Re: [PowerPC] Kernel panic while running CPU toggle test on 4.8.0 kernel

From: Balbir Singh
Date: Fri Oct 14 2016 - 07:05:46 EST

On 14/10/16 17:24, Abdul Haleem wrote:
> Hi,
> Kernel Oops, followed by kernel panic seen while running rcutorture test on 4.8.0 kernel
> Machine Type : PowerPC Bare Metal
> RCU torture test steps:
> 1. modprobe rcutorture
> 2. start CPU offline and online while torture test is running
> dmesg start flooded with Oops messages following kernel panic resulted in machine reboot.

Good bug. The report looks good

Any chance you could add ftrace_dump_on_oops to command line and start this test
with tracing enabled? Otherwise, getting the line via addr2line of select_task_rq_fair+0xac8/0xca0
would be helpful.

It would also be nice to know the CFAR value (CFAR: c0000000000089e0) using

Balbir Singh.