Re: apic doesn't work with 32bit kernel (fine with 64bit) [asus m2n-mx se+]

[Yinghai Lu]

On Sun, Apr 13, 2008 at 5:59 AM, Christoph Pfister
<christophpfister@xxxxxxxxx> wrote:
> Am Sonntag 13 April 2008 01:15:51 schrieb Yinghai Lu:
>
> > On Sat, Apr 12, 2008 at 12:20 PM, Christoph Pfister
>  >
>  > <christophpfister@xxxxxxxxx> wrote:
>  > > Hi,
>  > >
>  > >  Using a new motherboard, I came across a kernel panic (dmesg using
>  > > 2.6.25-rc9 [x86_32] transcribed from screenshot attached; also dmesg when
>  > >  using "apic=debug").
>  > >  The system works nearly fine when using "noapic" (setting rtc doesn't
>  > > work).
>  > >
>  > >  Everything (including apic and rtc) works like a charm when I use the
>  > > x86_64 version with (nearly) the same kernel config (dmesg attached as
>  > > well).
>  >
>  > how about booting 64 bit apic=debug?
>
>  Attached.
>
>
>  > wonder if using kexec to load 32bit kernel from 64 bit kernel help.
>
>  What should it help? Btw, grabbed a good old RS232 cable to get more than 25
>  lines of dmesg :) - attached as well.

only difference, it seems 32bit enable io_apic after all cpus up.  and
64 bit will enable that just after first cpu.

YH
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