Date: Sat, 04 Jan 2003 13:37:48 +0100 From: Poul-Henning Kamp <phk@freebsd.org> To: current@freebsd.org Subject: LOR on SIGINFO... Message-ID: <9158.1041683868@critter.freebsd.dk>
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I pressed ctrl-T to see how far my compile had come and was rewarded
with a LOR:
llock order reversal
1st 0xc0347680 sched lock (sched lock) @ ../../../kern/tty.c:2386
2nd 0xc039f3e0 sio (sio) @ ../../../dev/sio/sio.c:3200
Debugger("witness_lock")
Stopped at Debugger+0x54: xchgl %ebx,in_Debugger.0
db> trace
Debugger(c0308bc1,c039f3e0,c035cf40,c035cf40,c0330b72) at Debugger+0x54
witness_lock(c039f3e0,8,c0330b72,c80,c0322f08) at witness_lock+0x667
_mtx_lock_spin_flags(c039f3e0,0,c0330b72,c80,0) at _mtx_lock_spin_flags+0xd1
siocnputc(c036fca0,63,5,d6985b68,0) at siocnputc+0x81
cnputc(63,ffffffff,1,c032024c,225) at cnputc+0x5d
putchar(63,d6985b68,d6985aa0,c01c84b4,c14f9800) at putchar+0xcd
kvprintf(c032024b,c01e04f0,d6985b68,a,d6985b88) at kvprintf+0x8d
printf(c032024b,2a51,108f5,c4b06868,c0322f08) at printf+0x57
calcru(c4b06720,d6985c40,d6985c48,0,22a) at calcru+0x20b
ttyinfo(c14f9800,0,c0324bb5,22a,c01b98bd) at ttyinfo+0x1f9
ttyinput(14,c14f9800,c0330b72,647,c3fe2740) at ttyinput+0x7c3
sioinput(c401b000,0,c0330b72,856,0) at sioinput+0x1d3
siopoll(0,0,c031e372,216,c14fe720) at siopoll+0x116
ithread_loop(c14fbe80,d6985d48,c031e1ef,361,0) at ithread_loop+0x182
fork_exit(c01b0680,c14fbe80,d6985d48) at fork_exit+0xc4
fork_trampoline() at fork_trampoline+0x1a
--- trap 0x1, eip = 0, esp = 0xd6985d7c, ebp = 0 ---
db>
--
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
phk@FreeBSD.ORG | TCP/IP since RFC 956
FreeBSD committer | BSD since 4.3-tahoe
Never attribute to malice what can adequately be explained by incompetence.
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