Details
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Bug
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Resolution: Fixed
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Major
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None
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None
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3
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9223372036854775807
Description
After adding fallocate call to racer the following crash is observed very often:
[ 156.954031] LustreError: 4652:0:(osc_cache.c:1141:osc_extent_make_ready()) ASSERTION( last_oap_count > 0 ) failed: last_oap_count 0 [ 156.956535] LustreError: 4652:0:(osc_cache.c:1141:osc_extent_make_ready()) LBUG [ 156.957881] Pid: 4652, comm: ldlm_bl_01 3.10.0-7.9-debug #1 SMP Mon Feb 1 17:33:41 EST 2021 [ 156.959725] Call Trace: [ 156.960375] [<ffffffffa017873c>] libcfs_call_trace+0x8c/0xc0 [libcfs] [ 156.962003] [<ffffffffa0178a5c>] lbug_with_loc+0x4c/0xa0 [libcfs] [ 156.963391] [<ffffffffa0839b26>] osc_extent_make_ready+0xb66/0xe60 [osc] [ 156.965016] [<ffffffffa083c383>] osc_io_unplug0+0xee3/0x1900 [osc] [ 156.966261] [<ffffffffa0840a60>] osc_cache_writeback_range+0x9a0/0xfd0 [osc] [ 156.968027] [<ffffffffa082b985>] osc_lock_flush+0x195/0x290 [osc] [ 156.969414] [<ffffffffa082be58>] osc_ldlm_blocking_ast+0x2f8/0x3e0 [osc] [ 156.970970] [<ffffffffa05bbe54>] ldlm_cancel_callback+0x84/0x320 [ptlrpc] [ 156.972552] [<ffffffffa05d4011>] ldlm_cli_cancel_local+0xd1/0x420 [ptlrpc] [ 156.974515] [<ffffffffa05da24c>] ldlm_cli_cancel+0x10c/0x560 [ptlrpc] [ 156.976004] [<ffffffffa082bcda>] osc_ldlm_blocking_ast+0x17a/0x3e0 [osc] [ 156.977297] [<ffffffffa05e6435>] ldlm_handle_bl_callback+0xc5/0x3e0 [ptlrpc] [ 156.978932] [<ffffffffa05e6d0f>] ldlm_bl_thread_main+0x5bf/0xae0 [ptlrpc] [ 156.980417] [<ffffffff810ba124>] kthread+0xe4/0xf0 [ 156.981842] [<ffffffff817eee5d>] ret_from_fork_nospec_begin+0x7/0x21 [ 156.983639] [<ffffffffffffffff>] 0xffffffffffffffff [ 156.984738] Kernel panic - not syncing: LBUG
This is result of wrong assumption about fallocate range over file range. It is done too early in ll_fallocate() so pending write/truncate may change file size and fallocate could change file size wrongly
Attachments
Issue Links
- is related to
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LU-14287 Add 'fallocate' to racer
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- Resolved
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Activity
| Fix Version/s | New: Lustre 2.15.0 [ 14791 ] | |
| Resolution | New: Fixed [ 1 ] | |
| Status | Original: Open [ 1 ] | New: Resolved [ 5 ] |
| Description |
Original:
After adding fallocate call to racer the following crash is observe very often:
{code} [ 156.954031] LustreError: 4652:0:(osc_cache.c:1141:osc_extent_make_ready()) ASSERTION( last_oap_count > 0 ) failed: last_oap_count 0 [ 156.956535] LustreError: 4652:0:(osc_cache.c:1141:osc_extent_make_ready()) LBUG [ 156.957881] Pid: 4652, comm: ldlm_bl_01 3.10.0-7.9-debug #1 SMP Mon Feb 1 17:33:41 EST 2021 [ 156.959725] Call Trace: [ 156.960375] [<ffffffffa017873c>] libcfs_call_trace+0x8c/0xc0 [libcfs] [ 156.962003] [<ffffffffa0178a5c>] lbug_with_loc+0x4c/0xa0 [libcfs] [ 156.963391] [<ffffffffa0839b26>] osc_extent_make_ready+0xb66/0xe60 [osc] [ 156.965016] [<ffffffffa083c383>] osc_io_unplug0+0xee3/0x1900 [osc] [ 156.966261] [<ffffffffa0840a60>] osc_cache_writeback_range+0x9a0/0xfd0 [osc] [ 156.968027] [<ffffffffa082b985>] osc_lock_flush+0x195/0x290 [osc] [ 156.969414] [<ffffffffa082be58>] osc_ldlm_blocking_ast+0x2f8/0x3e0 [osc] [ 156.970970] [<ffffffffa05bbe54>] ldlm_cancel_callback+0x84/0x320 [ptlrpc] [ 156.972552] [<ffffffffa05d4011>] ldlm_cli_cancel_local+0xd1/0x420 [ptlrpc] [ 156.974515] [<ffffffffa05da24c>] ldlm_cli_cancel+0x10c/0x560 [ptlrpc] [ 156.976004] [<ffffffffa082bcda>] osc_ldlm_blocking_ast+0x17a/0x3e0 [osc] [ 156.977297] [<ffffffffa05e6435>] ldlm_handle_bl_callback+0xc5/0x3e0 [ptlrpc] [ 156.978932] [<ffffffffa05e6d0f>] ldlm_bl_thread_main+0x5bf/0xae0 [ptlrpc] [ 156.980417] [<ffffffff810ba124>] kthread+0xe4/0xf0 [ 156.981842] [<ffffffff817eee5d>] ret_from_fork_nospec_begin+0x7/0x21 [ 156.983639] [<ffffffffffffffff>] 0xffffffffffffffff [ 156.984738] Kernel panic - not syncing: LBUG {code} |
New:
After adding fallocate call to racer the following crash is observed very often:
{code:java} [ 156.954031] LustreError: 4652:0:(osc_cache.c:1141:osc_extent_make_ready()) ASSERTION( last_oap_count > 0 ) failed: last_oap_count 0 [ 156.956535] LustreError: 4652:0:(osc_cache.c:1141:osc_extent_make_ready()) LBUG [ 156.957881] Pid: 4652, comm: ldlm_bl_01 3.10.0-7.9-debug #1 SMP Mon Feb 1 17:33:41 EST 2021 [ 156.959725] Call Trace: [ 156.960375] [<ffffffffa017873c>] libcfs_call_trace+0x8c/0xc0 [libcfs] [ 156.962003] [<ffffffffa0178a5c>] lbug_with_loc+0x4c/0xa0 [libcfs] [ 156.963391] [<ffffffffa0839b26>] osc_extent_make_ready+0xb66/0xe60 [osc] [ 156.965016] [<ffffffffa083c383>] osc_io_unplug0+0xee3/0x1900 [osc] [ 156.966261] [<ffffffffa0840a60>] osc_cache_writeback_range+0x9a0/0xfd0 [osc] [ 156.968027] [<ffffffffa082b985>] osc_lock_flush+0x195/0x290 [osc] [ 156.969414] [<ffffffffa082be58>] osc_ldlm_blocking_ast+0x2f8/0x3e0 [osc] [ 156.970970] [<ffffffffa05bbe54>] ldlm_cancel_callback+0x84/0x320 [ptlrpc] [ 156.972552] [<ffffffffa05d4011>] ldlm_cli_cancel_local+0xd1/0x420 [ptlrpc] [ 156.974515] [<ffffffffa05da24c>] ldlm_cli_cancel+0x10c/0x560 [ptlrpc] [ 156.976004] [<ffffffffa082bcda>] osc_ldlm_blocking_ast+0x17a/0x3e0 [osc] [ 156.977297] [<ffffffffa05e6435>] ldlm_handle_bl_callback+0xc5/0x3e0 [ptlrpc] [ 156.978932] [<ffffffffa05e6d0f>] ldlm_bl_thread_main+0x5bf/0xae0 [ptlrpc] [ 156.980417] [<ffffffff810ba124>] kthread+0xe4/0xf0 [ 156.981842] [<ffffffff817eee5d>] ret_from_fork_nospec_begin+0x7/0x21 [ 156.983639] [<ffffffffffffffff>] 0xffffffffffffffff [ 156.984738] Kernel panic - not syncing: LBUG {code} This is result of wrong assumption about fallocate range over file range. It is done too early in {{ll_fallocate()}} so pending write/truncate may change file size and fallocate could change file size wrongly |