Re: [Xenomai-help] Xenomai patched SMP kernel and "nosmp" kernel parameter

[Jan Kiszka <jan.kiszka@domain.hid>]

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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.).

Jan


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