[LITMUS^RT] Creating a new plugin problem

Matteo Locatelli matteo.locatelli1993 at gmail.com
Fri Apr 7 17:23:12 CEST 2017


Can you tell me the procedure to reinstall the kernel? Because I think that
probably I'm doing something wrong in this step.

Regards
Matteo

Il 07 Apr 2017 13:28, "Björn Brandenburg" <bbb at mpi-sws.org> ha scritto:

>
> > On 2 Apr 2017, at 19:25, Matteo <matteo.locatelli1993 at gmail.com> wrote:
> >
> > The DEMO plugin isn't in the loaded file, but I can't understand why,
> it's the first time I'm trying to do something like that. Can you tell me a
> way to add the plugin? Thanks.
> >
> > Matteo
> >
> > On 02.04.2017 18:10, Namhoon Kim wrote:
> >> Hi Matteo,
> >>
> >> If you have successfully added DEMO plugin, you should see DEMO plugin
> in /proc/litmus/plugins/loaded. Can you check the loaded plugins?
> >>
> >> Namhoon
> >>
> >> On Sun, Apr 2, 2017 at 11:50 AM, Matteo <matteo.locatelli1993 at gmail.com>
> wrote:
> >> Hi everyone, I want to develop a new plugin for LITMUS^RT, so I
> downloaded the virtual image found on the website and I started to follow
> the tutorial that I found on the wiki. I'm currently stuck on step 2: I
> created the sched_demo.c file (copying the code from the tutorial), added
> sched_demo.o to the obj-y list in the Makefile located in the litmus folder
> and compiled the kernel using make in the litmus-rt folder. When I try to
> run the instruction setsched DEMO, it returns me this error:
> >>
> >> Error: Cannot write to /proc/litmus/active_plugin. Do you have root
> privileges?
> >> Error: Setting new plugin failed.
> >> Are there any active real-time tasks?
> >>
> >> Can you tell me what I am doing wrong? Thanks.
> >> Matteo Locatelli
>
>
> Did you install the new kernel and reboot?
> What does uname -a say?
> Does dmesg say anything about the demo plugin being loaded?
>
> - Björn
>
>
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