Memtest

modulename: memtest.ko

configname: CONFIG_MEMTEST

Linux Kernel Configuration
└─>Kernel hacking
└─>Kernel Testing and Coverage
└─>Memtest
In linux kernel since version 2.6.27 (release Date: 2008-10-09)  
This option adds a kernel parameter 'memtest', which allows memtest
to be set.
memtest=0, mean disabled; -- default
memtest=1, mean do 1 test pattern;
...
memtest=17, mean do 17 test patterns.
If you are unsure how to answer this question, answer N.

source code: