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  1. Lustre
  2. LU-3650

osc_ldlm_blocking_ast() LBUG

    Details

    • Severity:
      3
    • Rank (Obsolete):
      9393

      Description

      We are hitting the LBUG in osc_ldlm_blocking_ast() that says "This should never happen". The backtrace looks like:

      PID: 29660  TASK: c00000098d26bab0  CPU: 42  COMMAND: "ldlm_bl_44"
       #0 [c000000dc9f3f7c0] .crash_kexec at c0000000000e5aa4
       #1 [c000000dc9f3f9c0] .panic at c0000000005c4f40
       #2 [c000000dc9f3fa50] .lbug_with_loc at d00000000acd14e0 [libcfs]
       #3 [c000000dc9f3fae0] .osc_ldlm_blocking_ast at d00000000afbe1d8 [osc]
       #4 [c000000dc9f3fbc0] .ldlm_cancel_callback at d00000000bf3148c [ptlrpc]
       #5 [c000000dc9f3fc60] .ldlm_cli_cancel_local at d00000000bf4db78 [ptlrpc]
       #6 [c000000dc9f3fd20] .ldlm_cli_cancel_list_local at d00000000bf4f80c [ptlrpc]
       #7 [c000000dc9f3fe40] .ldlm_bl_thread_main at d00000000bf5c07c [ptlrpc]
       #8 [c000000dc9f3ff90] .kernel_thread at c000000000032fd4
      

      Both times we have seen this (that I am aware of), the LBUG was preceded shortly before by a kernel page allocation error, so that may be part of the recipe for triggering this bug.

      This is a PPC64 client running lustre 2.4.0-RC1_3chaos.

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            • Assignee:
              laisiyao Lai Siyao
              Reporter:
              morrone Christopher Morrone
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              Dates

              • Created:
                Updated: