Why synchronize_rcu() causing LOCKUP on CPU X ?
Issue
- System printed a series of hung_task_timeout_secs messages and finally crashed with following panic:
NMI Watchdog detected LOCKUP on CPU 2
CPU 2
Pid: 0, comm: swapper Tainted: PF ---- 2.6.18-308.4.1.el5 #1
RIP: 0010:[<ffffffff8006b9cf>] [<ffffffff8006b9cf>] mwait_idle_with_hints+0x66/0x67
..
Process swapper (pid: 0, threadinfo ffff81128004a000, task ffff810140d77860)
..
Call Trace:
[<ffffffff801a498a>] acpi_processor_idle_simple+0x172/0x341
[<ffffffff801a4818>] acpi_processor_idle_simple+0x0/0x341
[<ffffffff80048f67>] cpu_idle+0x95/0xb8
[<ffffffff80078ae2>] start_secondary+0x479/0x488
Environment
- Red Hat Enterprise Linux 5.8
- kernel-2.6.18-308.4.1.el5
Subscriber exclusive content
A Red Hat subscription provides unlimited access to our knowledgebase of over 48,000 articles and solutions.
Welcome! Check out the Getting Started with Red Hat page for quick tours and guides for common tasks.
