I'm a newbie to the kernel programming. Can any one
clarify my following querie(s).
i) Is there any restriction imposed on the memory to be
allocated inside a KEXT and its related functions .
IMOO the new/delete operations do not use such generic memory
management as for example IOMalloc, so new/delete have some additional
limitations for listed below...
ii) If so , Whats the maximum limit ?
If you use IOMalloc, then you restricted to the comparably small
limit of about 100 -- 200 Mb (I don't know the actual size of the pool)
If you use IOBufferMemoryDescriptor then you limited with 4Gb
address space.
If you use 10.4 64-bit memory manager/IODMACommand you have full
64-bit addressing.
iii) Can i allocate 1MB ( i.e. char [1024][1024] )
memory in generic kext start function ?
Yes you may but remember that heavy loading of stack is not a good
practice that leeds to the system inconsistency and difficultly
tested bugs.
Please help me . Thanks in Advance.
-JanakiRam.
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