Hi, I install FC3,and running about 20 days, get kernel panic. This server serves mult-threads program(about 100 concurrent threads), I/O is heavy. Below is the message leaving on screen: 0211 040b smp_apic_timer_interrupt+0xdd/0xel 02103f29 mwait_idle+0x33/0x42 2103ee1 cpu_idle+0x26/0x3b 0235678b start_kernel+0x18a/)x18e code:8b 54 24 18 8b 4c 24 18 8b 42 78 89 c2 c1 fa 02 01 d0 8b 91 84 00 00 00 39 c2 0f 4f d0 8b 41 60 39 d0 0f 8f 72 02 00 00 8b 45 10 <39> 43 48 79 54 39 43 4c 79 08 0f 0b 07 04 b5 41 2b 02 8b 54 24 <0>kernel panic-not syncing:fatal exception in interrupt Any suggestions are welcome. Regards, Steven Zhang