Reproduced on ubuntu_zfs_stress
- openstack arm64-vm focal:linux-hwe-5.15 generic-64k 5.15.0-199.209~20.04.1

================================= STACK 
===============================================
[ 1330.135514] INFO: task kswapd0:91 blocked for more than 120 seconds.
[ 1330.136252]       Tainted: P           O      5.15.0-139-generic-64k 
#149~20.04.1-Ubuntu
[ 1330.136881] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this 
message.
[ 1330.137492] task:kswapd0         state:D stack:    0 pid:   91 ppid:     2 
flags:0x00000008
[ 1330.137496] Call trace:
[ 1330.137497]  __switch_to+0x100/0x1a0
[ 1330.137571]  __schedule+0x2fc/0x8f0
[ 1330.137574]  schedule+0x64/0x138
[ 1330.137576]  cv_wait_common+0x1c0/0x1c8 [spl]
[ 1330.137590]  __cv_wait+0x20/0x30 [spl]
[ 1330.137599]  dmu_tx_wait+0x124/0x1e0 [zfs]
[ 1330.137690]  zfs_putpage+0x470/0x478 [zfs]
[ 1330.137776]  zpl_putpage+0x48/0x70 [zfs]
[ 1330.137874]  zpl_writepage+0x40/0x50 [zfs]
[ 1330.137957]  pageout+0x1a8/0x398
[ 1330.137959]  shrink_page_list+0xb1c/0xf78
[ 1330.137961]  shrink_inactive_list+0x1c4/0x568
[ 1330.137962]  shrink_lruvec+0x2b8/0x3a8
[ 1330.137964]  shrink_node+0x41c/0x8b8
[ 1330.137965]  balance_pgdat+0x358/0x7e0
[ 1330.137967]  kswapd+0x1d0/0x480
[ 1330.137968]  kthread+0x114/0x120
[ 1330.137972]  ret_from_fork+0x10/0x20
[ 1330.137986] INFO: task kworker/u4:1:8392 blocked for more than 120 seconds.
[ 1330.138542]       Tainted: P           O      5.15.0-139-generic-64k 
#149~20.04.1-Ubuntu
[ 1330.139188] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this 
message.
[ 1330.139843] task:kworker/u4:1    state:D stack:    0 pid: 8392 ppid:     2 
flags:0x00000008
[ 1330.139847] Workqueue: writeback wb_workfn (flush-zfs-62)
[ 1330.139860] Call trace:
[ 1330.139860]  __switch_to+0x100/0x1a0
[ 1330.139863]  __schedule+0x2fc/0x8f0
[ 1330.139865]  schedule+0x64/0x138
[ 1330.139867]  cv_wait_common+0x1c0/0x1c8 [spl]
[ 1330.139878]  __cv_wait+0x20/0x30 [spl]
[ 1330.139887]  dmu_tx_wait+0x124/0x1e0 [zfs]
[ 1330.139970]  zfs_putpage+0x470/0x478 [zfs]
[ 1330.140054]  zpl_putpage+0x48/0x70 [zfs]
[ 1330.140136]  write_cache_pages+0x1b4/0x430
[ 1330.140138]  zpl_writepages+0x9c/0x188 [zfs]
[ 1330.140221]  do_writepages+0x84/0x270
[ 1330.140223]  __writeback_single_inode+0x48/0x3c8
[ 1330.140225]  writeback_sb_inodes+0x260/0x538
[ 1330.140227]  __writeback_inodes_wb+0x68/0x168
[ 1330.140228]  wb_writeback+0x30c/0x400
[ 1330.140230]  wb_workfn+0x36c/0x5b0
[ 1330.140232]  process_one_work+0x200/0x4d8
[ 1330.140235]  worker_thread+0x148/0x558
[ 1330.140237]  kthread+0x114/0x120
[ 1330.140239]  ret_from_fork+0x10/0x20
[ 1330.140246] INFO: task txg_quiesce:61901 blocked for more than 120 seconds.
[ 1330.141303]       Tainted: P           O      5.15.0-139-generic-64k 
#149~20.04.1-Ubuntu
[ 1330.142083] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this 
message.
