kernel.trace

task:xfs_io          state:S stack:    0 pid:841684 ppid:841677 flags:0x00004001
Call Trace:
 __schedule+0x3e9/0x660
 ? rpc_task_release_transport+0x42/0x60
 schedule+0x46/0xb0
 schedule_timeout+0x20e/0x2a0
 ? nfs4_call_sync_custom+0x23/0x30
 wait_for_completion_interruptible+0x80/0x120
 nfs42_proc_copy+0x505/0xb00
 ? find_get_pages_range_tag+0x211/0x270
 ? enqueue_task_fair+0xb5/0x500
 ? __filemap_fdatawait_range+0x66/0xf0
 nfs4_copy_file_range+0x198/0x240
 vfs_copy_file_range+0x39a/0x470
 ? ptrace_do_notify+0x82/0xb0
 __x64_sys_copy_file_range+0xd6/0x210
 do_syscall_64+0x33/0x40
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x7f8eead1e259
RSP: 002b:00007ffcb1bb5778 EFLAGS: 00000206 ORIG_RAX: 0000000000000146
RAX: ffffffffffffffda RBX: 00007ffcb1bb5790 RCX: 00007f8eead1e259
RDX: 0000000000000003 RSI: 00007ffcb1bb5790 RDI: 0000000000000004
RBP: 0000000020000000 R08: 0000000020000000 R09: 0000000000000000
R10: 00007ffcb1bb5798 R11: 0000000000000206 R12: 00007ffcb1bb5798
R13: 0000000000000004 R14: 0000000000000001 R15: 0000000000000000