>> >> crash> bt 30444 >> >> PID: 30444 TASK: ffff8820454e9520 CPU: 19 COMMAND: "python" >> >> #0 [ffff88203de8b4f0] machine_kexec at ffffffff8103d1ab >> >> #1 [ffff88203de8b550] crash_kexec at ffffffff810cc4a2 >> >> #2 [ffff88203de8b620] oops_end at ffffffff8153d540 >> >> #3 [ffff88203de8b650] no_context at ffffffff8104e8cb >> >> #4 [ffff88203de8b6a0] __bad_area_nosemaphore at ffffffff8104eb55 >> >> #5 [ffff88203de8b6f0] bad_area at ffffffff8104ec7e >> >> #6 [ffff88203de8b720] __do_page_fault at ffffffff8104f483 >> >> #7 [ffff88203de8b840] do_page_fault at ffffffff8153f48e >> >> #8 [ffff88203de8b870] page_fault at ffffffff8153c835 [exception RIP: list_del+27] RIP: ffffffff812a3f8b RSP: ffff88203de8b928 RFLAGS: 00010046 RAX: 0000000000000006 RBX: ffffea006f040028 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffea006f040028 RBP: ffff88203de8b938 R8: ffffea006f040028 R9: 0000000000000000 R10: 0000000000000000 R11: 000000000000000a R12: 0000000000000000 R13: ffff880000021de8 R14: 0000000000000020 R15: ffff880000019d80 ORIG_RAX: ffffffffffffffff CS: 0010 SS: 0000 >> >> #9 [ffff88203de8b940] __rmqueue at ffffffff811336c3 >> >> #10 [ffff88203de8b9e0] get_page_from_freelist at ffffffff81135350 >> >> #11 [ffff88203de8bb10] __alloc_pages_nodemask at ffffffff81136ff9 >> >> #12 [ffff88203de8bc60] alloc_pages_vma at ffffffff8117068a >> >> #13 [ffff88203de8bcb0] handle_pte_fault at ffffffff81152afd >> >> #14 [ffff88203de8bd90] handle_mm_fault at ffffffff81153179 >> >> #15 [ffff88203de8be00] __do_page_fault at ffffffff8104f156 >> >> #16 [ffff88203de8bf20] do_page_fault at ffffffff8153f48e >> >> #17 [ffff88203de8bf50] page_fault at ffffffff8153c835 Hi, everyone, this is the backtrace from the vmcore in my server. I remember there are some important functions between #13 ( handle_pte_fault ) and #12( handle_pte_fault ), like do_linear_fault(), do_nolinear_fault(), do_swap_page(), do_wp_page(). Why these functions cannot be printed in the backtrace? Is the compiler optimized for these functions？If so,how can I make sure the accurate function execution path. By the way, the crash version is crash 7.1.0-6.el6, and I use the centos-6.7 in my server.

Thanks, Wind -- Crash-utility mailing list Crash-utility(a)redhat.com https://www.redhat.com/mailman/listinfo/crash-utility