Re: About kernel memory limit

Hi Geraint, On Thu, Nov 10, 2011 at 8:44 PM, Geraint Yang <geraint0923@gmail.com> wrote:

Hi Dave, Thank you for your help ! Does it mean that I could use all of the memory my computer has? But one of my classmates told me that kernel could only use 1G from a 4G memory.computer...Is there anything I have misunderstood ?

There is a certain amount (exact amount depends on the architecture and configuration) that can be accessed directly all of the time. Then there is high memory, which can be accessed using kmap/kunmap. See http://linux-mm.org/HighMemory If you have a 64-bit system, then you can access all of the memory directly. -- Dave Hylands Shuswap, BC, Canada http://www.davehylands.com