From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <4C07BC21.1080907@domain.hid> Date: Thu, 03 Jun 2010 16:28:49 +0200 From: Jan Kiszka MIME-Version: 1.0 References: <4C04E8D8.8030101@domain.hid> <4C04EDAF.1080800@domain.hid> <4C051100.7000803@domain.hid> <4C051E26.8020102@domain.hid> <4C053217.5010809@domain.hid> <4C053608.3030604@domain.hid> <4C06011A.7020507@domain.hid> <4C07A9F4.7090709@domain.hid> <4C07AC61.4040705@domain.hid> <4C07B031.6090504@domain.hid> <4C07B530.3040200@domain.hid> <4C07B70E.6050303@domain.hid> In-Reply-To: <4C07B70E.6050303@domain.hid> Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="------------enigA4F8F05D1029F66D37771B45" Sender: jan.kiszka@domain.hid Subject: Re: [Xenomai-help] Linux kernel 2.6.32.14 and Xenomai 2.5.2 does not boot List-Id: Help regarding installation and common use of Xenomai List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Gilles Chanteperdrix , Daniele Nicolodi Cc: xenomai@xenomai.org This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enigA4F8F05D1029F66D37771B45 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Gilles Chanteperdrix wrote: > Jan Kiszka wrote: >> Gilles Chanteperdrix wrote: >>> Daniele Nicolodi wrote: >>>> Booting a working 2.6.30 kernel I noticed this error message as firs= t >>>> output on the console. Can it be related to my issue with more moder= n >>>> kernels and ipipe patches? >>>> >>>> ERROR: 8254 timer not connected to IO-APIC >>>> >>>> I have no idea of what it means. >>> Is APIC enabled in your kernel configuration? >> It likely is. >> >> I'm getting this error for many kernel releases now. It must be relate= d >> to I-pipe's patching of the APIC or IO-APIC code. Irritating but mostl= y >> harmless. >=20 > What I mean is that when Xenomai wants to use the 8254 (which is the > case if the APIC is disabled in linux kernel configuration) and the 825= 4 > has become unreachable by Linux by some change in recent versions, > Xenomai timing subystem becomes screwed up. >=20 > When, on the other hand, Xenomai wants to use the APIC, the fact that > the 8254 has become unreachable is harmless. =2E..but people continue to report this as bug. >=20 > And from the .config Daniele posted, it appears that he disabled APIC, > so that Xenomai is trying to use the 8254. Right. And the HPET is on, so this programmed to fail. Daniele, please enable CONFIG_X86_UP_APIC or disable CONFIG_HPET_TIMER - just as Kconfig warned you. Jan --------------enigA4F8F05D1029F66D37771B45 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.9 (GNU/Linux) Comment: Using GnuPG with SUSE - http://enigmail.mozdev.org iEYEARECAAYFAkwHvCcACgkQitSsb3rl5xSCIQCfSydoVlLqWHpyO41iLY+ojOV1 YkQAnjw3gEtyKAJvTAsOxurIg06FQwg0 =LOjS -----END PGP SIGNATURE----- --------------enigA4F8F05D1029F66D37771B45--