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

Solution Unverified - Updated -


  • 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

Subscriber exclusive content

A Red Hat subscription provides unlimited access to our knowledgebase, tools, and much more.

Current Customers and Partners

Log in for full access

Log In

New to Red Hat?

Learn more about Red Hat subscriptions

Using a Red Hat product through a public cloud?

How to access this content