PID: 8099   TASK: ffff88012e1ee660  CPU: 0   COMMAND: "ldlm_cb00_001"
 #0 [ffff8800a59378b8] machine_kexec at ffffffff810613ae
    /home/green/bk/linux-3.10.0-1160.59.1.el7-debug/arch/x86/kernel/machine_kexec_64.c: 343
 #1 [ffff8800a5937918] __crash_kexec at ffffffff811160a2
    /home/green/bk/linux-3.10.0-1160.59.1.el7-debug/kernel/kexec_core.c: 897
 #2 [ffff8800a59379e8] crash_kexec at ffffffff81116190
    /home/green/bk/linux-3.10.0-1160.59.1.el7-debug/./arch/x86/include/asm/atomic.h: 37
 #3 [ffff8800a5937a00] oops_end at ffffffff817eb798
    /home/green/bk/linux-3.10.0-1160.59.1.el7-debug/arch/x86/kernel/dumpstack.c: 201
 #4 [ffff8800a5937a28] no_context at ffffffff810708c4
    /home/green/bk/linux-3.10.0-1160.59.1.el7-debug/arch/x86/mm/fault.c: 770
 #5 [ffff8800a5937a78] __bad_area_nosemaphore at ffffffff81070b92
    /home/green/bk/linux-3.10.0-1160.59.1.el7-debug/arch/x86/mm/fault.c: 852
 #6 [ffff8800a5937ac8] bad_area_nosemaphore at ffffffff81070cb4
    /home/green/bk/linux-3.10.0-1160.59.1.el7-debug/arch/x86/mm/fault.c: 859
 #7 [ffff8800a5937ad8] __do_page_fault at ffffffff817ee7d8
    /home/green/bk/linux-3.10.0-1160.59.1.el7-debug/arch/x86/mm/fault.c: 1359
 #8 [ffff8800a5937b40] trace_do_page_fault at ffffffff817eea76
    /home/green/bk/linux-3.10.0-1160.59.1.el7-debug/arch/x86/mm/fault.c: 1396
 #9 [ffff8800a5937b80] do_async_page_fault at ffffffff817edfe2
    /home/green/bk/linux-3.10.0-1160.59.1.el7-debug/arch/x86/kernel/kvm.c: 289
#10 [ffff8800a5937ba0] async_page_fault at ffffffff817ea7a8
    /home/green/bk/linux-3.10.0-1160.59.1.el7-debug/arch/x86/kernel/entry_64.S: 1432
    [exception RIP: mgc_barrier_glimpse_ast+44]
    RIP: ffffffffa0b11e1c  RSP: ffff8800a5937c50  RFLAGS: 00010246
    RAX: 00000000ffffffda  RBX: 0000000000000000  RCX: 0000000000000000
    RDX: ffffffffa0b11df0  RSI: ffff88012cfb1c00  RDI: ffff8800b5378240
    RBP: ffff8800a5937c60   R8: 000000000000ffff   R9: 000000000000ffff
    R10: 0000000000000000  R11: ffff8800a59378f6  R12: ffff88012cfb1c00
    R13: ffff88008cb52408  R14: ffff8800a508dc00  R15: ffff8800b5378240
    ORIG_RAX: ffffffffffffffff  CS: 0010  SS: 0018
    /home/green/git/lustre-release/lustre/mgc/mgc_request_server.c: 496
#11 [ffff8800a5937c68] ldlm_callback_handler at ffffffffa0881871 [ptlrpc]
    /home/green/git/lustre-release/lustre/ptlrpc/../../lustre/ldlm/ldlm_lockd.c: 2140
#12 [ffff8800a5937ce8] ldlm_callback_handler at ffffffffa0882cda [ptlrpc]
    /home/green/git/lustre-release/lustre/ptlrpc/../../lustre/ldlm/ldlm_lockd.c: 2545
#13 [ffff8800a5937d00] ptlrpc_server_handle_request at ffffffffa080eb61 [ptlrpc]
    /home/green/git/lustre-release/lustre/include/lustre_net.h: 2436
#14 [ffff8800a5937db8] ptlrpc_main at ffffffffa081094e [ptlrpc]
    /home/green/git/lustre-release/lustre/ptlrpc/service.c: 2927
#15 [ffff8800a5937ea8] kthread at ffffffff810ba114
    /home/green/bk/linux-3.10.0-1160.59.1.el7-debug/kernel/kthread.c: 202
#16 [ffff8800a5937f50] ret_from_fork_nospec_begin at ffffffff817f3e5d
    /home/green/bk/linux-3.10.0-1160.59.1.el7-debug/arch/x86/kernel/entry_64.S: 418