[ 1330.142714] task:txg_quiesce     state:D stack:    0 pid:61901 ppid:     2 
flags:0x00000008
[ 1330.142717] Call trace:
[ 1330.142718]  __switch_to+0x100/0x1a0
[ 1330.142721]  __schedule+0x2fc/0x8f0
[ 1330.142723]  schedule+0x64/0x138
[ 1330.142725]  cv_wait_common+0x1c0/0x1c8 [spl]
[ 1330.142736]  __cv_wait+0x20/0x30 [spl]
[ 1330.142745]  txg_quiesce+0x17c/0x1f8 [zfs]
[ 1330.142828]  txg_quiesce_thread+0xb4/0x128 [zfs]
[ 1330.142925]  thread_generic_wrapper+0x68/0x80 [spl]
[ 1330.142935]  kthread+0x114/0x120
[ 1330.142937]  ret_from_fork+0x10/0x20
[ 1330.142941] INFO: task stress-ng:62158 blocked for more than 120 seconds.
[ 1330.143539]       Tainted: P           O      5.15.0-139-generic-64k 
#149~20.04.1-Ubuntu
[ 1330.144250] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this 
message.
[ 1330.144906] task:stress-ng       state:D stack:    0 pid:62158 ppid: 62101 
flags:0x00000001
[ 1330.144910] Call trace:
[ 1330.144910]  __switch_to+0x100/0x1a0
[ 1330.144913]  __schedule+0x2fc/0x8f0
[ 1330.144915]  schedule+0x64/0x138
[ 1330.144917]  io_schedule+0x24/0x58
[ 1330.144919]  cv_wait_common+0xd8/0x1c8 [spl]
[ 1330.144928]  __cv_wait_io+0x20/0x30 [spl]
[ 1330.144937]  txg_wait_open+0xa4/0xf8 [zfs]
[ 1330.145020]  dmu_free_long_range_impl+0x2c8/0x380 [zfs]
[ 1330.145101]  dmu_free_long_range+0xa0/0xd0 [zfs]
[ 1330.145182]  zfs_rmnode+0x2bc/0x3a0 [zfs]
[ 1330.145266]  zfs_zinactive+0xf4/0xf8 [zfs]
[ 1330.145349]  zfs_inactive+0x128/0x1f8 [zfs]
[ 1330.145431]  zpl_evict_inode+0x48/0x68 [zfs]
[ 1330.145513]  evict+0x124/0x378
[ 1330.145516]  iput+0x144/0x270
[ 1330.145517]  dentry_unlink_inode+0xd0/0x160
[ 1330.145520]  __dentry_kill+0xd0/0x208
[ 1330.145523]  dput+0x25c/0x480
[ 1330.145525]  __fput+0xd4/0x288
[ 1330.145527]  ____fput+0x18/0x28
[ 1330.145528]  task_work_run+0xc8/0x168
[ 1330.145530]  do_notify_resume+0x298/0x7e8
[ 1330.145531]  el0_svc+0xd8/0x138
[ 1330.145534]  el0t_64_sync_handler+0xb0/0xb8
[ 1330.145535]  el0t_64_sync+0x1a4/0x1a8
[ 1330.145537] INFO: task stress-ng:62160 blocked for more than 120 seconds.
[ 1330.146090]       Tainted: P           O      5.15.0-139-generic-64k 
#149~20.04.1-Ubuntu
[ 1330.146707] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this 
message.
[ 1330.147351] task:stress-ng       state:D stack:    0 pid:62160 ppid: 62101 
flags:0x00000001
[ 1330.147355] Call trace:
[ 1330.147356]  __switch_to+0x100/0x1a0
[ 1330.147358]  __schedule+0x2fc/0x8f0
[ 1330.147360]  schedule+0x64/0x138
[ 1330.147362]  io_schedule+0x24/0x58
[ 1330.147364]  cv_wait_common+0xd8/0x1c8 [spl]
[ 1330.147374]  __cv_wait_io+0x20/0x30 [spl]
[ 1330.147383]  txg_wait_open+0xa4/0xf8 [zfs]
[ 1330.147465]  dmu_free_long_range_impl+0x2c8/0x380 [zfs]
[ 1330.147582]  dmu_free_long_range+0xa0/0xd0 [zfs]
[ 1330.147664]  zfs_rmnode+0x2bc/0x3a0 [zfs]
[ 1330.147746]  zfs_zinactive+0xf4/0xf8 [zfs]
[ 1330.147828]  zfs_inactive+0x128/0x1f8 [zfs]
[ 1330.147924]  zpl_evict_inode+0x48/0x68 [zfs]
[ 1330.148006]  evict+0x124/0x378
[ 1330.148008]  iput+0x144/0x270
[ 1330.148010]  dentry_unlink_inode+0xd0/0x160
[ 1330.148012]  __dentry_kill+0xd0/0x208
[ 1330.148015]  dput+0x25c/0x480
[ 1330.148017]  __fput+0xd4/0x288
[ 1330.148018]  ____fput+0x18/0x28
[ 1330.148020]  task_work_run+0xc8/0x168
[ 1330.148021]  do_notify_resume+0x298/0x7e8
[ 1330.148023]  el0_svc+0xd8/0x138
[ 1330.148026]  el0t_64_sync_handler+0xb0/0xb8
[ 1330.148027]  el0t_64_sync+0x1a4/0x1a8
[ 1330.148031] INFO: task stress-ng:62173 blocked for more than 120 seconds.
