Date: Thu, 31 Mar 2005 14:38:26 -0600 From: William Michael Grim <wgrim@siue.edu> To: hackers@freebsd.org Subject: 4BSD Scheduler Problem on 5.3 Message-ID: <20050331203826.GA31110@siue.dnsalias.net>
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Hello.
I keep having kernel panics every couple weeks on my system. It occurs in the
sched_switch() function. There are several other statements in the
backtrace involving "??"; what are those?
I have attached the dump output and system info to this email. Any feedback
would be helpful.
Thanks so much for your help.
--
William Michael Grim
Student, Southern Illinois University at Edwardsville
Unix Network Administrator, SIUE, Computer Science dept.
Phone: (217) 341-6552
Email: wgrim@siue.edu
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Good dump found on device /dev/aacd0s1b
Architecture: i386
Architecture version: 1
Dump length: 1073676288B (1023 MB)
Blocksize: 512
Dumptime: Tue Feb 1 00:27:24 2005
Hostname: mania.cs.siue.edu
Versionstring: FreeBSD 5.3-RELEASE #2: Tue Nov 16 22:58:39 CST 2004
unix@mania.cs.siue.edu:/usr/obj/usr/src/sys/MANIA
Panicstring: page fault
Bounds: 0
[GDB will not be able to debug user-mode threads: /usr/lib/libthread_db.so: Undefined symbol "ps_pglobal_lookup"]
GNU gdb 6.1.1 [FreeBSD]
Copyright 2004 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB. Type "show warranty" for details.
This GDB was configured as "i386-marcel-freebsd".
(no debugging symbols found)...0xc04e7c7a in doadump ()
(kgdb) bt
#0 0xc04e7c7a in doadump ()
#1 0xc04e8273 in boot ()
#2 0xc04e85c9 in panic ()
#3 0xc064d850 in trap_fatal ()
#4 0xc064d583 in trap_pfault ()
#5 0xc064d199 in trap ()
#6 0xc063d2ba in calltrap ()
#7 0xc04d0018 in exit1 ()
#8 0xc0516b69 in ttwakeup ()
#9 0xc05157cc in ttymodem ()
#10 0xc05194b7 in ptcopen ()
#11 0xc04b0b76 in spec_open ()
#12 0xc04b08bb in spec_vnoperate ()
#13 0xc05464f5 in vn_open_cred ()
#14 0xc05460da in vn_open ()
#15 0xc05401f3 in kern_open ()
#16 0xc054010c in open ()
#17 0xc064db63 in syscall ()
#18 0xc063d30f in Xint0x80_syscall ()
#19 0x0000002f in ?? ()
#20 0x0807002f in ?? ()
#21 0xbfbf002f in ?? ()
#22 0xffffffff in ?? ()
#23 0x280d1c2d in ?? ()
#24 0xbfbfe2d8 in ?? ()
#25 0xef5eed74 in ?? ()
#26 0x280d3860 in ?? ()
#27 0x280d1c4a in ?? ()
#28 0x283395ec in ?? ()
#29 0x00000005 in ?? ()
#30 0x0000000c in ?? ()
#31 0x00000002 in ?? ()
#32 0x282c2517 in ?? ()
#33 0x0000001f in ?? ()
#34 0x00000292 in ?? ()
#35 0xbfbfe27c in ?? ()
#36 0x0000002f in ?? ()
#37 0xffffffff in ?? ()
#38 0xffffffff in ?? ()
#39 0x00000000 in ?? ()
#40 0x00000000 in ?? ()
#41 0x110c8000 in ?? ()
#42 0xc6cb5388 in ?? ()
#43 0xc814a960 in ?? ()
#44 0xef5eeb00 in ?? ()
#45 0xef5eeae8 in ?? ()
#46 0xc1e7c7d0 in ?? ()
#47 0xc04f88ab in sched_switch ()
(kgdb) q
Previous frame inner to this frame (corrupt stack?)
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