On 02 July 2018 at 09:29 Greg KH <greg@kroah.com> wrote:
On Mon, Jul 02, 2018 at 08:58:16AM +0100, Justin Skists wrote:
On 01 July 2018 at 13:44 bing zhu <zhubohong12@gmail.com> wrote:
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 ?
Yowsers! Why would you want to do that? The whole idea of a watchdog is to prevent threads hogging the CPU for a long time. Linux is a multi-user, multi-process, pre-emptive operating system. It needs to share. :-)
Not true, Linux can take a cpu, remove itself from it, and run a single process if needed, just fine. It's a great operating system for such a thing.
Hmm. Interesting. Looks like I've got more reading to do. :-) Thanks, Justin.