[ 1330.148628]       Tainted: P           O      5.15.0-139-generic-64k 
#149~20.04.1-Ubuntu
[ 1330.149345] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this 
message.
[ 1330.149968] task:stress-ng       state:D stack:    0 pid:62173 ppid: 62101 
flags:0x00000001
[ 1330.149972] Call trace:
[ 1330.149972]  __switch_to+0x100/0x1a0
[ 1330.149975]  __schedule+0x2fc/0x8f0
[ 1330.149977]  schedule+0x64/0x138
[ 1330.149978]  io_schedule+0x24/0x58
[ 1330.149980]  cv_wait_common+0xd8/0x1c8 [spl]
[ 1330.149990]  __cv_wait_io+0x20/0x30 [spl]
[ 1330.150000]  txg_wait_open+0xa4/0xf8 [zfs]
[ 1330.150082]  dmu_free_long_range_impl+0x2c8/0x380 [zfs]
[ 1330.150164]  dmu_free_long_range+0xa0/0xd0 [zfs]
[ 1330.150245]  zfs_rmnode+0x2bc/0x3a0 [zfs]
[ 1330.150327]  zfs_zinactive+0xf4/0xf8 [zfs]
[ 1330.150409]  zfs_inactive+0x128/0x1f8 [zfs]
[ 1330.150491]  zpl_evict_inode+0x48/0x68 [zfs]
[ 1330.150573]  evict+0x124/0x378
[ 1330.150575]  iput+0x144/0x270
[ 1330.150576]  do_unlinkat+0x1d0/0x288
[ 1330.150579]  __arm64_sys_unlinkat+0x48/0x90
[ 1330.150580]  invoke_syscall+0x74/0xf0
[ 1330.150583]  el0_svc_common.constprop.0+0x58/0x1a8
[ 1330.150585]  do_el0_svc+0x2c/0xa0
[ 1330.150587]  el0_svc+0x40/0x138
[ 1330.150590]  el0t_64_sync_handler+0xb0/0xb8
[ 1330.150591]  el0t_64_sync+0x1a4/0x1a8
[ 1330.150593] INFO: task stress-ng:62174 blocked for more than 120 seconds.
[ 1330.151138]       Tainted: P           O      5.15.0-139-generic-64k 
#149~20.04.1-Ubuntu
[ 1330.151811] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this 
message.
[ 1330.152458] task:stress-ng       state:D stack:    0 pid:62174 ppid: 62101 
flags:0x00000001
[ 1330.152461] Call trace:
[ 1330.152462]  __switch_to+0x100/0x1a0
[ 1330.152464]  __schedule+0x2fc/0x8f0
[ 1330.152466]  schedule+0x64/0x138
[ 1330.152468]  io_schedule+0x24/0x58
[ 1330.152469]  cv_wait_common+0xd8/0x1c8 [spl]
[ 1330.152480]  __cv_wait_io+0x20/0x30 [spl]
[ 1330.152489]  txg_wait_open+0xa4/0xf8 [zfs]
[ 1330.152571]  dmu_free_long_range_impl+0x2c8/0x380 [zfs]
[ 1330.152653]  dmu_free_long_range+0xa0/0xd0 [zfs]
[ 1330.152734]  zfs_rmnode+0x2bc/0x3a0 [zfs]
[ 1330.152817]  zfs_zinactive+0xf4/0xf8 [zfs]
[ 1330.152912]  zfs_inactive+0x128/0x1f8 [zfs]
[ 1330.152994]  zpl_evict_inode+0x48/0x68 [zfs]
[ 1330.153076]  evict+0x124/0x378
[ 1330.153078]  iput+0x144/0x270
[ 1330.153079]  do_unlinkat+0x1d0/0x288
[ 1330.153081]  __arm64_sys_unlinkat+0x48/0x90
[ 1330.153083]  invoke_syscall+0x74/0xf0
[ 1330.153086]  el0_svc_common.constprop.0+0x58/0x1a8
[ 1330.153088]  do_el0_svc+0x2c/0xa0
[ 1330.153090]  el0_svc+0x40/0x138
[ 1330.153093]  el0t_64_sync_handler+0xb0/0xb8
[ 1330.153094]  el0t_64_sync+0x1a4/0x1a8
[ 1330.153095] INFO: task stress-ng:62175 blocked for more than 120 seconds.
