On Thu, 2010-08-19 at 16:15 -0500, Michael Hennebry wrote:
On Thu, 19 Aug 2010, JD wrote:
> Problem comes as Michael explains, that when a process needs a large
> "physically contiguous" chunk of memory, it might not be available.
> That said, usually, requests for physically contiguous memory is only
> needed when wanting to map very large number of DMA pages for
> doing direct physical I/O.
> Otherwise, a process itself does not need to have physically contiguous
> pages. Only the virtual space allocated to that "malloc" or large buffer
> declaration in a program, is contiguous.
Why would malloc or a large buffer declaration
require physically contiguous memory?
I have te equally interesting question? Why
you think malloc allocates
memory blocks in the swap area. Do you have a reference for such a
statement?
--
Aaron Konstam <akonstam(a)sbcglobal.net>