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Date:      Tue, 30 Jan 2018 19:42:28 +0700
From:      Eugene Grosbein <eugen@grosbein.net>
To:        Andre Albsmeier <Andre.Albsmeier@siemens.com>
Cc:        freebsd-stable@freebsd.org
Subject:   Re: i386 with 4GB RAM: less than 2GB available on A2SAV (Intel Atom E3940)
Message-ID:  <5A706834.8030405@grosbein.net>
In-Reply-To: <20180130065931.GA43711@bali>
References:  <20180128145703.GA80724@bali> <5A6DF168.3010902@grosbein.net> <20180130065931.GA43711@bali>

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On 30.01.2018 13:59, Andre Albsmeier wrote:

>> Also, I'd like to know reasons that made you stick to 32 bit OS
>> as we have pretty good support for 32 bit applications running under 64 bit system.
> 
> I (still) have 32 bit machines and don't want to maintain 2 userlands.
> Each machine has its own kernel but userland (updated via nfs) must
> remain 32 bit.
> 
> Or is it possible to boot a 64 bit kernel and have everything else in
> 32 bit?

I have not tried "everything else in 32 bit", there may be some rough edges
dealing with run-time linker but you can try.

/sbin/init is statically linked and it should work with kernel having option COMPAT_FREEBSD32.
/bin/sh may be OK too provided /libexec/ld-elf32.so.1 is in place.

You should really consider switching to 64 bit kernel for such hardware.





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