[ 1330.153641]       Tainted: P           O      5.15.0-139-generic-64k 
#149~20.04.1-Ubuntu
[ 1330.154282] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this 
message.
[ 1330.154882] task:stress-ng       state:D stack:    0 pid:62175 ppid: 62101 
flags:0x00000001
[ 1330.154885] Call trace:
[ 1330.154885]  __switch_to+0x100/0x1a0
[ 1330.154888]  __schedule+0x2fc/0x8f0
[ 1330.154889]  schedule+0x64/0x138
[ 1330.154891]  io_schedule+0x24/0x58
[ 1330.154893]  cv_wait_common+0xd8/0x1c8 [spl]
[ 1330.154903]  __cv_wait_io+0x20/0x30 [spl]
[ 1330.154911]  txg_wait_open+0xa4/0xf8 [zfs]
[ 1330.154994]  dmu_free_long_range_impl+0x2c8/0x380 [zfs]
[ 1330.155075]  dmu_free_long_range+0xa0/0xd0 [zfs]
[ 1330.155155]  zfs_rmnode+0x2bc/0x3a0 [zfs]
[ 1330.155238]  zfs_zinactive+0xf4/0xf8 [zfs]
[ 1330.155320]  zfs_inactive+0x128/0x1f8 [zfs]
[ 1330.155402]  zpl_evict_inode+0x48/0x68 [zfs]
[ 1330.155484]  evict+0x124/0x378
[ 1330.155486]  iput+0x144/0x270
[ 1330.155487]  do_unlinkat+0x1d0/0x288
[ 1330.155489]  __arm64_sys_unlinkat+0x48/0x90
[ 1330.155522]  invoke_syscall+0x74/0xf0
[ 1330.155525]  el0_svc_common.constprop.0+0x58/0x1a8
[ 1330.155527]  do_el0_svc+0x2c/0xa0
[ 1330.155529]  el0_svc+0x40/0x138
[ 1330.155531]  el0t_64_sync_handler+0xb0/0xb8
[ 1330.155533]  el0t_64_sync+0x1a4/0x1a8
[ 1330.155534] INFO: task stress-ng:62176 blocked for more than 120 seconds.
[ 1330.156146]       Tainted: P           O      5.15.0-139-generic-64k 
#149~20.04.1-Ubuntu
[ 1330.156820] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this 
message.
[ 1330.157481] task:stress-ng       state:D stack:    0 pid:62176 ppid: 62101 
flags:0x00000001
[ 1330.157484] Call trace:
[ 1330.157485]  __switch_to+0x100/0x1a0
[ 1330.157487]  __schedule+0x2fc/0x8f0
[ 1330.157489]  schedule+0x64/0x138
[ 1330.157491]  io_schedule+0x24/0x58
[ 1330.157492]  cv_wait_common+0xd8/0x1c8 [spl]
[ 1330.157503]  __cv_wait_io+0x20/0x30 [spl]
[ 1330.157512]  txg_wait_open+0xa4/0xf8 [zfs]
[ 1330.157594]  dmu_free_long_range_impl+0x2c8/0x380 [zfs]
[ 1330.157675]  dmu_free_long_range+0xa0/0xd0 [zfs]
[ 1330.157756]  zfs_rmnode+0x2bc/0x3a0 [zfs]
[ 1330.157838]  zfs_zinactive+0xf4/0xf8 [zfs]
[ 1330.157934]  zfs_inactive+0x128/0x1f8 [zfs]
[ 1330.158016]  zpl_evict_inode+0x48/0x68 [zfs]
[ 1330.158098]  evict+0x124/0x378
[ 1330.158100]  iput+0x144/0x270
[ 1330.158101]  do_unlinkat+0x1d0/0x288
[ 1330.158103]  __arm64_sys_unlinkat+0x48/0x90
[ 1330.158105]  invoke_syscall+0x74/0xf0
[ 1330.158107]  el0_svc_common.constprop.0+0x58/0x1a8
[ 1330.158109]  do_el0_svc+0x2c/0xa0
[ 1330.158111]  el0_svc+0x40/0x138
[ 1330.158113]  el0t_64_sync_handler+0xb0/0xb8
[ 1330.158115]  el0t_64_sync+0x1a4/0x1a8
[ 1330.158117] INFO: task stress-ng:62223 blocked for more than 120 seconds.
