Issue

System logs captured the below call traces:

kernel: INFO: task statvfs:9055 blocked for more than 120 seconds.
kernel: "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
kernel: statvfs       D ffff8802e6952040     0  9055   2216          9060  9051 (NOTLB)
kernel:  ffff8802c4029a28  0000000000000286  ffff8802ef188628  ffffffff802649e8
kernel:  0000000000000009  ffff8802e6952040  ffff8802ffc79040  0000000000000b49
kernel:  ffff8802e6952228  ffffffff80289433
kernel: Call Trace:
kernel:  [<ffffffff802649e8>] _write_lock_irqsave+0x9/0x1c
kernel:  [<ffffffff80289433>] __wake_up_common+0x3e/0x68
kernel:  [<ffffffff8022f2bd>] __wake_up+0x38/0x4f
kernel:  [<ffffffff8844b842>] :nfs:nfs_idmap_id+0x189/0x209
 kernel:  [<ffffffff8028ac29>] default_wake_function+0x0/0xe
kernel:  [<ffffffff8844663e>] :nfs:decode_getfattr+0x73c/0xc5e
kernel:  [<ffffffff883d7771>] :sunrpc:rpc_wait_bit_interruptible+0x0/0x28
kernel:  [<ffffffff88446ca9>] :nfs:nfs4_xdr_dec_getattr+0x0/0x4f
kernel:  [<ffffffff88446cf1>] :nfs:nfs4_xdr_dec_getattr+0x48/0x4f
kernel:  [<ffffffff883d2913>] :sunrpc:call_decode+0x4b7/0x509
kernel:  [<ffffffff883d7be7>] :sunrpc:__rpc_execute+0x9c/0x2df
kernel:  [<ffffffff883d2aad>] :sunrpc:rpc_call_sync+0x80/0xaa
kernel:  [<ffffffff883d2acd>] :sunrpc:rpc_call_sync+0xa0/0xaa
kernel:  [<ffffffff8843fbea>] :nfs:nfs4_proc_getattr+0x77/0x96
kernel:  [<ffffffff8842fc9c>] :nfs:__nfs_revalidate_inode+0x13e/0x263
kernel:  [<ffffffff8022d6dc>] mntput_no_expire+0x19/0x89
kernel:  [<ffffffff8022d6dc>] mntput_no_expire+0x19/0x89
kernel:  [<ffffffff8020f028>] link_path_walk+0xac/0xb8
kernel:  [<ffffffff88430971>] :nfs:nfs_getattr+0xaf/0xd9
kernel:  [<ffffffff802296ef>] vfs_stat_fd+0x32/0x4a
kernel:  [<ffffffff80267d61>] do_page_fault+0xfa5/0x131b
kernel:  [<ffffffff8020e74e>] do_mmap_pgoff+0x618/0x783
kernel:  [<ffffffff80281c1f>] sys32_stat64+0x11/0x29
kernel:  [<ffffffff802616f6>] ia32_tracesys+0x32/0x6c
kernel:  [<ffffffff802616a5>] ia32_sysret+0x0/0x5