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SubjectRe: 2.4.24 SMP lockups
On Sat, Jan 10, 2004 at 02:40:49PM -0800, Andrew Morton wrote:

> Presumably it's spinning on the lock with interrupts enabled. Make that
> the `NMI' counters in /proc/interrupts are incrementing for all CPUs.

Actually, on one of the boxes it doesn't seem to be working at all:

activating NMI Watchdog ... done.
testing NMI watchdog ... CPU#0: NMI appears to be stuck!

This is on a Tyan Dual AMD MPX board with two MP 2000+ CPUs.
/proc/interrupts shows:

CPU0 CPU1
0: 4897433 4904751 IO-APIC-edge timer
1: 1 1 IO-APIC-edge keyboard
2: 0 0 XT-PIC cascade
8: 1 0 IO-APIC-edge rtc
16: 699524 700761 IO-APIC-level dpti0
19: 12480119 12480207 IO-APIC-level eth0
NMI: 0 0
LOC: 9801455 9801319
ERR: 0
MIS: 13

I'll try reenabling it on the other (Intel) boxes where I think it
actually does work, and see if anything results.

> sysrq-T would be best.

I'll do the serial console dance next time and get some sysrq-T output.

Simon-
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