Softlockup and Hardlockup sample test module

[NiftyLinKern Mitchell]

On Sun, Apr 15, 2018 at 12:47 AM, Ivid Suvarna <ivid.suvarna at gmail.com>
wrote:
>
> Hi All,
>
> Could you please provide some sample test module for causing a
> Softlockup and Hardlockup in latest kernel for SMP for testing


Have you looked at this book?

Operating System Principles   by Per Brinch Hansen

It outlines some basic multi processing locking strategies and how things
might break.

These apply to multiple process user programs as well as kernel code.

Being inside a lock has impact only on that lock and the tree of locks ,
data and code that depend on it.

Locking of two types come to mind.  Locked data or a lock on a monitor
function that  manages a set of things
that depend on each other or just simply modifies data.

Interrupt and signal masks play an important part in all of this.
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