On 12/21/2012 09:11 PM, Yinghai Lu wrote:
> On Fri, Dec 21, 2012 at 7:25 PM, H. Peter Anvin <h...@zytor.com> wrote:
>> On 12/21/2012 07:23 PM, Eric W. Biederman wrote:
>>>
>>> In this case YH has been working on the case of loading a kernel
>>> completely above 4G, and apparently he has also been testing the case of
>>> running a kernel with no memory below 4G.
>>>
>>
>> It is worth noting that we cannot run with *no* memory below 4G -- it is
>> not possible to run SMP at least without some memory below the 1M mark.
>
> yes need keep 8k or so for trampoline.
>
> but kdump only use one CPU.
>
... except we have an active request to change that, and the trampoline
is more like 20K depending on options.
-hpa
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