Server with 3TB Crashing at boot

Julian Elischer julian at freebsd.org
Wed Mar 11 19:13:43 UTC 2015


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.


>
>>
>>
>> -adrian
>>
>>
>> On 11 March 2015 at 06:45, Michael Fuckner <michael at fuckner.net> wrote:
>>> Hi,
>>>
>>> I have a server with 4 Xeon E7-8857 v2 and 96x32TB, organized as 8 Memory
>>> Risers with 12DIMMs each. With 2 Risers I can boot the System with
>>> FreeBSD10.1-p6, when adding a third riser (above 1TB RAM) the system crashes
>>> on boot.
>>>
>>>
>>> http://dedi3.fuckner.net/~molli123/temp/3tb_ap1_phy2.png
>>> http://dedi3.fuckner.net/~molli123/temp/3tb_crash.avi
>>>
>>>
>>> Here is the dmesg/ verbose dmesg, but I believe the verbose one got
>>> truncated. Is there anything more I can do than booting verbose and to copy
>>> /var/run/dmesg.boot?
>>>
>>> http://dedi3.fuckner.net/~molli123/temp/dmesg_q71l-4u_verbose.txt
>>> http://dedi3.fuckner.net/~molli123/temp/dmesg_q71l-4u_10.1.txt
>>>
>>> Regards,
>>>   Michael!
>>>
>>> PS: already posted to freebsd-amd64, but I was told these lists are better.
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