El Dijous, 6 d'octubre de 2016, a les 19:30:54, Philippe Gerum va escriure: > On 10/06/2016 07:24 PM, Leopold Palomo-Avellaneda wrote: > > 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. > > No, I did it,
Sorry, I thought that was him. > and wordpress is fed by asciidoc input. Generated from where? make doc? > But instead of > documenting a shortcoming, I would rather fix it in the code. Sentences > like "until some code is updated" in a documentation reads as "when hell > freezes", simply because the effort was not put at the right place. You are right, but I didn't know how to express it in a polite and appropriate way. I just try to put a simply note in some place to try that other people (as today) didn't got crazy as me trying to find what the hell was happen. > So, since you seem to be requiring RTnet to work, why not writing a > patch fixing the places where that code hurts with respect to smap? Yes, it¡s in my TODO list. But it, at least to me, need some days, and add a simple note is simple and probably help other users. Also, I would note that "maybe" there are more hidden places where this BUG could appears and not just only RTnet. Best regards, Leopold -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 819 bytes Desc: This is a digitally signed message part. URL: <http://xenomai.org/pipermail/xenomai/attachments/20161006/b251a356/attachment.sig> _______________________________________________ Xenomai mailing list Xenomai@xenomai.org https://xenomai.org/mailman/listinfo/xenomai
