Hi!

> >     bios-e820: 000000000009f400 @ 0000000000000000 (usable)
> >     bios-e820: 0000000000000c00 @ 000000000009f400 (reserved)
> >     bios-e820: 0000000003f00000 @ 0000000000100000 (usable)
> >     bios-e820: 0000000003f00000 @ 0000000000100000 (usable)
> >     bios-e820: 0000000000100000 @ 00000000fff00000 (reserved)
> >    (at this point, it appears to be in an infinite printk loop <?>)
> > 
> > I didn't spend much time looking into the printk loop, but it seems to 
> > end up there, even if CONFIG_DEBUG_BUGVERBOSE is not defined, as if the 
> > ".byte 0x0f,0x0b" is causing the loop to begin.
> > 
> > Any ideas/suggestions/comments?
> 
> Having been over the code the problem is indeed the bios reporting overlapping
> /duplicated ranges. That will cause a crash in mm/bootmem when we try and free
> the range twice.
> 
> I suspect you need to add some code to take the E820 map and remove any
> overlaps from it, favouring ROM over RAM if the types disagree (for safety),
> and filter them before you register them with the bootmem in 
> arch/i386/kernel/setup.c

...plus prining ?@#@&#&$ BIOS reports invalid mem map
seems like good idea, so that bios bugs are fixed.

-- 
Philips Velo 1: 1"x4"x8", 300gram, 60, 12MB, 40bogomips, linux, mutt,
details at http://atrey.karlin.mff.cuni.cz/~pavel/velo/index.html.

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