From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <45DEA6D9.6010306@domain.hid> Date: Fri, 23 Feb 2007 09:33:29 +0100 From: Jan Kiszka MIME-Version: 1.0 References: <451C586A.7020309@domain.hid> <1159628606.5014.33.camel@domain.hid> <4522A377.5030503@domain.hid> <45DDCC6D.6020908@domain.hid> <45DDCEE0.7070901@domain.hid> <45DDD478.7070403@domain.hid> In-Reply-To: <45DDD478.7070403@domain.hid> Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="------------enigF1913B8AE764E46FD8F064C1" Sender: jan.kiszka@domain.hid Subject: [Xenomai-help] Re: [Xenomai-core] possible future conflict w LOCAL_APIC List-Id: Help regarding installation and common use of Xenomai List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: =?ISO-8859-15?Q?Jan_R=FCdiger?= Cc: xenomai@xenomai.org This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enigF1913B8AE764E46FD8F064C1 Content-Type: text/plain; charset=ISO-8859-15 Content-Transfer-Encoding: quoted-printable Jan R=FCdiger wrote: > Jan Kiszka wrote: >> Jan R=FCdiger wrote: >>> Hello >>> >>> Few months ago there was a discussion about disabling local apic in t= he >>> kernel. The last point in this discussion was: >>> >>>> update: >>>> >>>> Ingo Molnar has voiced strong preference that the config option rema= in, >>>> citing 60kb growth in its removal. So its probably safe for now ;-)= >>> Now i have the problem that i cant disable the X86_UP_APIC anymore wh= en >>> building the kernel 2.6.19. Normally this isn't a problem since it is= >> ??? >> >> There is no "select X86_UP_APIC" in kbuild that would make this mandat= ory. >=20 > Thanks for your fast reply. Actually the option X86_UP_APIC is missing > when doing "make menuconfig" under "Processor type and Feature" and als= o > in the .config file. Thats why i can't disable it. > As far as i understood it, this option was taken away an replaced with > the possibility to have noapic flag at boot time. > With this, however, xenomai ist still build with APIC enabled and > refuses to run. Do you happen to have SMP on? It takes away the choice of UP_APIC, because it assumes to find an APIC in any case. >=20 > My 2.6.19.2 kernel was downloaded from kernel.org. All i did was "make > cloneconfig" and then enabling xenomai and a few other things > (preemption etc.) Unless you need it otherwise, CONFIG_PREEMPT is not required for good Xenomai latencies. Jan PS: Please take care of CC, I re-added xenomai-help. --------------enigF1913B8AE764E46FD8F064C1 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFF3qbaniDOoMHTA+kRApTPAJ0TEw6+dwpRXbwT94zUksFPMMzTKQCfcZuW oxZ0lag0UrLksXZK+3efo/M= =WegJ -----END PGP SIGNATURE----- --------------enigF1913B8AE764E46FD8F064C1--