Re: panic: APIC: Previous IPI is stuck

I have been having this problem for a few weeks now. Glad I'm not the only 
one. My box is a 4xPPro running 5.3-BETA5. It panics with either ULE 
or 4BSD.

My theory is that a physical IPI gets lost somewhere and the kerenl spins 
waiting for it. But thats just a stab in the dark because nobody cares to 
explain why IPI's would be stuck.

-andyf


On Fri, 24 Sep 2004, Brian Fundakowski Feldman wrote:

> This is on a 2xAthlon with the SCHED_ULE, HZ=1000, SW_WATCHDOG, and nothing
> really special in development.
>
> FreeBSD green.homeunix.org 6.0-CURRENT FreeBSD 6.0-CURRENT #110: Wed Sep 22 11:28:27 EDT 2004     root_at_green.homeunix.org:/usr/src/sys/i386/compile/GREEN  i386
>
> panic: APIC: Previous IPI is stuck
> cpuid = 1
> KDB: stack backtrace:
> kdb_backtrace(c063cae7,1,c063c5e7,d4411b28,c1da2000) at kdb_backtrace+0x2e
> panic(c063c5e7,1,f3,1,2) at panic+0x128
> lapic_ipi_vectored(f3,1,c1da2494,1,c0675910) at 64) at sched_add_internal+0x21e
> kseq_assign(c0675910,1,c0625a07,5e0,c1da1540) at kseq_assign+0x4a
> sched_clock(c1da2000,2,c0621165,17e,d4411c54) at sched_clock+0x74
> statclock(d4411c54,c1ecc840,d4411c3c,c05edc8b,d4411c54) at statclock+0xf8
> rtcintr(d4411c54,c0487af4,c06733a0,2,8) at rtcintr+0x4f
> intr_execute_handlers(c1dca8f0,d4411c54,d4411cb4,c05ea0e3,38) at intr_execute_ha
> ndlers+0xab
> lapic_handle_intr(38) at lapic_handle_intr+0x3a
> Xapic_isr1() at Xapic_isr1+0x33
> --- interrupt, eip = 0xc04a640a, esp = 0xd4411c98, ebp = 0xd4411cb4 ---
> _mtx_lock_sleep(c06733e0,c1da2000,0,c06220e8,222) at _mtx_lock_sleep+0x13a
> _mtx_lock_flags(c06733e0,0,c06220e8,222,0) at _mtx_lock_flags+0xc0
> ithread_loop(c1da6200,d4411d48,c0621edb,31f,c1da6200) at ithread_loop+0x15a
> fork_exit(c0499660,c1da6200,d4411d48) at fork_exit+0xc6
> fork_trampoline() at fork_trampoline+0x8
> --- trap 0x1, eip = 0, esp = 0xd4411d7c, ebp = 0 ---
> KDB: enter: panic
> panic: APIC: Previous IPI is stuck
> cpuid = 1
> boot() called on cpu#1
> Uptime: 2d0h16m55s
> ^^ full hang instead of reset
>
> -- 
> Brian Fundakowski Feldman                           \'[ FreeBSD ]''''''''''\
>  <> green_at_FreeBSD.org                               \  The Power to Serve! \
> Opinions expressed are my own.                       \,,,,,,,,,,,,,,,,,,,,,,\