Although there are many threads already running on kmalloc and vmalloc but I did not get my exact answer so I am putting it here.
As far I know,
kmalloc : It is kernel API which allocates physically as well virtually contiguous memory.
vmalloc : It is kernel API which allocates physically non contiguous but virtually contiguous memory.
Now my question is : In both cases (kmalloc or vmalloc) address or say pointer returned by both APIs is LOGICAL ADDRESS correct ?
Memory Management has always been grey part for me in linux kernel so please correct me if my understanding is wrong.
Yes, the pointer can be dereferenced in your code to access the allocated memory.
Those functions that return another kind of memory reference do not return void* I think. They usually return unsigned long or typedef'd types.