On Wednesday 11 August 2004 04:52 am, Peter Holm wrote: > While stress testing with kern.threads.virtual_cpu=256 I got this > fault after a kill -9 of a hung test program. Do you have PREEMPTION turned on? This is the same type of bug that people were seeing with PREEMPTION turned on. > GDB: no debug ports present > KDB: debugger backends: ddb > KDB: current backend: ddb > Copyright (c) 1992-2004 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 5.2-CURRENT #0: Wed Aug 11 04:23:56 CEST 2004 > root_at_peter.osted.lan:/usr/src/sys/i386/compile/PHO > WARNING: WITNESS option enabled, expect reduced performance. > ACPI APIC Table: <A M I OEMAPIC > > Timecounter "i8254" frequency 1193182 Hz quality 0 > CPU: Intel(R) Celeron(R) CPU 1.80GHz (1799.14-MHz 686-class CPU) > Origin = "GenuineIntel" Id = 0xf13 Stepping = 3 > > Features=0x3febfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MC >A,CMOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM> real memory > = 267583488 (255 MB) > avail memory = 252190720 (240 MB) > > ata1-master: DMA limited to UDMA33, non-ATA66 cable or device > acd0: CDROM <SONY CD-ROM CDU5261/C200SNS> at ata1-master UDMA33 > Mounting root from ufs:/dev/ad0s1a > kernel trap 12 with interrupts disabled > > > Fatal trap 12: page fault while in kernel mode > cpuid = 0; apic id = 00 > fault virtual address = 0x54 > fault code = supervisor write, page not present > instruction pointer = 0x8:0xc066ab08 > stack pointer = 0x10:0xd25c1c50 > frame pointer = 0x10:0xd25c1c70 > code segment = base 0x0, limit 0xfffff, type 0x1b > = DPL 0, pres 1, def32 1, gran 1 > processor eflags = resume, IOPL = 0 > current process = 539 (pthread_setconcurre) > [thread 101883] > Stopped at setrunqueue+0x1e8: movl %edi,0x54(%edx) > db> where > setrunqueue(c1bac2c0,c1a957d0,c08b1292,484,c065038e) at setrunqueue+0x1e8 > sched_switch(c1bac2c0,0,c08b06b2,123,d3526cf3) at sched_switch+0xa4 > mi_switch(2,0,c08b2b56,f5,10000) at mi_switch+0x29f > ast(d25c1d48) at ast+0x3fb > doreti_ast() at doreti_ast+0x17 > db> call doadump > Dumping 255 MB > panic: blockable sleep lock (sleep mutex) taskqueue _at_ > kern/subr_taskqueue.c:132 cpuid = 0; > Uptime: 34m36s > panic: cv_wait: not TDS_RUNNING > cpuid = 0; > KDB: enter: panic > [thread 101883] > Stopped at kdb_enter+0x30: leave > db> > > (kgdb) l *0xc066ab08 > 0xc066ab08 is in setrunqueue (../../../kern/kern_switch.c:436). > 431 * put the new kse on whatever is next, > 432 * which may or may not be us. > 433 */ > 434 td2 = TAILQ_NEXT(tda, td_runq); > 435 kg->kg_last_assigned = td2; > 436 td2->td_kse = ke; > 437 ke->ke_thread = td2; > 438 } > 439 sched_add(ke->ke_thread); > 440 } else { > (kgdb) -- John Baldwin <jhb_at_FreeBSD.org> <>< http://www.FreeBSD.org/~jhb/ "Power Users Use the Power to Serve!" - http://www.FreeBSD.org/Received on Wed Aug 11 2004 - 17:05:32 UTC
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