The system got hung up and then crashed where one process was holding a mutex lock long time

Solution Unverified - Updated -

Issue

  • The system got hung up and then crashed.
       PANIC: "Kernel panic - not syncing: hung_task: blocked tasks"

[22530119.693445] Kernel panic - not syncing: hung_task: blocked tasks
[22530119.693468] CPU: 11 PID: 173 Comm: khungtaskd Kdump: loaded Tainted: P        W  OE  ------------   3.10.0-1160.el7.x86_64 #1
[22530119.693492] Hardware name: Dell Inc. PowerEdge R740/0DY2X0, BIOS 2.10.2 02/24/2021
[22530119.693508] Call Trace:
[22530119.693518]  [<ffffffff95981340>] dump_stack+0x19/0x1b
[22530119.693530]  [<ffffffff9597a898>] panic+0xe8/0x21f
[22530119.693543]  [<ffffffff9534e48e>] watchdog+0x26e/0x2c0
[22530119.693555]  [<ffffffff9534e220>] ? reset_hung_task_detector+0x20/0x20
[22530119.693570]  [<ffffffff952c5c21>] kthread+0xd1/0xe0
[22530119.693583]  [<ffffffff952c5b50>] ? insert_kthread_work+0x40/0x40
[22530119.693598]  [<ffffffff95993df7>] ret_from_fork_nospec_begin+0x21/0x21
[22530119.693614]  [<ffffffff952c5b50>] ? insert_kthread_work+0x40/0x40

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