Tool to test soft and hardlockups.

Valdis.Kletnieks at Valdis.Kletnieks at
Fri Dec 13 09:30:48 EST 2013

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'.
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