[LU-17639] Trace cpu data (tcd) not initialized correctly

• Type: Bug
• Resolution: Unresolved
• Priority: Minor
• Fix Version/s: Lustre 2.17.0
• Affects Version/s: Lustre 2.15.0

Epic/Theme

lnet

• Severity: 3
• Assignee: James A Simmons
• Reporter: Frank Sehr

Description

modprobe causes following core

PID: 283791   TASK: ffff96ad444e5640  CPU: 1    COMMAND: "modprobe"
 #0 [ffffbb30822cf960] machine_kexec at ffffffff94a77167
 #1 [ffffbb30822cf9b8] __crash_kexec at ffffffff94bea45a
 #2 [ffffbb30822cfa78] crash_kexec at ffffffff94beb6e8
 #3 [ffffbb30822cfa80] oops_end at ffffffff94a2e4db
 #4 [ffffbb30822cfaa0] page_fault_oops at ffffffff94a88d0b
 #5 [ffffbb30822cfaf8] exc_page_fault at ffffffff95654602
 #6 [ffffbb30822cfb20] asm_exc_page_fault at ffffffff95800bc2
    [exception RIP: cfs_trace_lock_tcd+9]
    RIP: ffffffffc0ba3a69  RSP: ffffbb30822cfbd0  RFLAGS: 00010282
    RAX: 0000000000000080  RBX: 0000000000000080  RCX: 0000000000000000
    RDX: 0000000080000000  RSI: 0000000000000000  RDI: 0000000000000080
    RBP: ffffbb30822cfd00   R8: ffffffffc0c51850   R9: 0000000000000010
    R10: ffffbb30822cfd20  R11: 0000000000000000  R12: ffffffffc0c9bb80
    R13: ffffffffc0c51851  R14: 0000000000000000  R15: 0000000000000080
    ORIG_RAX: ffffffffffffffff  CS: 0010  SS: 0018
 #7 [ffffbb30822cfbd8] libcfs_debug_msg at ffffffffc0ba49a6 [libcfs]
 #8 [ffffbb30822cfd18] _MODULE_INIT_START_lnet at ffffffffc0ccf073 [lnet]
 #9 [ffffbb30822cfd28] do_one_initcall at ffffffff94a01374
#10 [ffffbb30822cfd90] do_init_module at ffffffff94be57bc
#11 [ffffbb30822cfdb0] __do_sys_finit_module at ffffffff94be73ce
#12 [ffffbb30822cfe70] do_syscall_64 at ffffffff9565018c
#13 [ffffbb30822cff50] entry_SYSCALL_64_after_hwframe at ffffffff958000ea
    RIP: 00007fd8bee3ee5d  RSP: 00007ffdc1206ce8  RFLAGS: 00000246
    RAX: ffffffffffffffda  RBX: 0000555564dfdfc0  RCX: 00007fd8bee3ee5d
    RDX: 0000000000000000  RSI: 0000555564dfe850  RDI: 0000000000000000
    RBP: 0000000000040000   R8: 0000000000000000   R9: 0000000000000004
    R10: 0000000000000000  R11: 0000000000000246  R12: 0000555564dfe850
    R13: 0000555564dfdf60  R14: 0000555564dfdfc0  R15: 0000555564dfe890
    ORIG_RAX: 0000000000000139  CS: 0033  SS: 002b

 

An additional dis shows for _MODULE_INIT_START_lnet

0xffffffffc0ccf073 <_MODULE_INIT_START_lnet+115>:       call   0xffffffffc0ba3090 <libcfs_setup>

Issue Links

• is related to: LU-14428 Convert tracefile to use ring_buffer from linux