From mboxrd@z Thu Jan 1 00:00:00 1970 From: Leopold Palomo-Avellaneda Date: Thu, 06 Oct 2016 19:24:15 +0200 Message-ID: <7810159.2OkF4KFj7y@fura> In-Reply-To: <5ed168a2-fa54-0d21-a6ff-05abe1d95b11@siemens.com> References: <2990549.hKSmcVRoDB@indiana> <2013828.8eEOvBkU4r@soho> <5ed168a2-fa54-0d21-a6ff-05abe1d95b11@siemens.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Subject: Re: [Xenomai] About SMAP (was Re: Xenomai 3.0.3 is broken in my system) List-Id: Discussions about the Xenomai project List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Jan Kiszka Cc: xenomai@xenomai.org 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 -------------- 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: