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Date:      Sun, 18 Jan 2009 22:17:48 +0100
From:      Attila Nagy <bra@fsn.hu>
To:        Gavin Atkinson <gavin@FreeBSD.org>
Cc:        Maxim Sobolev <sobomax@FreeBSD.org>, Dimitry Andric <dimitry@andric.com>, freebsd-current@FreeBSD.org
Subject:   Re: FreeBSD panics with 64GiB of RAM
Message-ID:  <49739C7C.10700@fsn.hu>
In-Reply-To: <20090118164930.R24894@ury.york.ac.uk>
References:  <496B115F.1000105@fsn.hu> <4970BB63.7030601@andric.com>	<4970E8C0.1080005@FreeBSD.org> <49720DFE.3080808@fsn.hu> <20090118164930.R24894@ury.york.ac.uk>

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Gavin Atkinson wrote:
> On Sat, 17 Jan 2009, Attila Nagy wrote:
>
>> Hello,
>>
>> I've already tried something similar. The effect of the patch is this:
>> http://people.fsn.hu/~bra/freebsd/20090107-freebsd-x4540/Screenshot-70.png 
>>
>>
>> BTW, this:
>> ftp://ftp.freebsd.org/pub/FreeBSD/snapshots/200812/8.0-CURRENT-200812-amd64-bootonly.iso 
>>
>> boots up fine (to sysinstall).
>> I haven't installed FreeBSD for years (I'm using netboot), is this i386?
>> That could explain the situation.
>
> I'm confused.  That link is a snapshot of amd64 -CURRENT from 
> December. The first email in this thread said you were trying -CURRENT 
> anmd64 and it wasn't working.
>
> So, which ones work and which don't?  Are we looking at a regression 
> since December or has this been fixed between whatever image you first 
> tested and the December snapshot?
The screenshots were made with an up to date (at that point of course) 
8-CURRENT.
But I've tried to boot with the snapshot ISO, which boots fine.

Summary:
- the original problem: with a fresh pxeloader, the machine halts at 
this point: 
http://people.fsn.hu/~bra/freebsd/20090107-freebsd-x4540/Screenshot-6.png
- 8-CURRENT, booting with an older pxeloader panics with this: 
http://people.fsn.hu/~bra/freebsd/20090107-freebsd-x4540/Screenshot-55.png
- the 640kB patch panics with this (8-CURRENT, older pxeloader): 
http://people.fsn.hu/~bra/freebsd/20090107-freebsd-x4540/Screenshot-70.png
- with safe mode, I get this (8-CURRENT, older pxeloader, apparently no 
NICs recognized):
http://people.fsn.hu/~bra/freebsd/20090107-freebsd-x4540/Screenshot-78-safemode.png
- the December snapshot ISO with CD-ROM redirection boots fine, and it 
seems the SMAP is OK too:
http://people.fsn.hu/~bra/freebsd/20090107-freebsd-x4540/Screenshot-78-fbsd8-amd64-livefs.png

According to these, I think my problem is the pxeloader's inability to 
boot on this machine. An older one can't boot because of the 
memory-related difference, a newer one can not boot because of another 
changes, happening in-between.

Somebody please help. :)

I don't know if there is a version, which can get to the loader prompt 
AND initialize what need to be initialized correctly to overcome the 
SMAP-panic.



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