On Thu, Nov 18, 2010 at 12:08:11PM +0100, chefren wrote:
> We use a custom i386 RAMDISK_CD kernel: basically we add most options from 
> GENERIC and
> GENERIC.MP.
> 
> Upgrading from 4.6 to 4.8, this kernel hangs forever after:
>     root on rd0a swap on rd0b dump on rd0b
> 
> The problem turns out to be MP; activation of the secondary processors.
> 
> The custom kernel works fine on a single-core machine, and a recompiled 
> kernel without
> config lines
>     option MULTIPROCESSOR
>     cpu* at mainbus?
> also works fine everywhere.
> 
> 
> --
> The problem can be reproduced by simply adding those two MP config lines to 
> the standard
> RAMDISK_CD kernel config.
> 
> 

It is likely that this is an 'option SMALL_KERNEL' interaction, however realize
this is a configuration that OpenBSD isn't likely to support.

Dale Rahn                               dr...@dalerahn.com

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