INFO: task kcompactd0:1624 blocked for more than 143 seconds.
      Not tainted 5.12.0-rc6-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kcompactd0      state:D stack:27928 pid: 1624 ppid:     2 flags:0x00004000
Call Trace:
 context_switch kernel/sched/core.c:4322 [inline]
 __schedule+0x911/0x21b0 kernel/sched/core.c:5073
 schedule+0xcf/0x270 kernel/sched/core.c:5152
 io_schedule+0xba/0x130 kernel/sched/core.c:7209
 wait_on_page_bit_common+0x571/0xe90 mm/filemap.c:1274
 lock_page include/linux/pagemap.h:610 [inline]
 __unmap_and_move mm/migrate.c:1050 [inline]
 unmap_and_move mm/migrate.c:1200 [inline]
 migrate_pages+0x98a/0x35d0 mm/migrate.c:1472
 compact_zone+0x1abd/0x3820 mm/compaction.c:2365
 kcompactd_do_work+0x2c9/0x730 mm/compaction.c:2775
 kcompactd+0x262/0xd10 mm/compaction.c:2870
 kthread+0x3b1/0x4a0 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294

Showing all locks held in the system:
1 lock held by systemd/1:
1 lock held by kthreadd/2:
4 locks held by kworker/0:0/5:
4 locks held by kworker/0:1/7: