From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <5283967C.70403@xenomai.org> Date: Wed, 13 Nov 2013 16:10:52 +0100 From: Philippe Gerum MIME-Version: 1.0 References: <52839493.4040300@xenomai.org> In-Reply-To: <52839493.4040300@xenomai.org> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Subject: Re: [Xenomai] patch the kernel? List-Id: Discussions about the Xenomai project List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Gilles Chanteperdrix , Grant Cc: xenomai@xenomai.org On 11/13/2013 04:02 PM, Gilles Chanteperdrix wrote: > On 11/13/2013 02:36 PM, Grant wrote: >> Is patching the kernel necessary in order to use xenomai? > > It depends on which version of Xenomai you are talking about. If you are > talking about Xenomai stable version, then yes, you have to follow the > installation instructions here: > http://www.xenomai.org/documentation/xenomai-2.6/html/README.INSTALL/ > > Which include running the "prepare-kernel.sh" patch, which modifies the > kernel. > > If you are talking about Xenomai current development version, a.k.a. > Xenomai forge, then it gives you the choice of running: > - on an unmodified kernel (but you will not have real-time guarantees); > - a kernel patched with the PREEMPT_RT patch; > - a kernel modified as with the stable version. > > The current state of Xenomai forge is that it is stable enough on the > x86 and ARM architectures to run a latency test under load. > blackfin and powerpc32 are ok too. powerpc64 untested yet. -- Philippe.