On Thursday 02 September 2004 11:59 am, Ken Smith wrote: > > * --- > > Fatal trap 12: page fault while in kernel mode > > fault virtual address = 0x104 > > fault code = supervisor read, page not present > > instruction pointer = 0x8:0xc058a8cf > > stack pointer = 0x10:0xdcb34cc4 > > frame pointer = 0x10:0xdcb34cec > > code segment = base 0x0, limit 0xfffff, type 0x1b > > = DPL 0, pres 1, def32 1, gran 1 > > processor eflags = resume, IOPL = 0 > > current process = 50 (schedcpu) > > trap number = 12 > > panic: page fault > > > > syncing disks, buffers remaining... panic: mi_switch: switch in a > > critical section > > > > addr2line says the panic was in kern/sched_4bsd.c:327 > > > > /* > > * The kse slptimes are not touched in > > wakeup * because the thread may not HAVE a KSE. */ > > if (ke->ke_state == KES_ONRUNQ) { > > awake = 1; > > ke->ke_flags &= ~KEF_DIDRUN; > > ---> } else if ((ke->ke_state == KES_THREAD) > > && (TD_IS_RUNNING(ke->ke_thread))) { awake = 1; > > > > gdb -k got confused and couldn't make anything out of the backtrace. > > The code you quote above hasn't changed recently but a few kse related > fixes have gone in recently if I recall correctly. Is this one still > biting you? This seems to be a symptom of the same bug that causes runq corruption when PREEMPTION is turned on. I think it might have triggered on SMP w/o PREEMPTION turned on however. -- John Baldwin <jhb_at_FreeBSD.org> <>< http://www.FreeBSD.org/~jhb/ "Power Users Use the Power to Serve" = http://www.FreeBSD.orgReceived on Thu Sep 02 2004 - 19:21:40 UTC
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