1 <...>-3694 ( 3694) [006] d..3 20.258854: sched_blocked_reason: pid=269 iowait=0 caller=worker_thread+0x534/0x820 2 <idle>-0 (-----) [000] d.s4 21.123838: sched_blocked_reason: pid=2172 iowait=1 caller=__filemap_fdatawait_range+0x134/0x150 3