Server with 3TB Crashing at boot

[Julian Elischer]

On 3/12/15 2:32 AM, Michael Fuckner wrote:
> 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 at 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
>
ok, it looks like it is in one big chunk..  so that is not an issue.