From: "M. Koehrer" <mathias_koehrer@domain.hid>
To: jan.kiszka@domain.hid, mathias_koehrer@domain.hid
Cc: xenomai@xenomai.org
Subject: Re: Re: [Xenomai-help] Xenomai patched SMP kernel and "nosmp" kernel
Date: Fri, 15 Dec 2006 08:55:32 +0100 (CET) [thread overview]
Message-ID: <10171906.1166169332781.JavaMail.ngmail@domain.hid> (raw)
In-Reply-To: <45800AA5.9000603@domain.hid>
Hi Jan,
I tried the kernel parameter maxcpus=0 on my SMP enabled, Xenomai-patched kernel (same as in mails below).
The kernel does not boot.
It stops after a couple of messages:
IOAPIC[0]: Invalid reference to IRQ 0
Regards
Mathias
> M. Koehrer wrote:
> > Hi everybody,
> >
> > I have a SMP kernel 2.6.17.7 on a Dual Core Pentium 4 running.
> > SMP is enabled at the kernel configuration.
> > This works fine.
> > However, I want to compare UP with SMP operation, that's why
> > I want to boot the system with the "nosmp" kernel parameter.
> > However, booting of the PC with nosmp does not work.
> > First it starts fine, however when trying to access hdb (which is the CD
> ROM
> > drive in my system) to get info about it, the message
> > "hdb: lost interrupt"
> > appears, and booting is stopped.
> >
> > Does the nosmp parameter work with a Xenomai patched kernel?
> > Or what could be wrong with it....
> >
> > I am using the latest Xenomai SVN #1948.
> > The kernel patch is adeos-ipipe-2.6.17-i386-1.5-02.patch
> >
> > Any ideas on this?
>
> Same for maxcpus=0? I'm asking as this configures the system more
> aggressively smp-less on x86 (patching spinlock alternatives for UP,
> configuring LAPIC mode etc.).
--
Mathias Koehrer
mathias_koehrer@domain.hid
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next prev parent reply other threads:[~2006-12-15 7:55 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-12-12 12:59 [Xenomai-help] Xenomai patched SMP kernel and "nosmp" kernel parameter M. Koehrer
2006-12-13 14:13 ` Jan Kiszka
2006-12-15 7:55 ` M. Koehrer [this message]
2006-12-15 8:47 ` [Xenomai-help] Xenomai patched SMP kernel and "nosmp" kernel Jan Kiszka
2006-12-15 10:46 ` M. Koehrer
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