather/provide in order to debug the problem?
For what it is worth, I have another cluster running the same motherboard with 2.4.1 with local disks (symbios onboard scsi controller) and slower (866Mhz) cpus that doesn't show this problem.
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