Re: [gentoo-amd64] multicore strange issue

[Beso]

2008/6/3 Drake Donahue <donahue95@×××××××.net>:

>
> On Tue, 2008-06-03 at 09:01 +0000, Beso wrote:
> > hi,
> >
> > i've got a strange problem with my new notebook pc. i've bought a pc
> > with an amd athlon 64 x2 processor with 2 cores, an atheros board and
> > an rs690 ati.
> > my old pc was a turion 64 with an atheros board and an rs480. now the
> > components inside are all about the same so i've just copied the old
> > gentoo system into the new pc and tried to recompile the kernel to
> > have it tuned for the new processor. so the thing i've done was to
> > activate the symetric multiprocessing and set to compiled into the
> > kernel of md4, md5, md6 and aes x86_64 chipers for a luks /home
> > chipering.
> > the problem is that with the old normal config the kernel detects one
> > processor and one core and it works, loading the modules, but when
> > enabling simetric multiprocessing the kernel detects just one
> > processor and one core and then it fails to load modules because of a
> > different executable format in the modules.
> >
> > the strange thing is that opensuse livecd and mandriva live cd
> > recognize the double processor (/proc/cpuinfo has 2 lines) and is able
> > to step it in the right way. does anyone has a hint on what to control
> > in the kernel config to see what's wrong?!
> >
> > thanks.
> >
> > --
> > dott. ing. beso
> If the attempt to boot does not end in a kernel panic;
> use <shift-page up> to get to the top of the console output produced
> during boot. If the boot loader has started an SMP kernel, a line
> similar to this: "Linux Version 2.6.24-gentoo-r8 (root@livecd) (gcc
> version 4.1.1 (gentoo 4.1.1-r3)) #1 SMP Sat May 24 14:06:10 EDT 2008"
> should appear.  The key word being SMP. No key word, "SMP", means that
> "make menuconfig" (or whatever kernel configuration tool you use needs
> to be redone.
> As far as I know under, Processor type and features,:
>    [*] Symmetric multi-processing support
>    Subarchitecture Type (PC-compatible)  --->
>    Processor family (Opteron/Athlon64/Hammer/K8)  --->
> produces an appropriate SMP kernel.
> A <shift-page down> should reveal a line like:
> CPU has two num_cores
> A couple more <shift-page down>:
> Initializing CPU#0
> About 3 more <shift-page down>:
> Brought up 2 CPU's.
> About modules, I'm guessing modules compiled for single cpu have
> differences from those compiled for multiple cpu. Also guessing
> that /etc/modules/autoload.d and/or udev is trying to load single cpu
> module(s) that were not written to adjust to a single cpu kernel.
>

so grub needs a different line at startup when using multicore?!



-- 
dott. ing. beso