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  1. Lustre
  2. LU-2789

lod_load_striping()) ASSERTION( lo->ldo_stripenr == 0 ) failed

    Details

    • Type: Bug
    • Status: Closed
    • Priority: Critical
    • Resolution: Fixed
    • Affects Version/s: Lustre 2.4.0, Lustre 2.5.0
    • Fix Version/s: Lustre 2.4.0
    • Labels:
    • Severity:
      3
    • Rank (Obsolete):
      6755

      Description

      This could probably be reproduced by racer given enough runs but I can reproduce it as follows:

      # llmount.sh
      # mount n@tcp:/lustre /mnt/lustre2 -t lustre
      # (cd /mnt/lustre; while true; do lfs setstripe -c 1 f0; done) &
      # (cd /mnt/lustre2; while true; do mv f0 f1; done) &
      
      Message from syslogd@n at Feb  8 15:36:51 ...
       kernel:LustreError: 3186:0:(lod_lov.c:782:lod_load_striping()) ASSERTION( lo->ldo_stripe[i] ) failed: stripe 0 is NULL
      
      Message from syslogd@n at Feb  8 15:36:51 ...
       kernel:LustreError: 3186:0:(lod_lov.c:782:lod_load_striping()) LBUG
      
      Message from syslogd@n at Feb  8 15:36:51 ...
       kernel:Kernel panic - not syncing: LBUG
      

      Here is the crash dump for the rename handler:

      crash> bt -l
      PID: 13628  TASK: ffff8800a98a1540  CPU: 1   COMMAND: "mdt00_001"
       #0 [ffff8800a98a3828] machine_kexec at ffffffff81031f7b
          /usr/src/debug/kernel-2.6.32-279.19.1.el6/linux-2.6.32-279.19.1.el6.x86_64/arch/x86/kernel/machine_kexec_64.c: 336
       #1 [ffff8800a98a3888] crash_kexec at ffffffff810b8c22
          /usr/src/debug/kernel-2.6.32-279.19.1.el6/linux-2.6.32-279.19.1.el6.x86_64/kernel/kexec.c: 1106
       #2 [ffff8800a98a3958] panic at ffffffff814e9818
          /usr/src/debug/kernel-2.6.32-279.19.1.el6/linux-2.6.32-279.19.1.el6.x86_64/kernel/panic.c: 103
       #3 [ffff8800a98a39d8] lbug_with_loc at ffffffffa0595eeb [libcfs]
          /root/lustre-release/libcfs/libcfs/linux/linux-debug.c: 188
       #4 [ffff8800a98a39f8] lod_load_striping at ffffffffa0e199f3 [lod]
          /root/lustre-release/lustre/lod/lod_internal.h: 255
       #5 [ffff8800a98a3a38] lod_declare_attr_set at ffffffffa0e25fbb [lod]
          /root/lustre-release/lustre/lod/lod_object.c: 300
       #6 [ffff8800a98a3a88] mdd_rename at ffffffffa0beb6d8 [mdd]
          /root/lustre-release/lustre/mdd/mdd_dir.c: 2087
       #7 [ffff8800a98a3ba8] mdt_reint_rename at ffffffffa0d54617 [mdt]
          /root/lustre-release/lustre/mdt/mdt_reint.c: 1270
       #8 [ffff8800a98a3cc8] mdt_reint_rec at ffffffffa0d506b1 [mdt]
          /root/lustre-release/libcfs/include/libcfs/libcfs_debug.h: 211
       #9 [ffff8800a98a3ce8] mdt_reint_internal at ffffffffa0d49d13 [mdt]
          /root/lustre-release/libcfs/include/libcfs/libcfs_debug.h: 211
      #10 [ffff8800a98a3d28] mdt_reint at ffffffffa0d4a044 [mdt]
          /root/lustre-release/lustre/mdt/mdt_handler.c: 1818
      #11 [ffff8800a98a3d48] mdt_handle_common at ffffffffa0d3afb8 [mdt]
          /root/lustre-release/lustre/mdt/mdt_handler.c: 2981
      #12 [ffff8800a98a3d98] mds_regular_handle at ffffffffa0d725f5 [mdt]
          /root/lustre-release/lustre/mdt/mdt_mds.c: 354
      #13 [ffff8800a98a3da8] ptlrpc_server_handle_request at ffffffffa08e9c7c [ptlrpc]
          /root/lustre-release/lustre/include/lustre_net.h: 2771
      #14 [ffff8800a98a3ea8] ptlrpc_main at ffffffffa08eb1c6 [ptlrpc]
          /root/lustre-release/lustre/ptlrpc/service.c: 2487
      #15 [ffff8800a98a3f48] kernel_thread at ffffffff8100c0ca
          /usr/src/debug///////kernel-2.6.32-279.19.1.el6/linux-2.6.32-279.19.1.el6.x86_64/arch/x86/kernel/entry_64.S: 1213
      

      lfs setstripe is in ioctl() with its mdt_reint_open() handler in:

      mdt_reint_open()
       ...
        mdt_create_data()
         ...
          lod_declare_xattr_set()
           ...
            osp_precreate_reserve()
      

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              • Assignee:
                jhammond John Hammond
                Reporter:
                jhammond John Hammond
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                Dates

                • Created:
                  Updated:
                  Resolved: