From owner-freebsd-bugs@FreeBSD.ORG Mon Jun 28 20:30:32 2004 Return-Path: Delivered-To: freebsd-bugs@hub.freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 78B7716A4CE for ; Mon, 28 Jun 2004 20:30:32 +0000 (GMT) Received: from freefall.freebsd.org (freefall.freebsd.org [216.136.204.21]) by mx1.FreeBSD.org (Postfix) with ESMTP id 6FD1043D58 for ; Mon, 28 Jun 2004 20:30:32 +0000 (GMT) (envelope-from gnats@FreeBSD.org) Received: from freefall.freebsd.org (gnats@localhost [127.0.0.1]) by freefall.freebsd.org (8.12.11/8.12.11) with ESMTP id i5SKUUZL078471 for ; Mon, 28 Jun 2004 20:30:30 GMT (envelope-from gnats@freefall.freebsd.org) Received: (from gnats@localhost) by freefall.freebsd.org (8.12.11/8.12.11/Submit) id i5SKUUc5078470; Mon, 28 Jun 2004 20:30:30 GMT (envelope-from gnats) Date: Mon, 28 Jun 2004 20:30:30 GMT Message-Id: <200406282030.i5SKUUc5078470@freefall.freebsd.org> To: freebsd-bugs@FreeBSD.org From: Daniel Lang Subject: Re: kern/68442: panic - acquiring duplicate lock of same type: "sleepq chain" X-BeenThere: freebsd-bugs@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list Reply-To: Daniel Lang List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 28 Jun 2004 20:30:32 -0000 The following reply was made to PR kern/68442; it has been noted by GNATS. From: Daniel Lang To: freebsd-gnats-submit@FreeBSD.org, dl@leo.org Cc: Subject: Re: kern/68442: panic - acquiring duplicate lock of same type: "sleepq chain" Date: Mon, 28 Jun 2004 22:24:34 +0200 Ok, the problem occurs also with:=20 - non PAE kernel (use the same kernel config without the PAE part, which includes the other=20 - completeley changed RAM, which was known to work before (I did a system upgrade in between) I could get some more data and a ddb stacktrace. I could not get gdb to analyse it, although I could obtain a dump, because /var was too full, so it was not saved. :( I usually get no ddb prompt and no crash dump, so this was a rare occasion :(( Here is what I got: [..] login: lock order reversal 1st 0x80746940 sio (sio) @ /usr/src/sys/dev/sio/sio.c:3220 2nd 0x807105b4 sleepq chain (sleepq chain) @ /usr/src/sys/kern/subr_sleepq= ueue3 Stack backtrace: backtrace(ffffffff,80713568,80713590,806e31a4,807365dc) at 0x8051e012 =3D b= acktra2 witness_checkorder(807105b4,9,8069fdd9,c1,1310) at 0x80539428 =3D witness_c= heckor4 _mtx_lock_spin_flags(807105b4,0,8069fdd9,c1,83fee000) at 0x80516e4a =3D _mt= x_locke sleepq_lookup(86ea7ad8,86ea7aa8,100,86ea7aa8,7d7) at 0x8053673a =3D sleepq_= lookupe msleep(86ea7ad8,86ea7aa8,158,806a2582,0) at 0x8052357a =3D msleep+0xa6 sbwait(86ea7a94,0,1235,0,0) at 0x8054fbaf =3D sbwait+0x33 do_sendfile(83f9b540,ab0a9d14,0,ab0a9d40,80665343) at 0x80553afd =3D do_sen= dfile+5 sendfile(83f9b540,ab0a9d14,8,a9,202) at 0x80552e9c =3D sendfile+0x10 syscall(2f,2f,7fbf002f,8,0) at 0x80665343 =3D syscall+0x217 Xint0x80_syscall() at 0x8065467f =3D Xint0x80_syscall+0x1f --- syscall (393), eip =3D 0x2812123b, esp =3D 0x7fbfde4c, ebp =3D 0x7fbfde= a8 --- Fatal trap 12: page fault while in kernel mode cpuid =3D 1; apic id =3D 06 fault virtual address =3D 0x34 fault code =3D supervisor read, page not present instruction pointer =3D 0x8:0x805390fa stack pointer =3D 0x10:0xaae8eb1c frame pointer =3D 0x10:0xaae8eb40 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 6196 (ftpd) kernel: type 12 trap, code=3D0 Stopped at 0x805390fa =3D witness_checkorder+0x176: movl 0x34(%eax= ),%edx db> db> trace witness_checkorder(8071021c,9,8069fdd9,c1,f78) at 0x805390fa =3D witness_ch= eckord6 _mtx_lock_spin_flags(8071021c,0,8069fdd9,c1,83e78e70) at 0x80516e4a =3D _mt= x_locke sleepq_lookup(87a86370,86a5a904,0,8069fdd9,145) at 0x8053673a =3D sleepq_lo= okup+0e sleepq_catch_signals(87a86370,0,100,0,806a2729) at 0x805369cd =3D sleepq_ca= tch_sid msleep(87a86370,87a86340,158,806a2582,0) at 0x80523707 =3D msleep+0x233 sbwait(87a8632c,0,1ac6,0,0) at 0x8054fbaf =3D sbwait+0x33 do_sendfile(83e78e70,aae8ed14,0,aae8ed40,80665343) at 0x80553afd =3D do_sen= dfile+5 sendfile(83e78e70,aae8ed14,8,9,202) at 0x80552e9c =3D sendfile+0x10 syscall(7fbf002f,7fbf002f,7fbf002f,7,0) at 0x80665343 =3D syscall+0x217 Xint0x80_syscall() at 0x8065467f =3D Xint0x80_syscall+0x1f --- syscall (393, FreeBSD ELF32, sendfile), eip =3D 0x2812123b, esp =3D 0x7= fbfde4c,- Hope this helps. Cheers, Daniel --=20 IRCnet: Mr-Spock - signs of absurd developments in the net community:=20 #42: - "Wurstbrot gehoert m.E. zum Fruehstuecks-botnet von Cartoon" - =20 Daniel Lang * dl@leo.org * +49 89 289 18532 * http://www.leo.org/~dl/