Question about watchdog

Dear Sir/Ma'am Thank you for your time ,i'm a student new to linux kernel.at present ,i'd like to create a kernel thread say use kthread_create func ,my question is :how can i make this thread to run on a cpu and never get switched or scheduled , there is a while(1).....structure in that thread i need it to do work . at present i comes with errors like "NMI watchdog: BUG: soft lockup - CPU#0 stuck for 23s! [test thread :1881]",i understand there is a watchdog but is there anyway i can feed the dog myself and let my thread have cpu as much as i want ? thanks again ,any information would be great ! best wishes!