Date: Thu, 30 Apr 2009 20:07:45 +0400 From: Chagin Dmitry <dchagin@freebsd.org> To: David Wolfskill <david@catwhisker.org>, current@freebsd.org Subject: Re: Panic "Fatal trap 18: integer divide fault while in kernel mode" Message-ID: <20090430160745.GA3006@dchagin.static.corbina.ru> In-Reply-To: <20090429161626.GQ1387@albert.catwhisker.org> References: <20090429161626.GQ1387@albert.catwhisker.org>
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--PEIAKu/WMn1b1Hv9 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Wed, Apr 29, 2009 at 09:16:26AM -0700, David Wolfskill wrote: > My build machine had no trouble building & booting r191662, but my > laptop's boot came to a screeching halt rather quickly. Here's > cut/paste for serial console of the single-user mode boot sequence: >=20 >=20 > GDB: no debug ports present > KDB: debugger backends: ddb > KDB: current backend: ddb > SMAP type=3D01 base=3D0000000000000000 len=3D000000000009fc00 > SMAP type=3D02 base=3D000000000009fc00 len=3D0000000000000400 > SMAP type=3D01 base=3D0000000000100000 len=3D000000002fee2800 > SMAP type=3D02 base=3D000000002ffe2800 len=3D000000000001d800 > SMAP type=3D02 base=3D00000000feda0000 len=3D0000000000060000 > SMAP type=3D02 base=3D00000000ffb80000 len=3D0000000000480000 > Copyright (c) 1992-2009 The FreeBSD Project. > Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994 > The Regents of the University of California. All rights reserved. > FreeBSD is a registered trademark of The FreeBSD Foundation. > FreeBSD 8.0-CURRENT #1025 r191662: Wed Apr 29 08:28:59 PDT 2009 > root@g1-37.catwhisker.org:/common/S4/obj/usr/src/sys/CANARY > WARNING: WITNESS option enabled, expect reduced performance. > Preloaded elf kernel "/boot/kernel/kernel" at 0xc1125000. > Preloaded elf module "/boot/kernel/linux.ko" at 0xc112514c. > Preloaded elf module "/boot/kernel/if_an.ko" at 0xc11251f8. > Preloaded elf module "/boot/kernel/if_wi.ko" at 0xc11252a4. > Preloaded elf module "/boot/kernel/radeon.ko" at 0xc1125350. > Preloaded elf module "/boot/kernel/drm.ko" at 0xc11253fc. > Timecounter "i8254" frequency 1193182 Hz quality 0 > Calibrating TSC clock ... TSC clock: 2392949196 Hz > CPU: Mobile Intel(R) Pentium(R) 4 - M CPU 2.40GHz (2392.95-MHz 686-class = CPU) > Origin =3D "GenuineIntel" Id =3D 0xf27 Stepping =3D 7 > Features=3D0xbfebf9ff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,SEP,MTRR,PGE,M= CA,CMOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE> > Features2=3D0x400<CNXT-ID> >=20 > Instruction TLB: 4 KB, 2 MB or 4 MB pages, fully associative, 128 entries > Data TLB: 4 KB or 4 MB pages, fully associative, 64 entries > 1st-level data cache: 8 KB, 4-way set associative, sectored cache, 64 byt= e line size > Trace cache: 12K-uops, 8-way set associative > 2nd-level cache: 512 KB, 8-way set associative, sectored cache, 64 byte l= ine size > real memory =3D 805306368 (768 MB) > Physical memory chunk(s): > 0x0000000000001000 - 0x000000000009efff, 647168 bytes (158 pages) > 0x0000000000100000 - 0x00000000003fffff, 3145728 bytes (768 pages) > 0x0000000001425000 - 0x000000002f2d9fff, 770396160 bytes (188085 pages) > avail memory =3D 769642496 (733 MB) > bios32: Found BIOS32 Service Directory header at 0xc00ffe80 > bios32: Entry =3D 0xffe90 (c00ffe90) Rev =3D 0 Len =3D 1 > pcibios: PCI BIOS entry at 0xf0000+0xbfee > pnpbios: Found PnP BIOS data at 0xc00fe2d0 > pnpbios: Entry =3D f0000:e2f4 Rev =3D 1.0 > pnpbios: Event flag at 4b4 > Other BIOS signatures found: >=20 >=20 > Fatal trap 18: integer divide fault while in kernel mode > cpuid =3D 0; apic id =3D 00 > instruction pointer =3D 0x20:0xc0b34433 > stack pointer =3D 0x28:0xc1420d00 > frame pointer =3D 0x28:0xc1420d20 > code segment =3D base 0x0, limit 0xfffff, type 0x1b > =3D DPL 0, pres 1, def32 1, gran 1 > processor eflags =3D interrupt enabled, resume, IOPL =3D 0 > current process =3D 0 (swapper) > [thread pid 0 tid 100000 ] > Stopped at cpu_topo+0x43: idivl %ecx,%eax > db>=20 >=20 >=20 > [Note: I've been in the habit of tracking head/CURRENT on a daily basis, > and had no problems building today's while running yesterday's, which > was r1916?? -- sorry; looks as if I'll need to boot from a different > kernel to get that info. (I've already powered off my build machine, > and it's at home, while I'm at work.)] >=20 > Is there anything of use I might get from DDB? >=20 It seems it is r191648, cpu_cores or cpu_logical equal to 0. cc to jeff@ --=20 Have fun! chd --PEIAKu/WMn1b1Hv9 Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.10 (FreeBSD) iEYEARECAAYFAkn5zNAACgkQ0t2Tb3OO/O3klACfR9LCB3czPJb5jEADN9jmgQqt 0AUAoL1QiioMB9WWEpjlmKHtYidpy2Qx =Fn/S -----END PGP SIGNATURE----- --PEIAKu/WMn1b1Hv9--
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