Date: Tue, 3 Aug 2010 12:07:12 +0100 From: Anton Shterenlikht <mexas@bristol.ac.uk> To: freebsd-current@freebsd.org Subject: Fatal trap 12: page fault while in kernel mode, Stopped at _mtx_lock_spin_failed+0x2f: movl 0x78(%r12),%r8d Message-ID: <20100803110711.GA37973@mech-cluster241.men.bris.ac.uk>
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On amd64 r210786 booting kernel with iwn(4) I get this fatal trap (copied by hand) : *skip* acpi_throttle0: <ACPI CPU Throttling> on cpu0 powernow0: <PowerNow! K8> on cpu0 acpi_throttle1: <ACPI CPU Throttling> on cpu1 acpi_throttle1: failed to attach P_CNT device_attach: acpi_throttle1 attach returned 6 powernow1: <PowerNow! K8> on cpu1 Fatal trap 12: page fault while in kernel mode cpuid = 0; apic id = 00 fault virtual address = 0x20000000178 fault code = supervisor read data, page not present instruction pointer = 0x20:0xffffffff803f2f9f stack pointer = 0x28:0xffffff80000adb10 frame pointer = 0x28:0xffffff80000adb30 code segment = base 0x0, limit 0xfffff, type 0x1b = DPL 0, pres 1, long 1, def32 0, gran 1 processor eflags = interrupt enabled, resume, IOPL = 0 current process = 0 (bwi0 taskq) [ thread pid 0 tid 100026 ] Stopped at _mtx_lock_spin_failed+0x2f: movl 0x78(%r12),%r8d db> bt Tracing pid 0 tid 100026 td 0xffffff000251d880 _mtx_lock_spin_failed() at _mtx_lock_spin_failed+0x2f _mtx_lock_spin() at _mtx_lock_spin+0x9e _mtx_lock_spin_flags() at _mtx_lock_spin_flags+0x115 taskqueue_thread_loop() at taskqueue_thread_loop_0x3f fork_exit() at fork_exit+0x12a fork_trampoline() at fork_trampoline+0xe --- trap 0, rip = 0, rsp = 0xffffff80000adcf0, rbp = 0 --- db> many thanks anton -- Anton Shterenlikht Room 2.6, Queen's Building Mech Eng Dept Bristol University University Walk, Bristol BS8 1TR, UK Tel: +44 (0)117 331 5944 Fax: +44 (0)117 929 4423
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