Apple

On Apr 23, 2007, at 7:46 AM, Shawn Erickson wrote:

On Apr 22, 2007, at 10:46 PM, Gaurav Kumar wrote:

I am using IOkiit framework for my driver in cpp and Mac OS 10.4.8.

IOmalloc and malloc not able to allocate memory for my requirement.

Can you better explain why IOMalloc or IOMallocPageable (and friends) are not able to meet your requirements?

Anyway review...

<http://developer.apple.com/documentation/Darwin/Conceptual/KernelProgramming/vm/chapter_7_section_9.html>

-Shawn

And also <http://developer.apple.com/qa/qa2001/qa1197.html>. The title of the Q&A refers to mapping kernel memory to userland, but the usage of IOBufferMemoryDescriptor vs. IOMalloc described in the Q&A is pertinent.

--gc

____________________________________________________________________

Garth Cummings email@hidden

Sr. Software Engineer

Apple Developer Technical Support

<http://developer.apple.com/technicalsupport>

WWDC 2007 • June 11-15 • Moscone West • San Francisco, CA

<http://developer.apple.com/wwdc/>

References:
	>Memory allocation problem in kernel space..... (From: "Gaurav Kumar" <email@hidden>)
	>Re: Memory allocation problem in kernel space..... (From: Shawn Erickson <email@hidden>)