Date: Fri, 17 Aug 2012 16:43:30 -0700 From: arvind viswanathan <arvind.viswanathan@gmail.com> To: freebsd-xen@freebsd.org Subject: Further debugging Message-ID: <CAFOzg%2BFHT_YwZH=TohAF-AAxgRu6-Uq2FEGjV5QGkkbcfXgLuQ@mail.gmail.com>
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Hi, I experience a double fault and I dont see a core dump happening. I checked the params for core file generation seem to be fine. Not sure how to collect further information. Any pointers will be helpful. Trying to mount root from ufs:/dev/ad0s1d WARNING: / was not properly dismounted Fatal double fault rip =3D 0xffffffff804c5128 rsp =3D 0xfffffffeb3cb4ff8 rbp =3D 0xfffffffeb3cb5010 cpuid =3D 0; apic id =3D 00 kernel trap 12 with interrupts disabled =FF=FF=FF=FF=D6n=FF=FF=FF=FF) held by 0xffffff0028f0c350 (tid 100022) too l= ong Process name: irq28: xenpci0 Backtrace: kernel trap 12 with interrupts disabled kernel trap 12 with interrupts disabled kernel trap 12 with interrupts disabled kernel trap 12 with interrupts disabled kernel trap 12 with interrupts disabled kernel trap 12 with interrupts disabled kernel trap 12 with interrupts disabled kernel trap 12 with interrupts disabled kernel trap 12 with interrupts disabled With image built using debug kernel, this is where the debugger stopped and backtrace appears as follows: Trying to mount root from ufs:/dev/ad0s1d db> ? Bad character ? db> bt Tracing pid 23 tid 100022 td 0xffffff0028f0c350 kdb_enter() at kdb_enter+0x41 panic() at panic+0x26d _mtx_lock_sleep() at _mtx_lock_sleep+0x181 _mtx_lock_flags() at _mtx_lock_flags+0xa1 trap_pfault() at trap_pfault+0xeb trap() at trap+0x2fa calltrap() at calltrap+0x8 --- trap 0xc, rip =3D 0xffffffff806d0f2d, rsp =3D 0xffffffff9457e3c0, rbp = =3D 0xffffffff9457e3d0 --- ffo_disable_com2() at ffo_disable_com2+0xd panic() at panic+0x230 _mtx_lock_sleep() at _mtx_lock_sleep+0x181 _mtx_lock_flags() at _mtx_lock_flags+0xa1 trap_pfault() at trap_pfault+0xeb trap() at trap+0x2fa calltrap() at calltrap+0x8 --- trap 0xc, rip =3D 0xffffffff806d0f2d, rsp =3D 0xffffffff9457e730, rbp = =3D 0xffffffff9457e740 --- ffo_disable_com2() at ffo_disable_com2+0xd panic() at panic+0x230 _mtx_lock_sleep() at _mtx_lock_sleep+0x181 However this doesnt look like a real reson for faulting Thanks Arvind
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