On Mon, Jul 02, 2018 at 10:29:30AM +0200, Greg KH wrote: > On Mon, Jul 02, 2018 at 08:58:16AM +0100, Justin Skists wrote: > > > > > On 01 July 2018 at 13:44 bing zhu <zhubohong12@xxxxxxxxx> 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. > > You just have to use the apis we have for this already, it's been > possible to do this for many years now. > > As for why you would want to do this within the kernel itself, well, I > can understand that need for some situations, and it is possible to do > as well, just use the correct api and all is fine (no, I can't remember > what it is at the moment, sorry...) > > greg k-h > What are you saying? That is the filesystem bus sends a HW interupt on the bus that the scheuler will ignore it and refuse to swap the executable to handle the HW interupt? > _______________________________________________ > Kernelnewbies mailing list > Kernelnewbies@xxxxxxxxxxxxxxxxx > https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies -- So many immigrant groups have swept through our town that Brooklyn, like Atlantis, reaches mythological proportions in the mind of the world - RI Safir 1998 http://www.mrbrklyn.com DRM is THEFT - We are the STAKEHOLDERS - RI Safir 2002 http://www.nylxs.com - Leadership Development in Free Software http://www2.mrbrklyn.com/resources - Unpublished Archive http://www.coinhangout.com - coins! http://www.brooklyn-living.com Being so tracked is for FARM ANIMALS and and extermination camps, but incompatible with living as a free human being. -RI Safir 2013 _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx https://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
