Re: [Xenomai] About SMAP (was Re: Xenomai 3.0.3 is broken in my system)

[Leopold Palomo-Avellaneda <leo@alaxarxa.net>]

El Dijous, 6 d'octubre de 2016, a les 13:50:00, Jan Kiszka va escriure:
> On 2016-10-06 11:51, Leopold Palomo-Avellaneda wrote:
> > Hi,
> > 
> > lasts weeks I have been in a trouble with Xenomai and RTnet. Finally it
> > was
> > solved disabling some parameters in kernel (nosmap) Thanks again Jan.
> > 
> > That parameter is an interesting feature of the Intel processors [1,2],
> > that IMHO affects all the RTnet code and I hope that nothing more of
> > Xenomai.
> > 
> > It seems that fix it is could be easy, but it must be done (a boring task
> > ;-) In the middle, I would propose that some note could be added to the
> > FAQ, or "Troubleshooting a dual kernel configuration" page. Something
> > like this in the "Common kernel configuration issues":
> > 
> > CONFIG_X86_SMAP
> > 
> > On modern Intel processors with SMAP-enabled systems, kernel is not
> > allowed to access to userspace memory, it must be done in a special way.
> > So, until all Xenomai code was updated, specially RTnet, if you find
> > crashes with " unable to handle kernel paging request at " disable this
> > feature neither in kernel configuration or in boot with nosmap.
> 
> Send your proposal as patch for the included documentation or even the
> kernel Kconfig tests.

I think that I don't understand you. AFAIK xenomai documentation is in a 
Wordpress that Gilles installed and configured. I really don't know how to send 
a patch to that.

I'm just proposing that someone of the core team with write permissions to the 
wordpress make a cut and paste (if you think appropriate) of  that paragraph 
and add it to that part. That's all

Leopold
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