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Date:      Thu, 12 Mar 2015 10:32:43 +0100
From:      Michael Fuckner <michael@fuckner.net>
To:        Julian Elischer <julian@freebsd.org>,  Oliver Pinter <oliver.pinter@hardenedbsd.org>, Adrian Chadd <adrian@freebsd.org>
Cc:        "freebsd-hackers@freebsd.org" <freebsd-hackers@freebsd.org>, freebsd-hardware@freebsd.org
Subject:   Re: Server with 3TB Crashing at boot
Message-ID:  <55015D3B.6030605@fuckner.net>
In-Reply-To: <550093DD.5040603@freebsd.org>
References:  <550046F7.1050205@fuckner.net> <CAJ-VmokruCyo3M5up9n%2BAfvkr7VFBtUftpdgc=52ES%2BNt6=JZA@mail.gmail.com> <CAPQ4ffsd-SpsLTbGL8BdBsNHLx9HhVQ4Wh%2B95M98fCmT5idPAg@mail.gmail.com> <550093DD.5040603@freebsd.org>

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On 03/11/2015 08:13 PM, Julian Elischer wrote:
> On 3/11/15 8:39 AM, Oliver Pinter wrote:
>> On Wed, Mar 11, 2015 at 4:26 PM, Adrian Chadd <adrian@freebsd.org> wrote:
>>> Hm, have you tried with just one TB of RAM? I haven't had access to
>>> systems with 3TB of RAM - I'm just about to get 1TB in a box. :)
>>>
>>> Hm, other hackers - what's the current size of the AMD64 direct map?
>> 4TB -
>> https://github.com/freebsd/freebsd/blob/master/sys/amd64/include/vmparam.h#L157
>>
>
> yeah but since direct-map is, well, directly mapped, you might have 3TB
> of ram but it might be spread over  a larger range.
> there may be holes in it..  it would be worth knowing the apparent
> layout of the ram.
is it this you are looking for (from OpenSUSE 13.2)?


http://dedi3.fuckner.net/~molli123/temp/dmesg.smp.disabled.txt
http://dedi3.fuckner.net/~molli123/temp/dmesg-s4l_opensuse13.2.txt


[    0.000000] e820: BIOS-provided physical RAM map:
[    0.000000] BIOS-e820: [mem 0x0000000000000000-0x00000000000997ff] usable
[    0.000000] BIOS-e820: [mem 0x0000000000099800-0x000000000009ffff] 
reserved
[    0.000000] BIOS-e820: [mem 0x00000000000e0000-0x00000000000fffff] 
reserved
[    0.000000] BIOS-e820: [mem 0x0000000000100000-0x00000000784affff] usable
[    0.000000] BIOS-e820: [mem 0x00000000784b0000-0x0000000078c63fff] 
reserved
[    0.000000] BIOS-e820: [mem 0x0000000078c64000-0x0000000078ca6fff] 
ACPI data
[    0.000000] BIOS-e820: [mem 0x0000000078ca7000-0x000000007a268fff] 
ACPI NVS
[    0.000000] BIOS-e820: [mem 0x000000007a269000-0x000000007bdc3fff] 
reserved
[    0.000000] BIOS-e820: [mem 0x000000007bdc4000-0x000000007bdc4fff] usable
[    0.000000] BIOS-e820: [mem 0x000000007bdc5000-0x000000007be4afff] 
reserved
[    0.000000] BIOS-e820: [mem 0x000000007be4b000-0x000000007bffffff] usable
[    0.000000] BIOS-e820: [mem 0x0000000080000000-0x000000008fffffff] 
reserved
[    0.000000] BIOS-e820: [mem 0x00000000fed1c000-0x00000000fed1ffff] 
reserved
[    0.000000] BIOS-e820: [mem 0x00000000ff000000-0x00000000ffffffff] 
reserved
[    0.000000] BIOS-e820: [mem 0x0000000100000000-0x000003007fffffff] usable





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