Public bug reported:
We have this issue on openstack:ppc64el where zfs transactions block
workqueues:
[ 967.637238] INFO: task kworker/u4:4:574 blocked for more than 241 seconds.
[ 967.637331] Tainted: P O 5.15.0-186-generic #196-Ubuntu
[ 967.637368] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this
message.
[ 967.637402] task:kworker/u4:4 state:D stack: 0 pid: 574 ppid: 2
flags:0x00000800
[ 967.637409] Workqueue: writeback wb_workfn (flush-zfs-62)
[ 967.637417] Call Trace:
[ 967.637418] [c0000000103c6f70] [c000000003f3e600] 0xc000000003f3e600
(unreliable)
[ 967.637424] [c0000000103c7160] [c00000000001dca4] __switch_to+0x134/0x230
[ 967.637429] [c0000000103c71c0] [c0000000012e7338] __schedule+0x228/0x700
[ 967.637434] [c0000000103c7280] [c0000000012e789c] schedule+0x8c/0x1a0
[ 967.637439] [c0000000103c72f0] [c0000000012e7a34] io_schedule+0x54/0x80
[ 967.637443] [c0000000103c7320] [c00800000372069c] cv_wait_common+0xf4/0x200
[spl]
[ 967.637456] [c0000000103c73c0] [c008000004b0caf8]
txg_wait_synced_impl+0xd0/0x1b0 [zfs]
[ 967.637562] [c0000000103c7410] [c008000004b0cbfc] txg_wait_synced+0x24/0x90
[zfs]
[ 967.637661] [c0000000103c7470] [c008000004a6bcfc] dmu_tx_wait+0x234/0x2d0
[zfs]
[ 967.637741] [c0000000103c74d0] [c008000004bd30f8] zfs_putpage+0x5c0/0x5f0
[zfs]
[ 967.637844] [c0000000103c7650] [c008000004be2a8c] zpl_putpage+0x54/0x90 [zfs]
[ 967.637949] [c0000000103c7690] [c000000000473ca0]
write_cache_pages+0x220/0x530
[ 967.637954] [c0000000103c77c0] [c008000004be28ac] zpl_writepages+0xc4/0x250
[zfs]
[ 967.638056] [c0000000103c7820] [c000000000476af0] do_writepages+0xc0/0x2e0
[ 967.638061] [c0000000103c78e0] [c00000000061c428]
__writeback_single_inode+0x68/0x4c0
[ 967.638066] [c0000000103c7930] [c00000000061cf84]
writeback_sb_inodes+0x2f4/0x730
[ 967.638070] [c0000000103c7a60] [c00000000061d698] wb_writeback+0x138/0x490
[ 967.638074] [c0000000103c7b20] [c00000000061ef28] wb_workfn+0x178/0x700
[ 967.638078] [c0000000103c7c70] [c0000000001aa7b4]
process_one_work+0x2f4/0x5e0
[ 967.638082] [c0000000103c7d10] [c0000000001ab088] worker_thread+0xa8/0x610
[ 967.638086] [c0000000103c7da0] [c0000000001b7d54] kthread+0x184/0x190
[ 967.638090] [c0000000103c7e10] [c00000000000cf64]
ret_from_kernel_thread+0x5c/0x64
[ 967.638108] INFO: task txg_quiesce:60772 blocked for more than 241 seconds.
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Affects: linux (Ubuntu Jammy)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Jammy)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/2158722
Title:
ubuntu_zfs_stress failure for jammy on openstack:ppc64el
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