Messages in this thread | | | From | Steve Snyder <> | Subject | increasing APIC errors & spontaneous reboots | Date | Sun, 9 Nov 2003 08:17:08 -0800 |
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Hello.
I'm seeing an increasing number of APIC errors (variable irq_mis_count, displayed as the "MIS:" value in /proc/interrupts) and I'm also seeing spontaneous reboots. Could these be related?
Before I go into details, a little background. I've been using this same motherboard/CPUs/RAM with the 2.4.x kernels for several years with no problems. Oh, the MIS: count would climb to 2, maybe as high as 4 but as no problems were experienced I never much cared. The hardware being used is a Giga-Byte GA-6BXDU motherboard, dual P3/850Mhz processors and 3 256MB sticks of ECC PC100 RAM.
For the last 6 - 8 months I've been seeing the MIS count increasing. The largest I've seen is a value of 20. During the same period I've been seeing spontaneous reboots. The system will reboot itself every 3 to 4 weeks. There's no great uptime here; those APIC errors accumulate in less than a month.
No problems are seen in the system logs for this machine. Things are apparently going along fine, then the next log entry is the starting line of a kernel loading. The system has rebooted. (I'm administering this machine remotely, so I can't report any text shown on the screen.)
I initially suspected the problems were heat-related (no, I do not overclock anything) but lm_sensors consistently shows the CPU fan rotations and temperatures to be of reasonable values.
Although this generally is a Red Hat v7.3 system, I run the latest stable plain-vanilla Linux kernel, not RH's patched versions. I am currently running v2.4.22, with v2.4.21 before that.
Can anyone explain to me what would cause the increasing APIC MIS counts? Also, could this cause the system to reboot?
Thanks.
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