linux-kernel - Re: 2.6.31: booting on a PIII Celeron?

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Date:	Mon, 28 Sep 2009 20:41:37 +0400
From:	Cyrill Gorcunov <gorcunov@...il.com>
To:	Pavel Machek <pavel@....cz>
Cc:	Michael Tokarev <mjt@....msk.ru>,
	Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: 2.6.31: booting on a PIII Celeron?

[Pavel Machek - Mon, Sep 28, 2009 at 06:36:17PM +0200]
| > Michael Tokarev wrote:
| > >Hello.
| > >I've a problem here with 2.6.31.  kernel is
| > >compiled for PIII:
| > >
| > > CONFIG_MPENTIUMIII=y
| > > CONFIG_X86_GENERIC=y
| > >
| > >This kernel works on real PIII machine - like this:
| > >
| > >vendor_id    : GenuineIntel
| > >cpu family    : 6
| > >model        : 8
| > >model name    : Pentium III (Coppermine)
| > >stepping    : 10
| > >cpu MHz        : 997.580
| > >
| > >But it fails on a Celeron:
| > >
| > >vendor_id    : GenuineIntel
| > >cpu family    : 6
| > >model        : 8
| > >model name    : Celeron (Coppermine)
| > >stepping    : 6
| > >cpu MHz        : 797.481
| > >
| > 
| > There's one more difference between the two:
| > 
| > PIII, working:
| > flags: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pse36 
| > mmx fxsr sse up
| > Celeron, !working:
| > flags: fpu vme de pse tsc msr pae mce cx8 sep mtrr pge mca cmov pse36 mmx 
| > fxsr sse up
| > 
| > So the celeron machine lacks "apic" flag.  And in my
| > kernel config, apic is enabled:
| >  CONFIG_X86_LOCAL_APIC=y
| >  CONFIG_X86_IO_APIC=y
| > (but not on the command line like apic=force)
| try 'noapic nolapic' to see if it helps?
| 

yeah good point Pavel, at moment the code checks for cpu family/stepping
but if the "nolapic" option will help -- definitely sonething screwed :(
Michael, please give it a try.

| -- 
| (english) http://www.livejournal.com/~pavelmachek
| (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
| 
	-- Cyrill
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