kernel memory

[Peter Wemm]

On Thursday 21 July 2005 10:35 am, Petri Helenius wrote:
> What is the maximum kernel memory for amd64? Addresses by default
> seem to start with 0xffffffffxxxxxxxx so one could assume a 4gig
> limitation?
>
> Pete

2GB for paged kernel memory.  But in addition we access memory via the 
direct map area to avoid the need for temporary mappings in many cases.  
uma (malloc, mbufs) etc use this, as does the sfbuf temporary mapping 
system.

-- 
Peter Wemm - peter at wemm.org; peter at FreeBSD.org; peter at yahoo-inc.com
"All of this is for nothing if we don't go to the stars" - JMS/B5