[ 1330.158702]       Tainted: P           O      5.15.0-139-generic-64k 
#149~20.04.1-Ubuntu
[ 1330.159357] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this 
message.
[ 1330.160032] task:stress-ng       state:D stack:    0 pid:62223 ppid:     1 
flags:0x00000009
[ 1330.160035] Call trace:
[ 1330.160035]  __switch_to+0x100/0x1a0
[ 1330.160038]  __schedule+0x2fc/0x8f0
[ 1330.160040]  schedule+0x64/0x138
[ 1330.160041]  cv_wait_common+0x1c0/0x1c8 [spl]
[ 1330.160051]  __cv_wait+0x20/0x30 [spl]
[ 1330.160060]  dmu_buf_hold_array_by_dnode+0x354/0x540 [zfs]
[ 1330.160142]  dmu_read_impl+0xc0/0x1a8 [zfs]
[ 1330.160224]  dmu_read+0x7c/0xc8 [zfs]
[ 1330.160304]  zfs_fillpage+0xac/0x100 [zfs]
[ 1330.160387]  zfs_getpage+0x80/0x118 [zfs]
[ 1330.160469]  zpl_readpage_common+0x54/0x100 [zfs]
[ 1330.160551]  zpl_readpage+0x1c/0x28 [zfs]
[ 1330.160634]  filemap_read_page.isra.0+0x58/0x188
[ 1330.160637]  filemap_fault+0x7d8/0xad0
[ 1330.160639]  __do_fault+0x44/0x1e8
[ 1330.160641]  do_fault+0x1dc/0x438
[ 1330.160643]  __handle_mm_fault+0x34c/0x4c8
[ 1330.160645]  handle_mm_fault+0xcc/0x258
[ 1330.160647]  do_page_fault+0x180/0x528
[ 1330.160649]  do_translation_fault+0x98/0xc8
[ 1330.160650]  do_mem_abort+0x4c/0xc0
[ 1330.160652]  el1_abort+0x5c/0xe0
[ 1330.160655]  el1h_64_sync_handler+0xd8/0xe8
[ 1330.160657]  el1h_64_sync+0x7c/0x80
[ 1330.160658]  __arch_copy_from_user+0x180/0x218
[ 1330.160661]  _copy_from_iter+0x90/0x4a8
[ 1330.160663]  zfs_uiomove_iter+0xa4/0x118 [zfs]
[ 1330.160745]  zfs_uiomove+0x40/0x60 [zfs]
[ 1330.160827]  dmu_write_uio_dnode+0x98/0x170 [zfs]
[ 1330.160921]  dmu_write_uio_dbuf+0x60/0x88 [zfs]
[ 1330.161002]  zfs_write+0x384/0xb10 [zfs]
[ 1330.161085]  zpl_iter_write+0xe0/0x128 [zfs]
[ 1330.161167]  new_sync_write+0xf0/0x198
[ 1330.161171]  vfs_write+0x1f4/0x2d0
[ 1330.161173]  ksys_write+0x74/0x108
[ 1330.161175]  __arm64_sys_write+0x24/0x30
[ 1330.161176]  invoke_syscall+0x74/0xf0
[ 1330.161178]  el0_svc_common.constprop.0+0x58/0x1a8
[ 1330.161180]  do_el0_svc+0x2c/0xa0
[ 1330.161183]  el0_svc+0x40/0x138
[ 1330.161185]  el0t_64_sync_handler+0xb0/0xb8
[ 1330.161186]  el0t_64_sync+0x1a4/0x1a8
==========================================================================================

=========================== Test suite command 
===========================================
                                                                                
                 
09:36:57 DEBUG| [stdout] 
--------------------------------------------------------------------------------
                
09:36:57 DEBUG| [stdout] ZFS options:   recordsize=4096                         
                                         
09:36:57 DEBUG| [stdout] Stress test:   
/home/ubuntu/autotest/client/tmp/ubuntu_zfs_stress/src/stress-ng/stress-ng 
--veri
fy --times --metrics-brief --syslog --keep-name -t 5s --hdd 4 --hdd-opts 
sync,wr-rnd,rd-rnd,fadv-willneed,fadv-rnd --link
 4 --symlink 4 --lockf 4 --seek 4 --aio 4 --aio-requests 32 --dentry 4 --dir 4 
--dentry-order stride --fallocate 4 --fsta
t 4 --dentries 65536 --io 1 --lease 4 --mmap 0 --mmap-file --mmap-async --open 
4 --rename 4 --hdd-bytes 128M --fallocate-
