Tool to test soft and hardlockups.

Vipul Jain vipulsj at
Fri Dec 13 15:32:24 EST 2013

On Fri, Dec 13, 2013 at 6:30 AM, <Valdis.Kletnieks at> wrote:

> On Thu, 12 Dec 2013 16:45:32 -0800, Vipul Jain said:
> > I would like  to enable softlockup and hardlockup option in Linux kernel
> > and would like to test it to make sure that when soft and hard lockup
> > condition arises we do see kernel taking configured action. Hence was
> > wondering if there is any tool to do the same (basically injecting the
> > errors).
> Build your kernel with CONFIG_BOOTPARAM_HARDLOCKUP_PANIC and/or
> CONFIG_BOOTPARAM_SOFTLOCKUP_PANIC and then stick an infinite loop
> somewhere in the kernel.  See lib/Kconfig.debug under 'Debug Lockups and
> Hangs'.

Hi Valids,

I am able to configure the kernel with soft and hard lockup flags but now I
would like to generate and hard and soft lockup event and verify it and was
wondering if we have any tool in place that I can use, if not, any guidance
of how to go about testing it will be great.

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