System panic due to hung task and slow getdents system call

Issue

• server rebooted while running find cmd
• System panicked with the following stack trace:

INFO: task find:6717 blocked for more than 120 seconds.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
find          D ffff81184c122420     0  6717   6716          6718       (NOTLB)
 ffff8116f68e5e88 0000000000000082 ffffffff885a5c7b ffff8116f68e5e78
 0000000040000020 0000000000000007 ffff8116fce19040 ffff8108300947f0
 00000c6dcba35966 00000000000f5427 ffff8116fce19228 00000003885a0b02
Call Trace:
 [<ffffffff80025eae>] filldir+0x0/0xb7
 [<ffffffff80063c63>] __mutex_lock_slowpath+0x60/0x9b
 [<ffffffff80063cad>] .text.lock.mutex+0xf/0x14
 [<ffffffff80035696>] vfs_readdir+0x5c/0xa9
 [<ffffffff80038f77>] sys_getdents+0x75/0xbd
 [<ffffffff8005d23a>] tracesys+0x71/0xdf
 [<ffffffff8005d29e>] tracesys+0xd5/0xdf

Kernel panic - not syncing: hung_task: blocked tasks