The limit of kernel memory in 64bit system

[nick]

J.Hwan,
There is a limit as 64 bit can only support 16 extabytes. Greg is right in that there is no real limit 
on modern machines because of this. However from my knowledge, system ram is split into a 3 to 1 ratio,
where 75 percent is for user space and the only quarter is for the kernel's memory. So on my system with
8 GB of ram, the kernel can use up to 25 percent or 2 GB of ram.
Hope this answers your question,
Nick
On 2014-11-29 12:45 PM, Greg KH wrote:
> On Sat, Nov 29, 2014 at 12:25:43AM +0900, J.Hwan Kim wrote:
>> Hi, everyone
>>
>> As far as I know, the kernel memory limit is 1GB in 32bit system.
>> Is it also applicable to 64bit system?
>> What's the limit of kernel memory in 64bit system?
> 
> There is no limit :)
> 
> What do you really want to know this for?
> 
> greg k-h
> 
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