[SDBUG] More than 4GB of RAM on amd64?

[Can Erkin Acar]

Hi,

The main reason > 4G memory is not enabled by default is that some
32-bit devices (even on 64-bit hardware) exist that can not handle
transfers to > 4G addresses. Most drivers do not handle this situation
(using bounce-buffers etc.) that means things may break unexpectedly
depending on your particular hardware configuration and/or memory
usage patterns.

Best,

Can


On 11/13/09, Matt Szubrycht <matts at bmihosting.com> wrote:
> Enabling PAE and recompiling kernel did it for me on i386 FreeBSD.
>
> Cheers,
> M./
>
>
> On Nov 12, 2009, at 9:29 PM, Michael J McCafferty wrote:
>
>> All,
>> 	I just put OpenBSD 4.6 amd64 on a 8 core server with 16GB of RAM.
>> OpenBSD only sees 3.5GB. Am I out of luck? I see a scarce few posts when
>> I Google for this. Does anyone have any more info on when/if there
>> is/will be support for big memory?
>> 	This is for a customer who is using OpenBSD for is eCommerce setup and
>> he's really beating up the hardware he has now. He needs more power! :o)
>> He is resistant to changing to FreeBSD.
>>
>> Thanks!
>> Mike
>> --
>> ************************************************************
>> Michael J. McCafferty
>> Principal, Security Engineer
>> M5 Hosting
>> http://www.m5hosting.com
>>
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