bytes 128M --chdir 4 --chmod 4 --filename 4 --rename 4 --mmap-bytes 128M 
--hdd-write-size 512 --ionice-class besteffort -
-ionice-level 0                                                                 
                                         
09:36:57 DEBUG| [stdout] VDEV path:     
09:36:57 DEBUG| [stdout] Mount point:   /testpool/test
09:36:57 DEBUG| [stdout] Date:          Fri Oct 9 09:36:57 UTC 2026
09:36:57 DEBUG| [stdout] Host:          afaina-focal-test-kcp
09:36:57 DEBUG| [stdout] Kernel:        5.15.0-139-generic-64k 
#149~20.04.1-Ubuntu SMP Wed Apr 16 10:02:55 UTC 2025
09:36:57 DEBUG| [stdout] Machine:       afaina-focal-test-kcp aarch64
09:36:57 DEBUG| [stdout] CPUs online:   2
09:36:57 DEBUG| [stdout] CPUs total:    2
09:36:57 DEBUG| [stdout] Page size:     65536
09:36:57 DEBUG| [stdout] Pages avail:   47679
09:36:57 DEBUG| [stdout] Pages total:   63602
09:36:57 DEBUG| [stdout] 
--------------------------------------------------------------------------------
09:36:57 DEBUG| [stdout]  
09:36:57 DEBUG| [stdout] zfs set recordsize=4096 testpool/test
09:36:57 DEBUG| [stdout]  
09:36:57 DEBUG| [stdout] stress-ng: info:  [62101] aio stressor will be 
skipped, it is not implemented on this system: aa
rch64 Linux 5.15.0-139-generic-64k gcc 9.4.0 (built without aio.h)
09:36:57 DEBUG| [stdout] stress-ng: info:  [62101] setting to a 5 secs run per 
stressor
                          [0/2000]
09:36:57 DEBUG| [stdout] stress-ng: info:  [62101] dispatching hogs: 4 hdd, 4 
link, 4 symlink, 4 lockf, 4 seek, 4 dentry,
 4 dir, 4 fallocate, 4 fstat, 1 io, 4 lease, 2 mmap, 4 open, 4 rename, 4 chdir, 
4 chmod, 4 filename, 4 rename
09:36:57 DEBUG| [stdout] stress-ng: info:  [62101] note: 
/proc/sys/kernel/sched_autogroup_enabled is 1 and this can impac
t scheduling throughput for processes not attached to a tty. Setting this to 0 
may improve performance metrics
09:36:57 DEBUG| [stdout] stress-ng: info:  [62113] hdd: using 256M file system 
space per stressor instance (total 1G of 1
.75G available file system space)
09:36:57 DEBUG| [stdout] stress-ng: info:  [62141] fallocate: using 32M file 
system space per stressor instance (total 12
8M of 1.75G available file system space)
09:36:57 DEBUG| [stdout] stress-ng: info:  [62150] io: this is a legacy I/O 
sync stressor, consider using iomix instead
09:36:57 DEBUG| [stdout] stress-ng: info:  [62155] mmap: using 128M per 
stressor instance (total 256M of 2.87G available 
memory)
09:36:57 DEBUG| [stdout] stress-ng: info:  [62157] open: using a maximum of 
1048576 file descriptors
09:37:02 DEBUG| [stdout] stress-ng: info:  [62133] dentry: 19812 dentries 
allocated
09:39:02 DEBUG| [stdout] stress-ng: warn:  [62155] cannot terminate process 
62223, gave up after 120 seconds
09:39:02 DEBUG| [stdout] stress-ng: warn:  [62156] cannot terminate process 
62242, gave up after 120 seconds
==========================================================================================

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https://bugs.launchpad.net/bugs/2158722

Title:
  ubuntu_zfs_stress failure for jammy on openstack:ppc64el

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